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Architectural Door Definition

Architectural Door Definition

An architectural door is one that is designed by an architect with a particular form, function, and aesthetic feel to it that might appear as though it were solid wood, metal, stone, opaque glass, or other natural or manmade material. An architectural door consists of an architectural panel designed and finished according to the architectural specifications, articulating with hardware to provide access or hide and reveal specific features or locations in or around a structure for a distinct application.

Advanced technologies offer nearly unlimited opportunities for architects to let their creative abilities to flourish in the architectural door arena, as projects that were restricted by the limitations of certain building materials can now be overcome by composite and hybrid technologies.

Now, door architectural doors can be made of nearly any material or in any size without having to compromise the architectural door’s integrity. Architectural doors can be made to be lighter in weight, much stronger, with higher precision, insulated, and guaranteed not to warp, twist, cup, or otherwise fail (including structure and lamination) for up to 50 years.

Architects are no longer limited by archaic rules and limitations, thanks to new and emerging technologies such as patented Sing Core substrate which empowers door designers to imagine and create doors of magnificent proportions without having to account for weighty or flexible building materials.

Architectural doors can cow feature the following raw materials:

Non-rigid Architectural Door Materials

When creating an architectural door, there is a tendency to use materials which are not customarily used in various combinations in a large oversized front door design. The larger the door the less rigidity these materials may have.

Natural Wood

Natural wood is the most problematic substance to include in any large modern architectural design due to its tendency to move in accordance with environmental changes. Thanks to inventor Peter Sing’s patented Sing Core and patent-pending anti-warp technologies, his True Flat Team can assist in creating the prefect warp-free substrate which can be engineered to counteract almost any surface materials propensity to move, keeping the architectural door straight and true regardless of size.

Heavy Architectural Door Materials

Building an oversized architectural door using heavy materials such as concrete, steel, lead, stone, brick and mortar, and the like can be hugely challenging due to the excessive weight. The bigger the door, the more weight, stress and strain on the structure when operating such a monumental architectural door.

Again, Sing’s invention provides a high-precision lightweight substrate which can unfailingly support the weight of heavy architectural materials, and support the materials exceedingly well, while remaining lighter in weight, and can also be guaranteed not to fail for 50 years.

How Is It Possible?

You might ask yourself how this new patented technology can make the previously impossible large architectural door designs possible in present day? Sing’s patent holds the answer.

Peter Sing’s revolutionary patent is based on a hybrid combination of old and new technologies to create a lightweight architectural composite substrate that is stronger than steel pound-for-pound.

He starts with a torsion box grid structure using vertical grain natural wood fiber to form small grids two to three inches, then fills the otherwise empty structure cells with rigid foam material and sandwiches the metric structure between two sheet goods to complete the reinforced structural insulated hybrid panel.

This is the revolutionary core technology that has revolutionized the architectural door market across the board.

That’s why more and more architects are specifying Sing Core Doors in their most prestigious contemporary architectural design projects.

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Why Architects Spec Sing Core

Why Do Architects Spec Sing Core?

16 ft. teak wood pivot front door in billionaire's home with Sing Core inside

16 ft tall architectural teak door


In order of importance:

The number one reason architects specify Sing Core is for oversized doors of all kinds.


Any door over seven ft. tall and three-and-a-half ft. wide is going to have a problem with warping. Having Sing Core inside is the only know way to make a lightweight, high-strength door that can be guaranteed not to warp and includes a full structure and lamination warranty for 50 years.

warp-free 9 ft tall walnut veneer architectural door lightweight high strength insulated 50 year guarantee

9 ft tall warp-free walnut veneer door with Sing Core inside


Beauty is not only Skin Deep

If it’s an available flat surface material, Sing Core has the expertise to apply it to patented and patent pending Sing Core technology in a superior high precision manner which will not delaminate following proper finishing.



