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Current Trends Don’t Wait

This is an update to let you know what the current trends are, here at Sing Core.

The biggest trend is this:

Warped Doors… Help!

We have been getting a lot of calls from professionals who have installed large doors who are now in trouble because those doors warped. As you know, Sing Core is the only way to build a large door that does not warp, and we guarantee it for 50 years.

If you are in trouble and need that door right away, we can do it for you, but you will incur rush fees. You will be far better off by getting the door assistance from Sing Core in the first place.

Don’t wait. Let Sing Core save you the headache, lost time, and expense of having to replace that high-end door later. According to the reports of incoming requests, the large doors are having to be replaced within six months of the job’s completion. Don’t let this happen to you.

We Can Do It

When you work with Sing Core to help you make that big door, you are working with inventor Peter Sing’s True Flat Team that knows how to build warp-free doors. They have years of experience with all types of building materials and types of doors. They know what can be done, what cannot be done, and have patented and patent-pending technologies to make an otherwise potentially warped door, warp-free guaranteed.



Ordinary vs. High-end

This is the difference between an average door and a high-end door: Precision over time. Out of the gate, Sing’s door core sports +/- .006 in. tolerance which is the highest precision door core to start with. That’s not including all the anti-warp technologies that are available to the team to make sure your door does not warp over time.

Built to Your Specifications

We can solve the issues that you are facing with your door. We can make the door lightweight, no matter what the size, but if you need to match a weight requirement, we can help you achieve that as well. Your door with Sing Core inside can be built according to your specifications.

Some Other Trends We Are Seeing

Grooved Doors

Architectural doors with horizontal grooves appear to be all the rage. If you have been doing this for a while, you already know that routing kerfs, plow cuts, furrows, or V grooves is compromising the door’s structure and may lend to increasing the door’s tendency to warp, but not if it has Sing Core inside.


High precision 1/16″ groove in 1/8″ skin

We can pre-cut grooves, even deep grooves (we have a special process for extra deep grooves) for you, without jeopardizing your non-warping guarantee. If you are doing a high-end job, you should start with a high-end core, like Sing’s warp-free door core.

Curved Doors

Unlike arched doors, curved doors must be very exacting to match the curve of the structure in question. The last thing you want is for that door to move, rendering the door unusable. This is extremely important for curved doors, that they keep their shape consistent over time.

Sing Core can match any curvature in your perfectly curved door and guarantee maintaining is shape in longevity. Nobody else can do that and guarantee it for 50 years.

CNC Carved Doors

CNC carved doors are really being seen as on the increase. These doors can be rather large, and you will need enough wood (meat) to carve into, and there are varying landscapes being carved into the grain, which is an invitation to warpage.

To prevent future warping doors, these CNC artisans are making sure they have non-warping Sing Core inside, specially designed and reinforced to accommodate both the natural wood grain and the varying depths being carved throughout the door’s surface area.

How Can We Do It?

How can we consistently make the doors that are impossible for other door manufacturers to create? Because it’s all we do. We have been doing it for years and will do it for many more.

We are not saying that other companies cannot provide their clients with 50-year warp-free extraordinary doors, because we work with the biggest and best door companies to assure that they can give this level of service and precision to their clients. They trust us with giving them what they need to deliver their best to their best clients.

Let us help you deliver the best big doors to your best clients.


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Large Modular Non-warping Doors

New Garage Building Material frameless insulated torsion box panels from Lowes Home ImprovementAlways on the leading edge of large door technology, especially in terms of lightweight, high strength and say, “goodbye,” to your oversized warped door forever and enjoy your Sing solution in any size, type or style of door.

Challenges of Oversized Large Doors

When considering a door larger than normal (that might be referred to as an enormous door) many challenges arise for the architects, designers, millworks, builders and installers. Some of the most common problems associated with big doors include:

Warped Door

If the door is taller than seven feet tall and wider than four feet then the door will warp. Warped doors are a common occurrence associated with large doors. This can be annoying for the end user due to the constant maintenance calls required for dealing with the warping door (though it is good for the door service business).

