Cladded Windows And Doors: Everything You Need To Know

Photo of house with slimline sliding system .

It’s easy to understand why more and more homeowners and architects favor slim profile windows and doors. However, windows which combine functionality and style with elegant, slim profiles aren’t always the easiest to find. This is particularly true for those who prefer wooden windows and doors. With its natural beauty, wood can provide a specific look or warmth, particularly inside the home, that materials such as metal or vinyl simply cannot. To solve this problem, cladded windows were developed to provide all of the natural beauty of wood with the strength and durability of metals such as aluminum, copper, and bronze.

If properly maintained, wood can last for decades, if not centuries, but it will need regular maintenance. Going between the extremes of harsh winters and hot summers, wear and tear becomes evident on wooden windows. This is why if you’re looking for truly ultra-slim wooden windows that will last, you should consider the benefits cladded windows can offer.


What Exactly Are Cladded Windows?


Illustration of types of materials available for cladded windows

Cladded windows are, without a doubt, one of the most important innovations in the history of windows. Cladded windows are wooden windows which have been fitted with a metal, or occasionally vinyl covering on their exterior. The covering, or cladding as it is known, provides an additional degree of thermal insulation and weather resistance for the windows.

Cladding effectively protects the wooden windows from the elements and maximizes their longevity. Essentially, this means that you get to have all of the benefits of a durable material such as aluminum (or copper or bronze) on your home’s exterior as well as being able to enjoy the look and feel of wooden windows inside your home.

To achieve maximum longevity with our cladded windows, we use extruded aluminum which is welded onto the frame prior to powder-coating. This allows for a uniform, flush, and exceptionally slim and durable window profile. This is in contrast to roll-form aluminum which is much cheaper but significantly less robust.




What Are The Benefits of Cladded Windows?



Ultra-Slim Profiles


Image of an ultra-slim cladded sliding door system.

Perhaps the most sought after  benefit of cladding is how it can be used to create exceptionally slim and completely flush profiles on windows and doors.

Take our own sliding door system, for example. The OPEN m40, is comprised of cladded wood-aluminum. Its beautiful 1¾” wooden frame contains a robust, supporting internal aluminum frame. The wooden exterior provides all of the natural beauty of wood while aluminum offers additional strength and durability.

As a result of this, the aluminum cladding will ensure that the door needs little or no maintenance and will be watertight and perfect for all seasons.

To learn more about it, read our article on it here.


Cladded Windows Are More Efficient


Wooden windows already have a relatively high level of thermal insulation. However, alu-clad windows have a thermal break between the wood and the aluminum. This means they are significantly more thermally effective. The layer of cladding will help stop any unnecessary drafts or ‘cold spots’ within the home. As a result of this, your home will be more energy efficient. Cladded windows will often have a lower U-Value which means optimal comfort for you and your home. Another aspect of their efficiency is the peace of mind that comes with knowing that you won’t need to constantly maintain cladded windows. 

Below you can take an in-depth look at a recent alu-clad project we worked on in Tribeca in Manhattan. Open Architectural Windows and Doors supplied hundreds of windows and doors for this new build project. The oversized, cladded windows and slim profiles offer unbroken views of the city. In keeping with the aesthetic of the neighborhood, Open AWD supplied oversized arch-top windows for the top floors of the complex.

Improved Durability



photograph of exterior aluminum windows.

Pictured inset: Exterior of Alu-clad curtain wall system which OPEN AWD for a development in Tribeca, Manhattan.

Cladded windows are some of the most durable windows available to buy. Whether it’s a simple residential project, or a larger, more high-value project, cladded windows have an almost unmatched longevity. They are an investment in your home’s future. By investing in them, you are ensuring that your home’s exterior won’t depreciate as quickly as it would with standard wooden windows.

As we mentioned above, wood requires more-or-less annual, if not seasonal, upkeep. This often includes staining, sealing, or re-painting. This is particularly true in harsher climates. But this is simply not the case with cladded window, which need no maintenance because they are weather-resistant. The fact that the materials we use (aluminum, bronze, and copper) are completely non-porous (unlike wood) the windows suffer significantly less wear and tear over time.


Pictured: Alu-clad custom window and curtain wall system. Click to enlarge.


Improved Aesthetic Possibilities 


Image of an open bronze-clad window.


Aesthetically, cladded windows have a major advantage over standard wood and even standard aluminum windows. Cladded windows are custom-made to suit each home.

This means you get the best of both worlds. The look and feel of wooden windows within your home’s interior, as well as a robust, high-value metal to suit your home’s exterior.

Whether your home’s facade is brick, concrete, wood, or siding, cladded windows can be made to complement any exterior. They can be made to a wide range of different shapes and sizes.

Pictured: copper-clad windows at The Fitzroy, Manhattan.


Case Study: The Fitzroy, Manhattan


Below, you can see some pictures from a project Open Architectural Windows and Doors worked on two years ago in Chelsea in Manhattan.

The striking copper-clad oak windows bring the building’s façade to life. It added a distinguished look to the building’s exterior and complemented the unique terra-cotta brickwork. 

This large-scale project boasts over 200 custom copper clad windows, and numerous other copper finishes. The beautiful copper-clad windows  are a perfect marriage of functionality and style. The double and triple glazed glass and superior installation ensures that the windows are soundproofed from the busy exterior, and allow for energy efficient heating and cooling.

As you can see from the picture, copper-clad window age gracefully over time as their patina becomes more and more pronounced.

To learn more about this project, click here.


Pictured below: Copper-plated bronze clad windows and doors at The Fitzroy. Click to enlarge.


Contact Us Today


This image contains wooden windows and Manhattan is in the background

If you would like to learn more about cladded windows, please contact us today at 718-403-0300 or send us an email us here to set up your free consultation.

We know that no two people have the same tastes which is why all of our cladded windows are completely customizable. 

OPEN Architectural Windows and Doors: Making your architectural plans a reality.


Interior Steel Doors and Partitions: Why More People Are Choosing Them.

Image of large glass and steel doors

With all of the work that goes into ensuring you get the perfect windows and doors to suit your home’s exterior, it can be easy to overlook your home’s interior. Although ultra-slim profile windows and doors will help bring light into your home, without the right interior doors, that light won’t be distributed evenly throughout your home. This is where interior steel doors and partitions come in. Not only will they brighten it up even further, interior doors and partitions offer additional privacy as well as a greater sense of space within your home.

Whether it’s to add a modern element to a more traditional home, or to add an industrial finish to a more modern style of home, interior steel doors and partitions can be a great way to transform the feel of your home’s interior. This article will give you some helpful tips on what to look out for when it comes to considering interior doors and partitions for your home.


The Beauty of Interior Steel Doors 


Aesthetically, slimline interior steel doors and partitions, which feature large glass panels and minimal sight lines, offer unrivalled potential for your home’s interior.

