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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.