Wood veneer is the popular choice for use in architectural doors. Application of veneers in large door projects can be very tricky, and Sing Core utilizes the most advanced comprehensive lamination methods to laminate large veneer doors.

highest precision .020 walnut veneer on Sing Core (tolerance +/- .006 in.) the bigger the better

Perfectly smooth walnut veneer


Applying solid wood stave (natural wood grain planks) is the hardest material to feature on large doors due to the wood grain’s nature to shift and change in response to changes in the environment. It is hard enough to keep a standard sized wood plank door straight but building an oversized wood stave door is exponentially more problematic, unless it has Sing Core inside.

warp free wood stave sliding door 25 ft. long wire brushed white oak insulated 50 yr guarantee

25 ft. wide wire brushed white oak wood stave sliding door


Sing Core has a unique method using their patented and patent-pending technologies to create the first super smooth high-precision MDF surface area that will not warp. This “smooth as glass” material is ready to paint, add vinyl graphics, or other materials such as veneers or wood stave via cold press in your own shop or millwork. Hot-press-ready version also available. We know how to do it. Just spec it and see for yourself.


20G steel is the most popular grade of steel used on architectural steel doors with Sing Core inside. Why 20-gauge steel? Because even though Sing Core is lightweight it is stronger than steel pound for pound. That means you can use a lighter weight steel, without compromising the door’s integrity or visual appeal. Most popular steels are cold rolled steel, hot rolled steel, galvanized steel, stainless steel, and diamond plate steel, among others.

lightweight hot rolled steel sliding door with sing core inside stronger than steel pound per pound

Lightweight high strength hot rolled steel slider easy open & close


The most popular synthetics used on architectural doors are FRP, Masonite, Formica, fiberglass, and acrylic. The lamination experts at Sing Core know exactly how to deal with these hybrid and synthetic materials to qualify them for their 50-year fail-free guarantee.

lightweight high strength teak Formica large sliding door 50 year warp free and lamination guarantee

Large insulated impact resistant Formica door for added safety and security


The less expensive yet durable metal skin, aluminum or aluminium is an excellent choice of architectural door skin, and as with steel and other metal doors skins, thinner is better due to the high precision and superior strength of Sing Core.

Note: All door skins have exponentially increased adhesion, as the surface area increases, so does the bonding agent, due to Sing Core’s true flat nature and high precision at +/- .006 in. tolerance. Other honeycomb cores, like aluminum core, is only +/- .03 tolerance, and has very minimal surface area for adhesion, whereas Sing Core is solid surface.

insulated aluminum sliding patio doors stronger than steel superior climate control 50 yr guarantee

Insulated aluminum sliding patio doors for added climate control


Sing Core is a high precision solid surface substrate material sporting .006 tolerances. It is this degree of precision which is necessary, along with extensive proprietary knowledge and patent-pending anti-warp materials, to create the high definition bonding which is necessary to join and two flat surfaces with unsurpassed results. This enables Sing Core to create laminated panels, posts and beams which are created to last for centuries without failure.

What happens if you don’t specify Sing Core inside your doors?

IF YOU DON’T SPECIFY SING CORE inside your door, you are likely to get a heavy LVL door core, or if you specify “lightweight” you are likely to get an aluminum honeycomb door, which may look good on the outside and may hold up following installation, but not for long. Low tolerance (+/- .03 in.) and tendency to move are just too much of a sacrifice to make for discerning clients, like those who are increasingly looking to Sing Core to solve the problems associated with large oversized doors.

lightweight high presicion insulated large warehouse doors one finger push open ease 50 year sing core guarantee

One finger opens large warehouse doors with Sing Core inside


This is an added benefit enjoyed by contemporary architects who specify Sing Core inside their modern doors, but for those in search of insulated doors, this patented and fully insulated substrate is the only way to achieve lightweight high strength and superior insulation throughout for sound deadening and increased climate control.


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Architectural Flush Wood Door

Working hand in hand with architects, door engineers, designers, millworks, and custom door manufacturers to help create one of a kind architectural flush wood door works of art is the everyday activity that goes on inside inventor Peter Sing’s factory nestled safely within the pristine Pacific Northwest.