As a result of this, they have seen a massive increase in popularity in recent years and it’s not difficult to see why. Steel-framed interior doors and partitions are an exceptionally versatile way of doing more with less in your home. 

Steel’s strength means that slimmer and sleeker frames and sight lines can be achieved easier than with wood for example. Smaller frames mean more glass on display. More glass means more light, which means a brighter home that looks and feels more spacious.

This not only suits modern homes, but also homes with industrial or even mid-century looks.

Hinged, Sliding, Bi-Fold, or Partition?


Interior Steel Doors


An ideal way to maximize space and light within your home, our sleek interior Steel Door will open any space up. Interior steel doors look at home in every environment. Whether it’s to separate the living room from the kitchen; to seal off and display your walk-in wardrobe; or even just to bring some much-needed light into a room.

These doors are available as hinged, sliding, or as bi-fold (sliding-folding). Each has their own unique benefits and appeal based on your tastes and the amount of space available in your home. Sliding doors are an excellent choice where space makes a hinged door difficult to open.

Assembly brackets can be built into the wall, ensuring that the door can be seamlessly incorporated into any living space. Perfect for both classic and contemporary homes, our slimline, powder-coated steel-framed interior doors create privacy without sacrificing any natural light.

Our doors are custom-designed to suit your home’s aesthetic or specific needs and and can be finished in any standard RAL colour.

Perfect for a walk-in wardrobe or simply to brighten up and connect spaces. Click to enlarge



Our custom-made, ultra-slim interior steel room partitions are the ideal way to separate spaces within your home. Furthermore, whether it’s to add light into a hallway or a room, or simply to add a sense of privacy into a bathroom, interior steel partitions enhance every environment.


Custom-Made Is Better Made


Everyone knows that custom-made is better made. Open Architectural Windows and Doors work with each client to design doors and partitions which reflect their unique tastes. We don’t believe you should have to settle for a cookie-cutter approach to interior doors and partitions. We value your tastes and our goal is to help you create doors and partitions which reflect that. Available in a variety of metals, our doors and partitions are completely customizable. This includes everything from the style of door, down to the type of metal, glass, muntin, and handle.



Choose from different muntin types and thicknesses to ensure that your door or partition reflects your aesthetic. Muntins plays an important role in the overall aesthetic of doors and partitions. Below are three popular styles of muntin. Click to enlarge.



Available in Bronze, Stainless Steel, Brushed Steel, Polished Steel, and Corten. Learn more about our most popular types below. Pictured below, from left to right: Powder-Coated Steel, Stainless Steel, Corten, and Bronze.



We offer a vast selection of sleek and elegant door handles for your interior door. Custom-made to suit your interior. We also offer a variety of locking systems. Below is simply a selection of some of our handles. Click to enlarge.


Additional Concerns

There are certain styles, and colors that will be more suitable for certain rooms and home. For example, rooms in which children play, or the risk of falling is greater (bathrooms and showers), it is important to choose doors or partitions with child-friendly (safety) glass. Similarly, with regards to wine cellars or cabinets, where room temperature is a concern. We can help you find the right door or partition for your home.


Recent Interior Steel Door Projects


Below you can see a selection of photos of recent custom profiles designed for our clients. As you can see, each unit has exceptionally slim sight lines. Elegant and sleek, our custom-made interior steel doors and partitions can be tailored to suit any environment.

Click to enlarge.
Another recent custom profile, a shop drawing, and a rendering. Click to enlarge.

Find the Right Interior Doors and Partitions for Your Home


Image of two steel interior doors.

We know that no two people have the same tastes which is why all of our interior steel doors and partitions are customizable. From the style of door, to the frame material, everybody wants to find the find right one for their homes. For more information about steel in general, you can read our article on steel windows here.

Contact us today at 718-403-0300 or send us an email us here to set up your free consultation.

OPEN Architectural Windows and Doors: Making your architectural plans a reality.


Everything You Need To Know About Window Testing

As any homeowner knows, there is nothing more frustrating than bad, leaky windows. Windows which allow in drafts, create cold-spots, allow condensation, damp, and mold to gather, and don’t provide adequate resistance to noise pollution, are windows you don’t want in your home. And, as anyone who has ever lived in a typical New York City apartment can tell you, standard double-hung windows provide little protection from any of the above. Even windows which look great aren’t immune to these defects. As a result, windows must undergo rigorous window testing to ensure they are adequately protected and have been correctly installed.

Conducting window testing is one of the most crucial and effective ways of ensuring that windows and doors fitted in your home perform as needed and  expected. Few people know what exactly window testing means is or just how important for their home it is. Knowing what it is, and knowing that your windows have been rigorously tested according to strict standards, can bring homeowners great peace of mind.     

What Is Window Testing?


Windows and doors often represent a significant portion of the facade of the average home. With larger buildings, windows, doors, and curtain wall systems can constitute up anywhere from 50-100% of the building’s facade and envelope. As a result of this, they make up an important component of the architecture and represent a considerable amount of the overall construction costs. Similarly, careful attention needs to be paid to ensure that windows and doors are airtight, watertight, and able to withstand significant wind-loads. 

To put it simply, window performance testing is exactly what it sounds like: using various testing methods to determine the efficacy and efficiency of a window’s performance. Window testing is carried out in order to make sure that an optimum level of comfort can be maintained within the home. There are various methods of testing a window’s performance, each of which will be explained in more detail below. 


Why It Matters


It is hard to overstate the importance of window performance testing. According to a study by the National Fenestration Rating Council, the average American spends anywhere from $1,500 to $2,500 on energy bills each year. 45% of that goes to heating and cooling their homes.

If the windows in your home are old, weren’t installed properly, or have fallen into disrepair, this number increases. Badly designed, poorly installed, and even windows which were not tested correctly, can significantly impair how efficient your windows are. In addition to costing you more money in energy bills, their inefficiency means that they are also harming the environment. 

The North American Fenestration Standards is the body which dictates the guidelines around fenestration standards for all residential projects in North America (US & Canada). In addition to NAFS, each jurisdiction is governed by its own specific rules and regulations.

For example, all windows and doors installed in buildings in New York City must meet the requirements of the NYC Energy Conservation Code. For more on that, see here


What We Test For


Here at Open Architectural Windows and Windows, we fully understand the importance of testing. All of our windows are rigorously tested to ensure that they meet all US and regional standards and codes. Each specific jurisdiction has their own codes. There are two main ways for testing window performance–laboratory and field testing. Both laboratory and field testing are used to test specific components and potential issues with a windows’s performance.

Lab Testing


As it suggests, laboratory testing is carried in a lab under specific conditions. Often, these conditions will be designed to mimic conditions of the climate in which the windows will be installed. Lab testing is an important step because windows can because the testing conditions and variables can be easily controlled. While we are involved in the testing process, tests are carried out at certified, independent laboratories.