Big Doors Are Heavy

If a door is large you are going to have a lot of weight to deal with. This excess weight causes many issues associated with the building, transporting, installing and maintenance of the door from inception and throughout the service life of the door.

Big Doors are Expensive

Heavy building materials require more time, manpower, resources and equipment to make the door and the result is a big door that is overweight. Heavy doors are expensive to deal with; expensive to crate, ship/transport, offload, finish, store and install.

Overweight doors require more expensive hardware, and the added stress on the frame and the structure requires more regular maintenance over time.

sitting on large 12 ft x 10 ft mahogany pivot door in factoryThe BIG DOOR Solution

Sing Core has been the top-rated guaranteed solution for large doors used by the best architects, millworks and door companies nationwide (see: clients list). In fact, Sing Core can deliver the only Eco-friendly lightweight, high-strength insulated large doors over seven feet tall and 4 feet wide that can be guaranteed to be true flat and stay flat for 50 years.

The only non-warping large door guaranteed not to warp, bend, twist, cup or otherwise fail for 50 years.

20 ft tall large non warping pivot door no more warped door

20 ft. Tall Door

Modular = Newest Development in Large Doors

Sing Core technology has advanced to a completely new level by introducing the modular large doors for combating even more challenges associated with large doors; by creating doors that are shipped as individual components and assembled on-site.

These extremely large doors would cost thousands of dollars to ship (if not impossible due to their large size) but if made in modular components, the large door can be shipped flat-packed and sent by traditional shipping methods reducing shipping costs tremendously. And, the resulting big door can still be guaranteed not to fail!

True Flat Technology Goes Modular

Long known for the largest non-warping doors, Sing Core takes modular huge doors to the next level while still making their 50 year non-warp guarantee. The components are shipped separately and assembled on-site for the biggest doors that can still be fully insulated, operable and manageable without the heavy maintenance required for other big doors. Many connection methods are available for these large door projects including making components using our T Slot Panels as individual components that can be perfectly aligned on site.

Free Large Door Consultation

Of course, building such a door up to 50 feet wide is an art in itself. Each door is designed for its intended purpose. Some of the questions our specialized doors creators ask might include: Will your large door be underwater, in outer space, exposed to extreme weather, need to be bullet-proof, waterproof or soundproof? Also, “What kind of door will you need?” A large sliding door, pivot door, French door or other type of door, etc…

Commercial trade professionals are encouraged to contact us for a Free Large Door Consultation, so that you, your clients and the world at large can know what it is like to own an non-warping large door of any size.

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How to Fix a Warped Door

Many people struggle with how to fix a warped door. Nothing is more frustrating than spending your hard-earned money on a nice door, only to have it warp, bend, twist or cup not long after installation.

This problem is magnified exponentially especially if the door is a large oversized door. Some of these high-end large doors can cost tens of thousands of dollars only to discover failure due to warp when the season changes. This can mean job security for door repair services, millworks and contractors serving the account, but can lead to dissatisfaction and frustration for the client.

Patented Sing Core

Patented Sing Core

Dealing with how to fix warped wood doors is considered standard maintenance for high-end applications; that was until the invention of patented Sing Core. Only large oversized wood doors made of Sing Core can be guaranteed true flat – and to stay flat – for 50 years. See: No More warped Doors.

Sing Core solves the issues with warping and eliminates the mystery of the warping door. By integrating Sing Core into your door’s composition you can have an elegant, maintenance-free long-lasting door that will not warp, bend, twist or fail regardless of size or application.

Free Door Consultation

The most prestigious clientele around the world seek out expensive door professionals (Certified Door Consultants) to help design doors that meet or exceed the performance standards. We provide free large door consultation to trade professionals to assure that the door that your client receives delivers the high precision performance that they expect.

architectural-door-specs-illustration-torsion-box-coreClick here to see how patented Sing Core door planks/panels/blanks are made providing the only 50 year non-warping guarantee.

