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- Insulated Walnut Door
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- Paint ready with lite cut outs
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- Finish and/or paint doors to specs
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- Honeycomb sandwich unfinished door panel
Pocket Door
Pocket doors have become an integral part of modern architectural design. Despite the many advantages of pocket doors, they do present unique challenges in both the manufacturing and the installation process.
pair of 14 ft. x 3.5 ft. x 2.5 in. warp-free sliding pocket doors
About Pocket Doors
Pocket doors are desirable as they are invisible in the opened position as the pocket sliding doors are hidden away in cavities within the walls in one, or two opposing, wall(s). Pocket doors serve as a retractable room divider, functioning as an elegant and effective method to separate one large space or two adjoining spaces, while the sliding door divider(s) disappear(s) into the wall.
Proceed with caution, as pocket doors can be hugely problematic if they move according to changes in the surrounding environment. A warped pocket door will damage the finish as it rubs against neighboring surfaces and if it bends or cups too much can get lodged inside the wall, and the bigger the pocket door, the greater likelihood of warping.
There are many reasons to have your pocket doors made with Sing Core but the number 1 reason is to stop worrying about warped pocket doors once and for all by specifying
Sing Core Inside Your Pocket Door
Thanks to inventor Peter Sing’s patented and patent-pending large pocket door technologies, you can have an Eco-friendly pocket door that is lightweight, high strength, fully insulated for sound deadening and climate control, covered by Sing’s
50 Year Warp-free and Structure Guarantee
There is no other way to build a high precision (Sing Core tolerance is +/- .006 in.) sustainable pocket door that can remain straight and true, spanning the test of time.
The Best Pocket Doors
Sing Core has become known for making some of the largest, most impressive sliding doors on the market. Pocket doors are sliding doors that slide into a pocket in the wall. Certain customers have come to know Sing Core, not only for our sliding doors, but also for our magnificent pocket doors. Introducing the best pocket doors!
Pocket Door Challenges
The concept of pocket doors seems simple very simple. They are similar to sliding doors in that they slide on tracks and typically use rollers to open and close. The big difference is that they slide into a pocket that has fixed dimensions inside the wall. If the door warps or skews, the door cease to function. You will not be able to open or close the door because warping will change the dimensions of the door.
Warp Free Pocket Door
Over decades, we have developed our patented and patent pending materials that allow for super strong, light weight, warp free door construction. Warping and skewing present significant problems for pocket doors, because pocket doors must slide into a fixed space inside the wall. Any deviation from specifications will prevent the door from fitting into the space. When this happens, your door will cease to function. You will need to buy a new door, change out your hardware that may bend or break as a result of door malfunction. In some cases, you also need to rebuild your door frame or your walls when they are ruined from doors being opened and closed.
But we have solved all of the problems associated with large pocket doors and large sliding doors. When you use Sing Core products, you not only get a door that exceeds AWI standards in terms of warpage, you also get a door that’s guaranteed against warping for 50 years. Because of our special design methods, you will get a door that ensures proper functionality for decades.
Large Pocket Doors
The larger the door the bigger the challenge. Large pocket doors are more susceptible to warping. In order to function properly, they must be specially designed to resist warping. Larger doors must be specially constructed so that they are warp free on installation, as well as, over time.
Ultra High Strength – A large pocket door must be exceptionally strong to stand up to the most rigorous use. At Sing Core, we have revolutionized door strength with Peter Sing’s patented and patent pending technology that allows us to build doors that are very high strength, tested independently at over 660 PSI.
Super Light Weight – Up to 90% lighter than solid wood doors. Sing Core’s specially engineered core uses Peter Sing’s revolutionary design to bring a solid door strength to doors that allows for super light weight performance.
Straight/Warp Free – Specially designed stiffeners built into our doors make sure your doors are warp free over the long haul for better performance and function.
Structurally Stable – With our groundbreaking process, we can make doors that are built exactly to your specifications, and will not skew or shift over time. That way, you have a door that functions worry free for decades.
Eco-friendly – We support sustainability by using renewable, eco-friendly materials, so our products are better on the environment.
Guaranteed – When it comes to guarantees, no company on the market can do better. Our Sing Core Professional Panels are used for doors and other high end applications where stability and precision are of the utmost importance. All of our Sing Core Professional panels come with a whopping 50 Year Guarantee against warping, cracking, breaking, and skewing. Name one other company who can do this. Most companies don’t even offer a one year guarantee, but we can do this because our products have such a strong track record of performance.