Wind Load Testing

We use machines which mimic high wind loads to place enormous amounts of pressure on windows during testing. The wind loads will usually be higher than winds the windows are likely to ever encounter. The level of testing will usually be determined by the building’s structural engineer. This will depend on the building’s location, shape, the size of the IGUs, as well as the window-to-wall ratio.

Thermal Efficiency Testing

A thermal chamber is used to help determine the thermal efficiency of the windows. Thermal efficiency is determined by calculating its U-Value. Thermal testing is a particularly important step as it helps to ensure that the windows will provide optimum comfort to the occupants of the property. 

Water and Air Infiltration

In order to test for water and air infiltration, jets of water and air are sprayed onto the exterior of the windows. Negative pressure will be applied in the interior to see whether or not any water or air makes it through to the interior. Water and air tightness are some of the most important testing aspects. They need to be rigorously tested in any window. Not testing properly can result in drafts or water damage. Over time, this can lead to corrosion to the interior and surrounding areas. Another very important factor to consider is comfort: without air and watertight sealing, temperatures within the home will be very unstable. In some instances, this may even lead damp, mold, first, or ice on the interior of the window. 

Cycle Testing

Cycle testing involves the use of machines to continuously open and close the windows over a set period of time. The aim with cycle testing is to ensure that windows perform exactly as well after the testing as they did before it. This is a very important step as we won’t sell and windows which haven’t been rigorously tested for performance issues.

Field Testing


Field testing will be carried out once a licensed installation team has installed the windows. Field testing is an opportunity to rigorously test the windows once they have been integrated into the building envelope. In some cases, field testing will produce slightly different results than lab testing. Although measures are taken to mimic the conditions and climate in which the windows will be installed, minor variations can occur. This is often a result of varying weather conditions and installation issues. 

Water & Air Tightness


Much like the water and airtightness testing mentioned above, water and airtightness are also tested during the onsite window installation process. This is to ensure that the results from lab testing can be recreated once a licensed and certified installation team have installed the windows.

To do this, we recreate the chamber in the lab. Then, we apply jets of water and air to the exterior of the windows. Using negative pressure inside the building, we can then test to see if either wind or water appears inside.


Additional Testing Methods

There are several other types of customized testing available. Not all will be necessary for each customer but each offers its own unique peace of mind.


One of the most common things we hear from customers is their issues with noise pollution. This is particularly true in places such as New York City. Traffic, low-flying planes,  loud talking, even noisy neighbors. All of these can be dealt with more effectively via well-made windows which have been tested according to our standards. In lab testing, we subject the windows to very high levels of sounds in order to determine how much sound the windows block out. This process produces an Outdoor-Indoor Transmission Class (OITC) rating. We work with each individual client to determine their specific OITC rating.

Limiter Testing

Limiters, sometimes known as window restrictors, can also be tested. Testing for this can be useful where there is a particular concern that young or vulnerable people are at risk of falling from a window. 

Resistance Class Testing

Windows can be tested for how breakthrough resistant they are. This is important to consider if safety or security is a concern.

Fire Resistance

For additional peace of mind, windows can also be specifically tested for their fire resistance capability


Contact Us Today


If you’d like to learn more about our windows or the testing process, contact us today on 718-403-0300 or email us at for a free consultation.

Let OPEN AWD help you to push your limits and make your project the best it can be.

Size Matters: Why Architects Choose Oversized IGUs.

Image showing a view of skyscrapers as seen through an oversized window.

As technology continues to change, so, too, do our windows. Innovative solutions continue to make possible that which seemed impossible, and even unimaginable, a decade ago. Perhaps the most apparent change within the window industry is the transition from windows being a solely functional part of our homes to being an integral part of your home’s design and aesthetic.

One of the most important developments has been the advent of the oversized IGU. Widely used in retail outlets and showrooms, oversized windows are an exceptionally effective way of emphasizing a building’s design, and illuminating and highlighting the building’s interior design. Increasingly, however, more architects and homeowners alike are becoming interested in what oversized windows can do for their homes.


Why Choose Oversized IGUs?


Image of people on a crain installing an oversized IGU

There are many reasons why people look for oversized IGUs. A major part of why oversized IGUs are so sought after and used within retail spaces, such as shops and showrooms, is because they offer stunning, uninterrupted views.

As a result of this, they are occasionally used in buildings with modern designs. This is because larger windows allow properties to showcase what’s inside. Newer buildings are often designed to facilitate larger windows for this purpose. 

Standard-sized windows simply cannot match the appeal, or the design possibilities, that oversized windows offer. Oversized units provide a greater sense of openness within a space. Likewise, with increased light and views, they blur the lines between a building’s interior and exterior. Again, this is perfect if you have something inside you would like to show off, or, on the other hand, if you would like to better enjoy the surrounding views.

This means they’re also perfect if you have a view, or your property overlooks your garden, or is situated next to the coast. Additionally, oversized IGUs offer significantly more wind resistance than standard sized windows. They are designed to withstand extreme weight loads and weather conditions. 

Here at Open Architectural Windows and Doors, we are excited to share our new range of oversized IGUs with you. We are now able to provide IGUs of up to 10.5ft x 61ft. All units are processed, tempered, laminated, printed, coated and cold bent. Our uniquely oversized IGUs are designed to give architects maximum freedom. By removing the need to only use standard sized windows, it creates new possibilities within design. What was previously unimaginable, has now become a reality.

Picture shows a licensed and certified crew installing an oversized IGU curtain wall on an OPEN AWD project on the west side of Manhattan.


Advantages of Oversized IGUs


Oversized IGUs provide a greater degree of thermal resistance than standard-sized windows. For example, a single oversized IGU will provide greater thermal insulation than multiple, smaller IGUs. This is due to weak spots or joints, which can allow air to pass through, thereby reducing the window’s efficiency. Larger IGUs mean fewer joints and weak spots, which means greater thermal efficiency and maximum comfort.

Another benefit of more glass being on display means that solar heat gain can be maximized. Solar heat gain is the amount of heat which enters a building through its window. This will be natural heat, such as sunlight.  With more glass on display, more sunlight can enter the building, heating up the space. This will help you to significantly cut down on heating costs. Additional coatings, such as Low-E coatings, can be added to control the amount of heat retained as well as any glare from sunlight.



One of the primary reasons why oversized IGUs are less common is because most window manufacturers and suppliers are simply unable to produce them, let alone install them. As a result, the installation process is usually a little different than with standard IGUs. Designing and manufacturing oversized IGUs requires specialized machinery; installing them requires the use of cranes and machines.

Logistics are also a problem. In cities, entire blocks often have to be shut down to facilitate the transportation of the panels. Only experienced companies are equipped to design and provide oversized IGUs for you. Similarly, only certified and licensed installers are equipped to handle such projects.

Pictures of oversized IGUs being installed at an Open AWD project

Contact Us Today


If you’d like to learn more about how oversized IGUs could benefit one of your projects, contact us today on 718-403-0300 or email us at for a free consultation.

Let OPEN AWD help you to push your limits and make your project the best it can be.