Yes, you can get an architecturally inspired standard flush wood door off the shelf, but that’s not the same as a real architectural flush wood door. An authentic architectural flush wood door is a wooden flush door that is highly prestigious and unique, unlike any other door. That is, unless, you are specifying 700 matching doors to synchronize and tie into the location’s aesthetic design. Still, they would be individually unique to that specific location.

Architectural doors are art. Just like you can get copies of art to hang on your wall, you can get copies of architectural flush wood doors to hang in your door opening, but the copy is not the same as the original, and a keen eye can tell the difference.

Some clientele would never settle for hanging art that wasn’t an original piece.

Architectural flush wood doors are comprised of many materials combined in unique ways to create a unique door that is unlike any other. An architectural door designer might mix different wood grains in a unique design pattern on the flush door’s surface to create such an individual work of art.

The architectural door artist may also combine different materials into the door’s design, such as, wood, metal, and glass. Other materials, such as aluminum, brick, cement, copper, fiberglass, hot rolled steel, laminates of all varieties, plastics, and stainless steel, just to name a few of the most popular.

The best architectural flush wood door is a composite of many materials, and nobody know the intricacies of precision bonding many different materials together, all working in unison of the whole, all the (and here’s the kicker) while,

Remaining Perfectly Straight for 50 Years

than inventor, Peter Sing, who provides his patented and patent-pending architectural flush wood door technologies which are revolutionizing the way architectural doors are made.

The biggest and best architectural wood doors are large oversized flush architectural grade commercial doors, that can be very large, up to 50 ft tall or wide. (That’s a big door.) As you may have guessed, especially if you have some experience with any doors which are oversized, that keeping it straight is going to be a problem.


Any large door, over 7 ft tall or three-and-a-half ft wide, is going to present a problem with moving over time and the problems are exponentially worse if you’re dealing with a natural wood grain door. Due to the nature of natural wood, it expands and contracts in accordance with changes in the environment which results in the door warping, bending, twisting, or cupping.

Left to its own devices, such a large door will be problematic for the end user, requiring regular maintenance to deal with its propensity to move. That is, unless it has

Sing Core Inside

Patented Sing Core enables all the greatest door companies in the world to build enormous doors which will remain warp-free, even if they are constructed of natural wood species.

10×12 ft 3″ thick warp-free 1/8″ oak 520 lbs

Of course, contemporary architecture and modern designers have resorted to using non-natural faux wood grain materials such as HPL to prevent the warping of architectural flush wood doors, but even so, those incredibly large doors still presented a problem with staying straight.

Sing’s patented and patent-pending warp-free door solutions along with the years of technical expertise of his True Flat Team, can help create high precisions architectural doors results unsurpassed by any previously available door-building technologies.

These new leading-edge door manufacturing processes and anti-warp materials are able to produce doors of any size, made of any flat building material (yes, even natural woods) which can be covered by Sing’s unprecedented,

50-year Warp-free Guarantee

All Sing’s premium flush wood doors are covered by his 50-year guarantee which covers any movement, as doors made with these technologies with not warp, bend, twist, cup, or otherwise fail (including structure and delamination) for 50 years.

No other company can offer such a guarantee on an Eco-friendly, lightweight, high-strength wooden flush door.

Added Architectural Benefits

Besides being warp-free and having the best and most long-lasting guarantee in the world, architectural doors that have sing Core inside also have many other extraordinary characteristics, such as

1. Lightweight

Architectural doors made with Sing Core inside are 1/3 the weight of other solid core doors manufactured with wood-based door cores. Creating doors so light in weight is extremely advantageous in reducing transportation and installation costs, as well as reducing the expense of heavy-duty architectural door hardware which is based on the weight of the door. A lighter weight door also translates to reduced maintenance costs related to regular door operation which if the door is heavier will increase stress and strain on both the structure and its hardware over time.

2. High Strength

No other Eco-friendly, lightweight door is stronger than an architectural door with Sing Core inside as these are the only doors which are stronger than steel pound for pound, independently architecturally rated by University at 660+PSI (many times stronger than commercial honeycombs used in aerospace at 10 to 110 PSI), making them the most sustainable doors known to man on planet Earth.