Demystifying Door Warping

There is no longer any need to be frightened of doors warping, due to our extensive experience in providing doors (even huge, enormous doors) that are guaranteed not to warp for 50 years to the most proficient building designers, contractors, mill works and high end door manufacturers.

The biggest problem for doors is warping (especially in large doors) used n high-end home building projects and commercial projects when building sliding doors, pivot doors and big interior doors.

Most door manufacturers and millworks avoid building doors over 8 feet tall or offer a very limited one year warranty with many exclusions/restrictions to prevent exposure to damages due to warping. Click here to see

When you buy your door, and even following installation, it may or may not be flat. Most doors begin to shift and move following manufacture. By the time your door arrives at the job site, it may already be warped or beginning to experience separation between the exterior surfaces and the core material.

Certainly after years of regular use (paper core, foam core) will warp and/or delaminate.

lightweight high strength engineered plywood for making large sliding doors aluminumNo matter what kind of standard core a door is made from, whether paper core, foam core, SLC (Stave lumber core), particleboard, SCLS (Structure composite lumber), LVL (Laminated veneer), mineral core, MDF, cardboard, etc… warping is inevitable. Even a solid wood door will warp. A sliding or pivot door will have unbearable warp at only ¼ inch due to the reference next to a straight wall or door jam. This warping is even worse in a door over 8 feet because of the strength of the movement. So far, the best solutions have been to only make 7-foot high doors, or to make excuses (i.e., no or very limited warrantees) for doors over 8 feet, or to use gaskets to hide the minor warping, but these are temporary solutions that require costly maintenance and replacement and tarnish the reputations of the building trade professionals involved in the projects. As such, most doors usually do not have warranty protection against the inevitable warping. Even with SCLC (Structure composite lumber core) and LVL (Laminated veneer), commonly used in high end large door will not remain true flat due to the wood fiber constantly moving.

Finally, Sing Core provides a guaranteed solution to the challenges of warped doors and it is the only affordable lightweight high strength solution that can provide 50 years of high performance, remaining straight and true without fail. Plus, Sing Core offers insulation qualities that cannot be found in other strong (heavy) building materials. Only this unique patented torsion box/rigid foam composite can offer the superior strength – bridging long spans, or towering heights – while insulating and providing sound deadening benefits.

Sing Core helps door manufacturers and mill workers build doors which satisfy even the most challenging high-end door market. (Click here to see our client list.) Doors made with our patented Sing core panels are true flat and may be guaranteed to stay true flat for 50 years. In addition, our patented Sing Panels (door blanks) are:

1. Dimensionally stable with a high precision tolerance of +/- .006 inch. This is laser precision which produces the smoothest and most true-flat panels.
2. Fully insulated for temperature control and sound-deadening qualities and which are 3 to 5 times more insulated than solid wood-based door cores.
3. Lightweight so that even a 4 inch thick door will weigh only 2 to 3 pounds per square foot. An average wood-core weighs 8 to 10 times more than our patented Sing core.
4. High strength which has been verified by the University of Washington at above 660 PSI, making our Sing panels pound-for-pound stronger than steel. (You could drive a 12,000-pound forklift over them without crushing them!)
5. Water-resistance/waterproof doors made of patented Sing core panels can be completely exposed to the weather without warping. (Click here to see our exterior door gallery.)
6. Eco-friendly and non-toxic structure glue for bonding skins and Sing core.

Aluminum skin only for paint grade or wood stave.

Add MDF skin or plywood for paint grade and wood grain.

Click here to see how patented Sing core door planks/door panels/door blanks produce true flat stay flat (non-warping) doors in any size, shape or design with a 50-year guarantee. Call us for a free consultation at (360) 495-3577.