Everything You Need to Know About Glass Types and Performance Ratings

When people first began putting single panes of glass in windows almost two thousand years ago, they performed the relatively simple task of keeping the inside of homes wind and rain free. Fast forward to today and advances in technology have meant that glass can be manipulated and customized to be more efficient, retain more heat, better soundproofed, as well as being an effective way of keeping intruders out of your home. All of these things are done via a combination of more efficient manufacturing processes, coatings, gases, better-constructed IGUs, and higher-performing glass. 

If you’ve ever wondered about glass types or performance ratings, we’re going to explain them to you in plain language in the hope that you will have a better understanding of exactly the kind of glass you need for your windows and doors. We know that when you begin looking into it, it can be difficult to know that you are choosing windows and doors which not only look good, but perform well over time. Should I choose double or triple glazing? High or low U-Value? Tempered, laminated, or impact-resistant? Do I need to consider Solar Heat Gain Coefficient? 

As purveyors of high-quality windows and doors, we thought we could share a little of our expertise with you. Our article will explain in plain language some of these essential questions for you and give you a better understanding of what you need for your home.

Understanding Glass Performance

First, there are some ideas and principles that you’ll need to have a working idea of. These will help you better understand what type of glass might be suitable for your environment and climate. 


 U -Factor

Diagram of U-Factor values

U-Factor (also known as U-Value) is one of the most important aspects of choosing windows and doors. It measures how effectively a window can retain heat inside a home and reduce heat loss. The lower the number, the more heat it retains. So, a window with a U-Factor of 0.20 will retain heat better than one with a value of 0.5. The climate you live in plays a very big role in determining the U-Factor you’ll need your windows to have. More on this below.

Windows have an enormous effect on a wall’s R-Value. R-Value is the rate at which a material resists heat passing through it. A high R-Value means the material (e.g. insulation) is effective at resisting heat flow. As you can see from the diagram, windows with a lower U-Factor can dramatically increase a wall’s R-Value. 


Illustration of solar heat gain and visibility transmittanceSolar Heat Gain, Visibility Transmittance, and Gases


Solar Heat Gain Coefficient (SHGC) is simply the amount of heat that enters a home via its windows. Most of this heat will be natural heat (radiation) from the sun. The lower the number, the less heat it lets in. Conversely, windows with a high SHGC level will allow more heat into the home.

Visibility Transmittance is a scale which helps determine how clear the glass is. This can be affected by things such as Low-E coatings (more on these below), which slightly reduce clarity. For more information on this, you can read about it on the Department of Energy website.

Though not strictly a feature of glass, Gases play a very important role in the overall performance of windows and doors. Traditionally, the space between panes of glass was left empty. However, advances in technology have shown certain gases (which can be denser than air) can actually reduce heat loss in your home.

The most commonly-used gases are argon and krypton. Of those, the most widely used gas is argon. Argon has been shown to significantly reduce unwanted heat loss. Argon has a thermal conductivity rate 67% lower than air. In windows which have been filled with argon, argon usually makes up roughly 95% or more, with air usually comprising 5% or less.


Choosing The Right Glass Type For You

Despite what you might want out of a window, there are several important factors which you need to address. Some of these factors are more or less out of your control. The most important factor here is what kind of climate you live in. If you live in a very cold climate, for example, you should consider investing in windows that will minimize heat loss and increase the amount of heat that can enter your home. What this means, then, is you want a lower U-Factor and a higher SHGC. In warmer climates, this means that you would be better off with windows that have a higher U-Factor and a lower SHGC.

Regardless of your climate, however, everybody should consider investing in high-quality, well-made windows. Heating, Ventilation, and Air Conditioning (HVAC) systems represents a whopping 40% of the average homeowner’s energy bills. This is a huge proportion and investing in more efficient windows will drastically cut this.


How Many Panes?

Cross-section of a passive house window.

It should go without saying that two panes are better than one. Single glazed windows arose out of necessity but, over the course of the past century, have been largely replaced by more efficient, double-glazed windows. Modern and more scientific methods for manufacturing glass and window frames have meant that windows can actually bear more weight but have even smaller frames, which is what most people want.

Triple-glazed windows are, of course, even better again. People living in colder climates with harsh winters, in particular, should strongly consider investing in. More glazing will add more weight to the windows, provide another layer to be filled with argon gas, and another opportunity for more Low-E coating. Each of these aspects will dramatically improve its overall thermal efficiency.

A third layer of glazing will also significantly  reduce the amount of condensation on the inside of your windows. It will act as a more effective barrier against noise pollution, which is particularly important in built-up and urban areas.

Low-E Coatings

Although natural sunlight can bring in some much sought after sunlight and heat, it also brings in ultraviolet rays which cause floors, walls, and fabrics (sofas; cushions etc.) to fade over time. These rays also can cause harm to our skin. To combat this, microscopically-thin, completely see-through, metal coatings were created to lessen the impact of this. Low-E (low-emissivity) coatings use silver to reflect heat. In summer, it reflects the heat entering a house; in winter, it reflects the heat leaving. In essence, it functions very similarly to a thermos (which often contains silver)–it allows you to maintain the desired temperature inside. Warm when you want it to be warm; cold when you need it to be cold.

Within Low-E coatings, there are a number of different ways to adjust the amount of heat which passes through your windows. This can be achieved by adding additional layers or by altering which panels are coated. The level of protection you need will depend on your environment and whether or not your house is in the shade.


Various types of windows.There are many different window styles available. Each style comes with its own unique benefits. Some styles will suit more traditional homes better; whereas others will be more at home on more modern and contemporary buildings.

As you’ll see from the pictures below, choosing ultra-slim profile windows will ultimately have quite a different impact on your facade than choosing slightly thicker, more traditional ones.

There has been a trend towards more slimline windows in recent years. In our experience, this is a trend which has increased year on year. As a result of this, muntins—which were historically used as structural components to divide panels of glass within a window—have become slimmer.


Pictured from left to right: Vanderbilt Avenue, The Fitzroy, and 10 Greene St. Open Architectural Windows and Doors worked closely with the architects to come up with windows and muntins which reflected a holistic design aesthetic.

Windows with functioning muntins in them are known as authentic divided lites. Muntins were originally a practical solution. However, as technology advanced, and the materials for window frames become stronger and efficient, it was unnecessary to actually use multiple glass panels. Instead, it became possible to use one, large glass panel. To recreate the same aesthetic effect of divided lites, simulated divided lites were created. These rest on the window and look almost completely identical to true divided lites. However, they don’t form a structural part of the window.

Another types, although less popular, is grille-between-the-bars. This type features an internal, between the panes. This creates a similar look to muntins, but these windows will be particularly easy to clean.

In some cases, people want windows which don’t have muntins. The benefit of this, of course, is unobstructed views. You must also remember that windows aren’t just how you see the world–they’re how the world sees you. Windows do make a difference to your home’s facade, so spend some time thinking about which would suit yours best.

