Did you know you can get your custom super large door substrate in 1 week? It’s true, thanks to inventor Peter Sing’s patented and patent-pending large, oversized door core technologies and his factory that is 100% dedicated to manufacturing nothing but large doors for you and your clients, you can get these enormous door blanks created in as little as 1 week. This is an unprecedented turnaround time and also comes backed by Sing’s full warp-free and structure guarantee for 50 years. You won’t see an offer like this anywhere else in the door industry.

Are You Getting Tired of Being Disrespected and Given Long Lead Times for Big Doors?


Now you don’t have to wait around for long lead times, as much as seven or eight months to get going on your project when you are waiting on the most important part, that big door.

How Sing Core is Included in Your Project

Often the Architect specifies Sing Core in your challenge, large, curved, arched, or specialized surface skinned door. In other cases, the door manufacturer or the millwork building the door says,

“There’s only one way to make this door: 

with Sing Core inside.”

And they are right. Peter Sing’s inventions are the only known methods of producing a lightweight, high strength, fully insulated door blank that will not warp, bend, twist, cup, delaminate, or otherwise fail, and can be guaranteed to remain fail-free for 50 years.

Can I Get a Door from Sing Core?

Sing Core does not make doors, but we help door manufacturers and millwork make the best doors with our patented and patent-pending technologies as the foundation.

The Door makers use our substrates as the base material to create their one-of-a-kind works of art that our clients have learned to appreciate and enjoy. It takes a concerted effort of Sing’s True Flat Team, assisting in the design and creation or the door and the highly skilled door builders and millworks to finish and bring these beautiful doors to life.

What Does Sing Core Do?

We provide the lightweight, high strength, non-warp door blanks with fast delivery so your big door does not have to hold up your production time. Our True Flat Team helps to design the core material from the inside out, takin into consideration all the specifics necessary to create a warp-free door.

What Does Sing Core Need to Know?

There are many details about the door that go into the building of the door’s substrate that Sing’s True Flat Team needs to know before they can go about building the substrate. First, and most obvious, is the size of the door. Doors over 8 ft. tall start to introduce challenges into the design. Then there is the door type. Will it be a pivot door, hinge door, sliding door, or other type of door? Where, geographically, will the door be installed? Will it be an exterior door? Will it face the elements or be isolated? What surface material is desired (some provide more challenges than others), and much more. With data in-hand the team can develop a warrantable substrate.

How Fast Can Sing Core Do It?

We can have your custom substrate ready for the manufacturer to finish in as little as 1 week, and we answer this call by clients who would rather not wait for our standard turnaround time which is four to eight weeks.

What Does the Door Mfg. Do?

We provide the fail-free door blank to the manufacturer (door builder or millwork) who cuts lite openings and hardware access locations in the door, installs glass if specified, hardware, finishes, and hangs the door. The door manufacturer or Sing Core (or a combination of them both) may be responsible for applying the final layer(s) of skin material.

How Easy is it to Get a Price Quote?

It’s as easy as 1, 2, 3. Within minutes you can submit a price quote for your specialty door, and instantly see a 3-D graphic or your proposed door and a preliminary architectural drawing of your door instantly. All you need is the length, width, and thickness of the door you want and what skin you would like to see on your door. (See How to Order and What to Expect)

How Can I Get a Door with Sing Core?

The easiest way is to have your architect specify a Sing Core door in your project. Other ways include contacting your custom door manufacturer or millwork and requesting that they build your door with Sing Core inside.

Can You Guarantee Any Door for 50 Years?

Unfortunately, we cannot guarantee any door for 50 years. If the door cannot be built to specs and guaranteed for 50 years, we will not participate in the building of that door in that respect. But if the architects, designers, and engineers can work with Sing’s True Flat Team, with a little re-engineering and ingenuity, it is highly likely that Sing Core can help to produce a door that can be guaranteed for 50 years.