3. Fully Insulated

Even if your primary interest is having an architectural wood door that is straight and true, you might be pleasantly surprised that these are fully insulated for climate control (R 3.5 – R 6.5, or more, depending on architectural specs) and sport impressive sound deadening capabilities. It is not uncommon to find Sing Core inside the best soundproof doors in the most exclusive locations around the world in sound-controlled environments.

4. Solid as a Rock

One look at Sing’s site and you will see many demonstrations of just how strong his lightweight panels are. In one demonstration he is standing in the middle of a 13-foot-long 1-inch-thick panel suspended between two sawhorses with little or no deflection (any other panel would have you crashing to the ground). Another example shows two men standing amidst a 20-foot span. Sing says if you kick a standard stile and rail door, it will break, but,

“If you kick my door, you will break your leg”

first, before you break his door.

You should think about specifying Sing Core inside all your important architectural door projects.

Submit a price quote request today.

Architectural Wood Flush Door Photos


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High Precision Doors

Foam-Panel-Interior-Structural-Torsion-Box-Sing-Core-RevealedSing High Precision Doors are a marked improvement in door development, design and implementation thanks to a newly invented Eco-friendly core material that is lightweight, insulated and stronger than steel pound for pound.

This new technology is revolutionizing the door industry especially in regards to large oversize doors. Architects, designers, mill works and door manufacturers all experience problems with doors that are larger than normal size.

Large doors present a variety of challenges in areas, like:

  1. choice of available materials
  2. lightweight doors are weak and tend to fail
  3. Copper-Doorheavy doors strain hardware and structure
  4. increased regular maintenance
  5. failure due to warping

Sing High Precision Doors solve all these issues with an Eco-friendly insulated solution.

How high precision are Sing High Precision Doors?

Sing High Precision doors are created with so much accuracy that the original door slabs are perfectly flat within .0006 inch accuracy.

After applying your desired composite materials and/or skin, your high precision door can be laser CNC machined for a perfectly flat surface, limited only by the accuracy of your CNC machine shop capabilities.

The Large Challenge

Certainly, you could use laser CNC cutting and engraving to machine nearly any door made of almost any commonly used door material for a flat result. The challenge comes from standing the door upright and expecting a degree of effective usefulness over time.

lightweight high strength engineered plywood for making large sliding doors aluminumWhy Large Doors Fail

The effects of gravity, varying degrees of moisture and/or atmospheric change, and the natural limitations of the characteristics of the building materials that comprise the door all contribute to its failure. This causes dissatisfaction for the end user, who has invested a great deal of expense in the design, manufacture and installation of this specialty large door.

Door warping is the number one problem for oversized doors that are otherwise enjoyed by the most discriminating end users.

The Disappointment

No one wants to spend that kind of money on a door that is going to warp, bend, twist, delaminate or compromise the structure or hardware with normal recommended use.

Now, here’s the exciting part…

Sing High Precision Doors can be guaranteed not to warp, bend twist or otherwise fail for 50 years!

large-lightweight-high-strength-garage-carriage-doorsImagine having a large door that can be installed that will not pave the way for repeated service calls over the life of the door.

Take a look at some of our clients who trust us with those difficult door challenges because they are the most reputable high performers in the industry who only deliver the highest marks in terms of customer satisfaction, especially now that they can deliver a fail-free large door that will not cause frustration for their client’s or their service departments. See clients List.

Highest Precision in Doors


Click Image for True Flat

high precision doors laser accuracyNo other building material can be guaranteed to maintain a true flat surface and milled with laser precision for long-term maintenance-free performance for 50 years. This is why you can find the growing demand for the Sing solution from beneath the sea (US Navy) to outer space (NASA) and everywhere in between.

The high precision Sing solution is not just for doors; turned flat these very same Sing Panels can become floors, tables, counter tops, ceilings and roofs. Turned on their sides, these patented panels become walls, moveable partitions or virtually any other type of application.