For a more on the specific types of windows styles available ( Double-Hung, Tilt and Turn etc.,) please click here.


Sound Transmission Class (STC) ratings are the measure by which we determine how something—in this case a window or a door—stops the flow of sound. When choosing windows for your home, it is important to take several things into consideration. For people whose homes are within earshot of traffic, car horns, low-flying airplanes, sirens, construction noise, or even loud neighbors, your home will be subject to much low-frequency (i.e. loud noises from a distance).

Many windows are unable to withstand such low-frequency noise. If that’s the case, then your window might only let it unwanted noise, but could also cause vibrations, too. In this instance, you would need a lower STC rating. When choosing windows, it is important to discuss your needs with whomever is designing and installing your windows.  Moreover, you should consider windows which have additional coatings and layers. This will ensure optimum sound-proofing.

For more on this, see this article.

Safety and Security

There are a variety of different glazing options available which will add additional safety and security to your home. The most important of these are laminated and tempered glass. 

Laminated glass is glass which has a very high breaking point. In fact, even after repeated heavy blows, the glass will not smash and shatter. Polyvinyl butyral, which is a strong resin, is used to bind tempered glass glass together to create a glass which is highly durable. It is often used in anti-burglary windows. Anti-burglary glass has a ranking system it uses to measure a window’s security. This is called its Resistance Class (RC) rating and it is graded from 1 (least secure) to 6 (most secure).

Tempered glass is up to four times stronger than regular glass. Unlike regular glass, it doesn’t crack. It smashes into very fine, granular pieces. This means that it is much less likely to cause damage if it shatters. Tempered glass is important for wherever there is a significant risk of someone falling—such as a shower, for example.

If you live in a coastal area, or an area in which you are at risk of storms or stormy weather, impact resistant glass is something you should consider for your home. Debris and other flying objects can cause serious harm and do serious damage if they make contact  with windows. Impact resistant glass contains laminated glass but will often also be tempered. Windows with this of kind of glass, designed specifically for high-risk environments, will also need more robust frames also for the necessary strength.

In terms of Decorative glass, tinted and frosted glass are popular choices for some. They are particularly popular choices for bathrooms, studies, or any room in which privacy (and light) is important. These types of glass can also add a flourish to doors.


Once You’ve Chosen Your Glass


To be clear, having double or triple glazed, thermally-broken windows, Low-E coatings, well-constructed IGUs, are very important factors when it comes to windows. However, it is imperative that you have licensed and certified specialists install your windows. This will ensure that they are properly installed and completely airtight, windproof, leakproof, and that there is sufficient weather-stripping. 

Similarly, it is equally important that your home’s insulation be as thorough as possible. Good windows can only be effective with good insulation, and vice versa.


Contact Us 

If you’d like to discuss this further, and learn more about the ideal type of windows for your environment, we’d be happy to give you a free consultation. Just give us a call on 718-403-0300 or email us at and someone from our team will be in touch.


Introducing: Open AWD’s Exclusive Custom-Made Furniture

Having originally started off as a seller of windows and doors, Open Architectural Windows and Doors has, over time, begun doing more and more bespoke work for its clients. From slimline railing systems, to custom-made furniture and specialized interior work such as fabricated medicine cabinets and even shower partitions, we have consistently provided unique products and services to meet the individual needs of everyone we work with. 

Often, many architects and homeowners we work with find that they need a product which simply doesn’t exist. Being problem-solvers, our goal has always been to ensure that we can help you, the client, come as close as possible to achieving your vision for your project. If we can help our customers create something unique, we will.

So, when a client recently asked us to design some custom made furniture for them, we were more than happy to offer our expertise and draw on our vast supply network to help them design a sideboard unit.

Check out the video below which details the ideas behind the design and the process.



Our Furniture Design Process

Sideboard Table

Our idea for the piece was to keep it as simple and as elegant as possible. We used the same approach we take with our windows and doors–elegant, minimalist design and slim sight lines. 

As you might imagine, the design process is slightly different from windows and doors. There are subtleties of furniture design which don’t exist with windows and doors, and vice versa.

On the other hand, however, there are many commonalities. At Open Architectural Windows and Doors, all of our work must adhere to three basic principles:

  • Elegance
  • Functionality
  • Performance

The minimalist principle of ‘less is more’ underpins all of our work so we wanted to create a piece with minimal, high-quality material, smooth lines and no visible welding. Ease of use and practicality were also integral to how we approached the project.

Working alongside the client, we were able to come up with a design which they felt perfectly captured their idea.


Below are some pictures of the production process which was handled by a furniture manufacturer according to our specifications.

Click to enlarge.


Click to enlarge.

Contact Us Today


So, if you’ve got an idea for custom-made furniture for your home, or would simply like to learn more about how we could help, please send us and email or give us a call today on 718-403-0300.

Open Architectural Windows and Doors can help you make your dreams a reality.


Landmark Windows and Doors: Everything You Need To Know About NYC’s Landmark Preservation Commission

NYC Landmarks Preservation Logo


As anyone who has ever spent some time in New York can tell you, the city is constantly changing. From one year to the next, companies come and go, old buildings fall and new ones rise. Each city block tells a thousand stories, and each year, the cityscape continues to evolve. This is because change is a crucial part of what makes New York one of the most innovative and remarkable cities in the world.

It’s a simple fact that a constantly-changing cities risk losing some of their identity. This is particularly true in a city such as New York, whose identity is bound up in its buildings. Thankfully, there are laws in place which regulate the renovation or restoration of buildings which have been designated landmark status. The authority is known as the Landmark Preservation Commission. If you’re considering landmark windows and doors for your home, make sure you read all of this for tips on the process.


A Brief History of the New York Landmark Preservation Movement


Landmark windows and doors.

The New York City Landmark Preservation Commission was established in 1965 at the urging of then mayor, Robert F. Wagner. Mayor Wagner wanted a system in place to stop the destruction of culturally, historically, or architecturally significant buildings. Though similar movements stretched back as far as the nineteenth century, it was only after the demolition of the original Pennsylvania Station (in order to make way for Madison Square Garden) that a series of laws were put in place to ensure that the rich, storied history of New York and its architecture could be preserved for future generations.

The establishment of the LPC was widely seen as one of the most important steps in creating a framework for promoting the unique architecture you still see in New York City. The city’s architecture is one of its most important assets. Tourists from around the world come just to see it.

Image: Pennsylvania Station (circa 1910s) courtesy of Wikipedia


What Falls Under The Remit Of The NYC LPC?


Map of NYC landmark districts.

It might surprise you to learn that, according to the Landmarks Preservation Commission, there are over “37,000 landmark properties in New York City. Most of which are located in 149 historic districts and historic district extensions in all five boroughs.” This includes entire historic districts, (e.g. South Street Seaport District), interior landmarks (e.g. The Rose Reading Room at the New York Public Library), and scenic landmarks (e.g. Central Park).

