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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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How Sing Core supports contemporary architecture and brings original architectural doors to life.

Why Specify Sing Core?

The primary reason top architectural firms specify Sing Core in their specs is for large doors because every door over three-and-a-half ft. wide or seven ft. tall is going to have a problem with warping, and Sing Core is the only way to build an Eco-friendly lightweight high strength fully insulated door which can be

Guaranteed Warp-free for 50 Years

This sets the bar extremely high, and when architects want to deliver the best for their particular high-end clientele, as specifying “Sing Core inside” elevates the project to an entirely new level.

Renowned for non-warping large doors, inventor Peter Sing’s patented and patent-pending building materials can do so much more. Next up on the list of reasons why architects seek Sing’s materials out for their upcoming projects includes lightweight dimensional stability and unsupported spans.

Here, Sing stands amidst a 13 ft. one-inch thick panel between two sawhorses, and you know if he were standing on any other building material, he would be standing on the ground. Yet, there he is suspended with little or no deflection. It boggles the mind, the possibilities of Sing’s core.

And Sing’s factory, located in the pristine forest region of the Pacific Northwest builds more than panels. He also builds posts and beams for use in other types of construction applications, which are just as lightweight and strong, if not stronger.

How Strong is Sing’s Core?

Independently tested, Sing’s core is 660 PSI, many times stronger when compared to any other lightweight honeycomb-type building material which usually clocks in at between 10 and 110 PSI.

That’s why you will find Sing Core inside impact doors. Sing says, “If you kick other doors, they will crash,

“Kick my door and you will break your leg.”

While lightweight and fully insulated, Sing Core is stronger that steel pound for pound.


Architectural Lamination

When it comes to architectural designs using high precision lamination, Sing’s factory and his high precision laminating specialists provide top of the line results with unparalleled visual impact.

Laminates can be mixed and matched in any specified pattern, orientation, or specific shapes. In fact, Sing’s stile and rail surface lamination makes his high-end door blanks look like a high precision stile and rail door, for which he is well known for in the industry.

Sing’s lamination is also included in his no-fail 50-year guarantee.

Any Surface Material

Due to Sing’s True Flat Team’s ability to keep any surface material straight and true, you will find them constantly hard at work designing the warp-free components to keep solid wood stave straight and true for 50 years, though their expertise is not limited to unstable wood grains.


Nearly any available flat building material can be incorporated with Sing’s core, including exotic natural wood grains, aluminum, brass, brick, bronze, cement, cold rolled steel, concrete, diamond plate steel, fiberglass, Formica, FRP, galvanized steel, hot rolled steel, HPL, Kevlar, Masonite, or stainless steel, just to name a few. That should get your creative juices flowing.

But there’s more

Any Size

Due to the incredible light weight of Sing Core and super strong resilience, the largest doors in the tallest buildings in the United States are built with Sing Core inside.


us-navy-singcoreThe last thing you want on the top floor of the World Trade Center, is a warped door, and that’s why you’ll find Sing Core inside those doors.

You could find Sing Core from beneath the depths of the sea (US Navy) to outer space (NASA) and everywhere in between.

Any Application

There’s no doubt you will find Sing Core inside the finest oversized large doors, but you may find Sing’s core inside any item that is lighter in weight but expected to be used over and over again over a long life span.


You will find Sing Core inside 100-year furniture (that’s furniture that is designed and built to last for a hundred years). This is in stark contrast to more popular inexpensive import furniture which is expected to be basically disposable.

You will discover new and varied ways to use Sing’s patented and patent-pending technologies for signage, floors, walls, ceilings, emergency shelters, modular work sheds, tiny houses, museum displays, store fixtures, and modular trade show booths which are designed to be knocked down and rebuilt over and over again for years on end.

A variety of travel industries are benefited by using Sing’s technologies, including, but not limited to hospitality, aircraft, aerospace, marine, rail, trucks, trailers, and RVs.


Even entire homes have built of Sing’s patented Sing Core.

See a wide range of Sing Applications.


Most Sustainability of Any Other Building Material

Peter Sing’s gift to the world is this highly sustainable product which can virtually last forever with little or no deterioration, and can be repurposed on the fly, making it possibly the most sustainable building material in the world.

Shouldn’t you be specifying Sing Core inside your most important projects?