A quick look at the map should give you a sense of just how many landmarks there are in the city.

For a full list of the landmarks, and to see if your property falls within a historic district, you can explore the interactive map here.

Image: Map of NYC Landmarks courtesy of LPC



Stipulations Regarding Landmark Windows and Doors


Properties and districts which fall under the remit of the Landmarks Preservation Commission are subject to stringent guidelines. Because of the rules and regulations, landmark windows and door projects can be some of the most time-consuming and laborious projects.

As a result of this, very few contractors are actually prepared, or even equipped, to carry out the work needed on landmark windows and doors. Between permits, paperwork, and red-tape involved, it can be easy to become overwhelmed and for the project to lose momentum.

However, with careful planning, and by only employing contractors who know what they’re doing, you can easily complete your project with everything up-to-code. Violations of Landmark Laws can come with heavy fines for property owners.

How Good Window and Doors Contractors Navigate Landmark Projects


Landmark restoration projects are delicate and time-consuming tasks. These buildings were designated landmark for a reason–often because of their beauty. A good contractor will seek to preserve the craftsmanship of the past and not only restore it, but update it with all of today’s technologies and materials.


The single-most important quality, before anything else,  is experience. If a contractor doesn’t know how to their due diligence, doesn’t understand the building code, or how to navigate the city’s labyrinthine permit process, then your project might run into some major problems.


A great deal of research needs to be done on each landmark restoration project before work can begin. For example, you will first need to look up the original plans for the building. Researching the original design will give you a better sense of what the building, and often the entire district, originally looked like.

Architectural Adjustments

Working with an architect, you can then have drawings of any proposed work drawn up. You should indicate any and all changes you propose to make to the facade or interior.

Submitting Your Proposal

Before you can begin your work, the Landmarks Preservation Commission stipulates that you must first submit all architectural plans to them for approval. The LPC allows for a margin of error of roughly 5% with regards to the details. This means that they require you to stick very closely to the building’s original plans. 

Improving Upon The Past

Once the LPC approves your project, work can begin. It is very important to use all available modern construction technologies to improve upon the the existing landmark windows and doors. This includes, but is not limited to:

  • Using high-quality materials for restoring brick or plaster work.
  • Ensuring that any facades of new windows and doors are absolutely airtight, waterproof, soundproof, and wind-resistant.
  • Using innovative and thermally efficient insulation.
  • Making use of well-designed modern locking systems.


Our Work 


300 East 5th Street, Manhattan’s East Village


Exterior shot of 300 East 5th Street landmark windows

Open Architectural Windows and Doors have worked on multiple  landmark restoration projects. The most recent of which are 300 East. 5th Street, in Manhattan’s East Village, and a property on Vanderbilt Avenue in Brooklyn.

To give you a sense of what work on a designated landmark building entails, here is a short run through of the restoration process of 300 East 5th, in Manhattan’s East Village. In 2019, Open AWD, working alongside the architect, replaced the entire facade. This included windows, doors, and all of the ornate brickwork and cornices. The previous owner had carelessly covered over all of it with inexpensive siding and concrete. As you can see from the picture below, they had turned it into a mess. They had effectively removed all evidence of the building’s former beauty. Having been built in 1874, the building had, over time, grown uglier and had come to look severely dated. All installation work was carried out by trained and licensed specialists.

You can see a ‘before’ and ‘after’ picture’ below.





Vanderbilt Avene, Fort Greene, Brooklyn


Exterior shot of building's front elevation.

This Queen-Anne style carriage house on Vanderbilt Avenue in the Fort Greene neighborhood in Brooklyn was one of the most stunning and unique landmark restoration projects we got to be a part of. Built originally to house horses and coachmen, the building later became the Brooklyn Veterinary Hospital before being transformed into the bespoke home you see today. We used simulated double-hung windows and designed an oversized, arched entry door with fixed panels. Because we used triple-glazed windows, we opted for heavy-duty German hinges to ensure that the doors could take all of the weight. The sash can hold up to 650 lbs per sash.

We also recreated a stunning ocular window on the building’s first floor and designed striking, arched steel doors on the rear elevation. All installation work was carried out by trained and licensed specialists.






Greene Street, SoHo, Manhattan


Photograph of 10 Greene Street showing its windows

We were also delighted to be a part of another landmark windows and doors project on Greene Street. Greene Street is located in in SoHo’s Cast Iron District in Lower Manhattan.

John B Snook, one of New York City’s most esteemed architects, originally designed the building over a century and a half ago. 10 Greene Street features typical, double-hung windows, and three classic, solid wooden doors on its first floor.

We redesigned and replaced each of the building’s 39 windows with more modern and efficient windows. We used custom-made brickmold to help us stay closer to the building’s historic look. Similarly, we carefully reproduced the design on the classic wooden doors on the first floor. All installation work was carried out by trained and licensed specialists.

Click on the images below to enlarge and see some of the details and drawings.




Contact Us Today


Photograph of black, wooden entry door.

Even if you don’t own a landmark designated property, we can still help you. Some people hire contractors with extensive landmark restoration experience. This is particularly true where accents or ornamental work are concerned. We have worked brownstone buildings, for example, which aren’t landmark. They do, however, require much of the same attention to detail as landmark properties.

Open AWD has worked with many homeowners and architects who wanted to achieve a certain look. There are a variety of different options we can provide that would help lend a distinguished look to your home. If you would like to learn more about landmark restoration projects, call us on 718-403-0300 or email us here. We’d be delighted to discuss your ideas with you.

The Top Five Advantages of Tilt and Turn Windows

Picture of a slimline tilt and turn window.

Tilt and Turn windows are perhaps the most versatile, functional, and aesthetically pleasing of all contemporary window types. Having been standard in Europe for some time now, the popularity of Tilt and Turn windows is increasing across America.

In addition to being very elegant, they’re very versatile windows. They feature a hinge mechanism which allows them to be opened two ways: turned inwards, like a casement window, or tilted so that the top of the window is angled into the room. The tilt option provides an opening for ventilation and also has the added benefit of increased airtightness and security.

Before we look at their unique benefits, we’ll quickly explain exactly how they work.

How Tilt and Turn Windows Work

Equipped with profile cylinders, Tilt and Turn windows have a free-wheel function integrated into their handles. This allows them to move seamlessly between the closed and tilt positions. In its closed position, pointing south, the handle has a 180-degree range of movement. At 90 degrees, the ‘turn’ position, the window can be opened inward, like a casement window. At 180 degrees, or facing upward, the window is in its tilt position, which means simply tilts inwards. Now, let’s see what this means for your home.

1 Optimum Window Ventilation

Profile of slimline, open window.

One of the biggest benefits of Tilt and Turn windows are the varied types of ventilation possible. As mentioned above, with Sliding or Double-Hung windows you lack the precision and control which Tilt and Turn windows provide. With two different ways of opening—tilting and turning—you can determine just how much air enters your home, helping you to cut down on energy costs. Another excellent benefit of these windows is that in the ’tilt’ position, cool air can enter your home, but rain cannot.

2 Airtight and Energy Efficient

Tilt and Turn windows are an incredible 10-30 times more airtight than standard double hung windows found in most American homes. Excellent design, robust locking points, and more efficient air seals prevent air and water infiltrating your home. This minimizes potential or unexpected damage associated with wind or rain. Airtight windows also help reduce unwanted heat loss and complement the performance of your HVAC (Heating, Ventilation and Air Conditioning) system. This means that your home will be significantly more energy efficient. These windows make an excellent choice where energy consumption is a concern, and a perfect choice for passive houses.

3 Excellent Soundproofing

Soundproofing is one of the most important (and often neglected) aspects of window design. Because sound travels through the air, it is important to get windows which will form an effective barrier against sound coming into your home.

Due to increased airtightness and the possibility to use triple-glazed panels, this window system often have much better soundproofing. For reference, with the correct component configuration, sound attenuation comparable to a concrete wall can be achieved with these windows.

3 Maximum Security

Tilt and Turn windows have a multi-point locking system. This means that there are multiple locking point situated within the frame. While this allows for the windows to be locked in the ’tilt’ and ‘turn’ positions, the robust internal mechanism affords the window greater security. These features significantly decrease the chances of a burglar breaking into your home via your windows.

With greater security comes greater possibilities. Because of these additional locking mechanisms, it is much easier to create more secure, oversized Tilt and Turn windows. Unlike Sliding or Double Hung windows, Tilt and Turn windows manage to be secure AND provide maximum ventilation.

4 Make The Most of Natural Light with Oversized Units

Due to their above average load-bearing capacity, Tilt and Turn windows work exceptionally well as oversized units. Thanks to their design, the windows can withstand up to an unbelievable 550lb in the ’tilt’ position. Most other systems are simply unable to handle comparable loads and so must be made at standard sizes. Anything more could compromise their structural integrity.

Oversized window units can add a dramatic effect to your home’s facade. Some of the many benefits of oversized window units include unobstructed views, maximized natural light as well as added solar heat gain. With more glass on display, your home will naturally benefit from the sun’s rays.

5 Maintenance

Tilt and Turn windows are also easier to maintain than most other window types. By opening and tilting inwards, Tilt and Turn windows can be cleaned much more easily and safely than other windows. and much more safely than other windows.

Because they often lack a partition in the center, the unbroken surface area makes it easier to clean the panes. No need to risk to climbing up on a ladder or paying a small fortune for a window-cleaner.

Find Out More

If you would like to find out more about how Tilt and Turn windows can benefit your home, contact us today at 718-403-0300 or email us here and someone from our team would be happy to talk you through it!

Designing the Perfect Entry Door

Photograph of black, wooden entry door.

Deciding on an entry door for your home can be one of the most important choices you have to make for your home. Although some people might think of doors as simply functional components of a home, they are much more than that. Doors are an integral part of any home’s exterior. The first thing people notice as they enter your home, doors greatly contribute to a first impression and the overall feeling of a space.

With so many different materials and styles to choose from, it can be hard to know you’re choosing the right one. You will need to consider the type of door, the materials, what you need it to do, whether it is safe and secure, and that it will perform well.  The ideal door for your home, then,  will be a perfect marriage of functionality and aesthetics, carefully tailored to your unique needs. If you’ve gone to all the trouble of designing and decorating your perfect home, why settle for a less than perfect door. 

Choosing The Right Material For Your Entry Door

The materials you choose for your front door will greatly determine how safe, secure, weather-resistant, and durable your door will be. Choosing the material is a crucial step when considering purchasing a door for your home. Doors make a dramatic difference to the appearance of your home and, more importantly, how you feel about the way it looks. We’ll first look at some of the different materials you can choose for your door and figure out which might be the perfect fit for your home.


Vanderbilt Avenue Entry Door

There is a reason the popularity of wooden doors has remained undimmed for thousands of years. They are the most traditional and timeless choice and their beauty is often unsurpassed. Apart from being aesthetically pleasing, advances in technology now mean that wooden doors are now as efficient and durable as more contemporary materials such as aluminum, composites, and other materials.

Ornate accents are often added to wooden entry doors in order to complement or add a flourish to the facade. Although there is a level of upkeep in wooden entry doors, finished and treated properly, they can last a lifetime. Wooden entry doors are perfect if you would like to make a statement.

Some of our most popular choices include:

  • Oak 
  • Teak
  • Mahogany
  • Birch
  • Fir
  • Maple
  • Cherry
  • Ash
  • Scandinavian Pine

Click to enlarge.



beautiful villa.

Beloved for their versatility and strength, steel doors are the sturdiest, most fire-resistant, most secure, and most long lasting doors available on the market. In addition to this, steel doors offer exceptional thermal performance thanks to their thermal break. This means that they both retain the heat and keep the cold out, allowing you to keep the heat in your home at the optimal level for comfort. 

Another major factor in steel’s increasing popularity is its strength. Unlike with the most popular and widely used material (wood), it is possible to have exceptionally thin sight-lines with steel doors. Steel’s natural strength means that it can be both exceptionally slim and robust. The combination of slimness and added security is simply not possible in wooden doors.  

Finally, with steel, you also have a significantly higher degree of customizability. You can choose from different frame thicknesses, high-performance glass, improved weather-stripping, as well as a range of factory-applied finishes. It is precisely for these reasons that steel doors have become an increasingly popular choice for homeowners searching to add a modern or contemporary flourish to their exterior facade.

Here at Open AWD, we are happy to provide you with the following steel doors:

  • Galvanized Steel
  • Stainless Steel
  • Corten Steel



photograph of copper-clad entry doors.

An increasingly popular choice, cladded doors give you and your home the best of both worlds. Our cladded doors are available in a wide variety of different materials such as bronze, copper, and aluminum. With cladded doors, the wooden door frame is supported by a robust frame, designed with a metal of your choice. The wooden interior provides all of the natural beauty of wood while, on the exterior, a weather-resistant metal offers additional strength and durability. Cladding ensures that the door needs little or no maintenance and will be watertight and perfect for all seasons. Cladding is also a popular choice for sliding doors.

As pictured here, copper-clad is an exceptionally elegant choice. This style means that all of copper’s natural beauty is visible on the exterior for everyone to see, and the natural warmth of wood is present on the interior. Copper, much like bronze, is a metal which ages very gracefully. This means that the facade on your building will take on a beautiful bluish-green patina which only gets more beautiful over time. This, combined with the fact it is resistant to saltwater, makes it a perfect choice for those with an oceanfront property.

Our most popular cladded doors:

  • Aluminum-clad
  • Wood-clad
  • Copper-clad


Putting The Finishing Touches on Your Entry Door


As the revered modernist architect, Ludwig Mies van der Rohe, once said, “God is in the details.” It’s the little things which seem at once simple, but are in fact ornate and beautiful, which separate a good entry door from a great one. Once you’ve chosen your material, you must then begin considering the finer elements. These include decorative accents, handles, and additional safety and security features.



accents on copper clad entry doors.

Now that you’ve chosen the type of your material, you must consider how you would like your door to look. Entry doors are a perfect place to add a few finishing touches such as bespoke accents. here are a wide range of elegant accents which you can add to your door.

Details such as accents on doors say a lot about a home and its owners. Accents are a great place to add a flourish which complements the rest of your facade. They are, for instance, your only opportunity to add a decorative glass element to your facade.

Our team would be delighted to talk through your ideas with you, show you examples, and help you create the perfect entry door for your home.



Door Handles

Silver square door handle

After accents, doors handles and door knobs are components which must be carefully considered. It is important to choose a handle or a knob that will match, or at least complement, the aesthetics of your entry door and facade.

While handles are certainly a much more popular choice, knobs are popular amongst those with classic-looking, wooden entry doors. Bronze, copper, and brass remain the most popular choices for door knobs. Also, it is a little known fact that these metals contain antimicrobial properties. This means that they can actually help kill any germs which may be on your handle in a few hours.

If you’re looking for something more modern, steel handles might be a better fit. There are an endless variety of steel door handles available depending on the style of your home. You can learn more about the types of handles, knobs, and knockers we use here. Whatever your needs, we’ve got a huge selection to choose from.

Increased Safety and Security

Image of a high security door.

A great entry door amounts to very little if it is not safe and secure. If you have gone to the trouble of installing a beautiful new entry door, you must ensure that it can keep intruders out.

There are a number of things to consider here. For example, the material you choose for your door will have an impact on the safety and security of your home. Metal doors, in general, are of course stronger than wooden or composite doors. 

If you opt to have glass in your entry door, make sure to discuss your options to have the glazing reinforced so that it can withstand any attempted break-ins. Glass, while being beautiful, provides intruders with an easier entry point into your home. There are a number of ways to increase the security of your home via your entry door.

Most importantly, an entry door should have a good, multipoint locking system. This means that the top, middle, and bottom of the door can be locked with the turn of a key or the push of a button. Here at Open AWD, we use expertly designed multipoint locking systems from our European manufacturers.

Additional features such as security sets, extra secure hinges, and other anti-burglary fittings can be installed. Each of these additional features will increase the overall Resistance Class (RC) Rating of your entry door.

Locking systems are an equally important component of choosing the right entry door. It is important to consider which type of locking system would be most beneficial for your needs. For many, this will mean a traditional lock and key. For others, however, electronic lock (also known as keyless entry) might suit their needs better.

Contact Us

To discuss your options with one of our project managers, give us a call today or drop us an email. Whatever your needs, OPEN AWD has the right entry door for you.

Introducing: Open AWD’s Ultra Slim Sliding Door Systems

Photo of house with slimline sliding system .

One of the eternal problems within modern architecture has been the quest for slimmer and slimmer sight lines. For a variety of reasons, ultra slim profiles are not always possible to achieve, particularly in sliding door systems. One of the main reasons is that the slimmer the frame, the less overall structural integrity the door will have. This issue becomes even more important when you take operable parts into consideration.

So, after much researching, testing, and modeling, Open Architectural Windows and Doors is very excited to announce the launch of our latest range of state-of-the-art sliding door systems. We will be offering two ultra-slim wood-aluminum and aluminum sliding doors, the OPEN m40 and the OPEN s26a. All of our windows and doors are sourced from first-rate European manufacturers.

Both systems have been designed with some of the slimmest profiles possible to achieve with sliding door systems—1” aluminum, and 1¾” for wood-aluminum. As a result of this, your sliding door will be completely flush with the wall. No lip, no threshold, just slim, elegant sight lines.

Both systems have been tested in Europe and testing is currently underway in the US.

OPEN m40

Open m40

Our new and elegant sliding door system, the OPEN m40, is comprised of cladded wood-aluminum. Its beautiful 1¾” wooden frame contains a robust, supporting internal aluminum frame. The wooden exterior provides all of the natural beauty of wood while aluminum offers additional strength and durability. As a result of this, the aluminum cladding will ensure that the door needs little or no maintenance and will be watertight and perfect for all seasons.

Other Highlights Include:

  • Elegant selection of woods and finishes to choose from.
  • Sound Transmission Class rating of 43.
  • Glass is tempered and finished with a low-e heat retention coating.
  • Offers excellent security and fire resistance.
  • Three weather gasket planes with continuous, one-piece full-perimeter weather gaskets.

Click to view images.

OPEN s26a

Our other new aluminum sliding door system, Open S-26a, has an exceptionally slim visible section of just 25mm. This minimalist system is particularly well suited to oversized panels (up to 12ft x 10ft). The Open S-26a also has exceptional thermal and acoustic performance ratings. The reinforced, stainless steel rolling area allows for a smoother and easier sliding movement.

Other Highlights Include:

  • Sound Transmission Class rating of 43.
  • Glass is tempered and finished with a low-e heat retention coating.
  • Offers excellent security and fire resistance.
  • Possible to join corner sashes at 90º without a mullion.
  • Available in standard RAL powder coating and in wood-effect.


No Threshold

cross section of sliding door without threshold

Our advanced new systems have eradicated the need for thresholds, ensuring elegant sight lines all round. This means that your home can blend seamlessly into your patio.

Innovative Locking System

Our concealed locking system means that there will be no bulky and unnecessary fittings visible on your sliding door. The locking systems have a corrosion resistant coating.

Flush With The Wall

Close up of the Open M-40 sliding door system.

With our new innovative system, our OPEN-m40 model boasts an exposed sash section of only 40mm. This ultra slim profile ensures that it can remain completely flush with the wall.

Slimmer Profile, More Glass and More Light

Open m40 Cross Section

A slimmer profile means more glass on display. More glass means more light and a brighter home. Furthermore, we are also offering oversize sliding doors with glass panels up to 12ft x 10ft. With our new models we can achieve up to 94% glass surface level.

U-Value and STC

U-Value Open m40
Our new systems boast a U-value of 0.16 up to 0.23 BTU/h∙ft²∙°F.

The systems have an impressive Sound Transmission Class (STC) rating of 43. This means that the windows will be exceptionally resistant to external sounds, minimizing sound pollution.

Unique Finishes and Maximum Comfort

Open s26aThe OPEN-m40 will be available in a variety of different woods. The OPEN-s26a is available in all standard RAL varieties of custom colors.

Open AWD can fit your new sliding doors with the most thermally efficient double or triple glazing available. So, not only will you cut down on energy bills, you will also ensures an optimal level of comfort inside your home.

Find Out More

If you would like to find out more about our new sliding doors, contact us today. Someone from our team would be happy to discuss your options further with you.

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