No one can make panels as large, yet warp free like we can! You have our guarantee on that.
All of our products are 100% made in the USA. We take pride in supporting our country. That’s why you won’t find any products that aren’t made in America here. We also use high quality inputs that are sourced from local suppliers.
Door Skins
Our door system allows you to specify almost any skin for your doors. We specialize in high quality wood and metal doors. We have several options depending on your budget. Our paint grade ply option is our most economical option. Next is our hardwood veneer option. Mahogany, oak, walnut, and alder are popular. We also use 1/8″ wood stave on our highest end option, which gives you a solid wood appearance, but has our specially engineered core to maintain the light weight feature our doors are famous for. We also make metal doors. In our metal doors category, we specialize in cold rolled steel, but we also have a very popular aluminum option.
The Best Large Doors in the World
Built to last centuries, guaranteed for 50 years
Sing Core helps the best door companies, architects, and millworks build the best doors. Doors with Sing Core inside are built to last centuries, and they are guaranteed for 50 years.
We are proud to provide one of the longest lists of happy customers in the world. All of those customers now possess the most prestigious large size doors, which are guaranteed not to warp, bend, twist, or otherwise fail for 50 years.
Reaching for the stars from the tallest doorway heights of the tallest building in the USA
The most successful, biggest, best, and most well-known door companies and millworks in America rely on Sing Core to provide them with the lightweight warp-free door cores that can support extreme over-sized doors, accommodate added materials (for sound proofing or fire rating), and offer strength ratings which are, pound for pound, stronger than steel.
Sing Core could not make such claims, unless we backed up our words with the highest performance results in the industry.
You can rest assured that your door with Sing Core inside will forever be the best investment you will make, with many years of sustained performance and sustainability.
Eco-friendly Sing Core is fully insulated for sound deadening and climate control.
The best doors in the world have Sing Core inside
When you’re looking at an extravagant large pivot door, sliding door, pocket door, or an elegant French door that towers over your head, remember that we don’t build doors.
We get calls everyday from homeowners wanting to add Sing Doors to their own homes, magnificent over-sized, large doors like the ones they see on our Website or in the most luxurious, over the top, locations all over the world, where Sing Core doors have been finished and installed. We do not do this, because we do not finish or install the doors. Only the best door companies in the world do this. You need to contact your favorite door company.
What we do is to supply the best millworks and door manufacturers, and the most prestigious architects in the United States with our handcrafted warp-free custom door blanks, ready to finish and install. Their expert finishing touches are a major part of why doors with Sing Core Inside look so beautiful. Without their expertise, Sing Core looks just like plain wood panel.
Homeowners who would like Sing Core doors in their own homes can contact an architect or millwork to order, finish, and install the doors for them.
What Makes Sing Core Doors Different?
We have the best patented and patent-pending methods to create the largest, most lightweight, most insulated Eco-friendly most doors that can be guaranteed not to warp, bend, twist, or otherwise fail for 50 years. Sing Core uses the only door manufacturing methods which can deliver these extreme results in the largest, most high precision modern doors featuring any contemporary material, because conventional large wood grain doors are prone to warping and a host of other problems, including excess weight.
How Do You Build a Sing Door?
If you’re a custom door manufacturer, you start with a Sing Core door blank and build your large pivot door, large sliding door, large pocket door, or huge French door just like you would any other door that you build. Having Sing Core warp-free door substrate inside your door makes all the difference in the world.
Our modular door system is by far the best in the world!
Before finishing
We aren’t able to show the final door because of copyright information.
One of a Kind Sing Doors
Keep in mind that no two doors with Sing Core inside are exactly the same (except in the case of large bulk door orders).
Every door with Sing Core inside features a uniquely engineered base door material which is manufactured to exacting standards taking into account all the details of the application associated with each door.
Attention to Detail
Attention to detail is the method of ensuring that each Sing Door can be guaranteed for flawless performance and longevity by taking into account where the door will reside when it is installed. What will the climate conditions be? Will it be installed inside, outdoors, or will it be a front door with one side exposed to the elements and the other to the structure’s interior?
Will your large exterior door be facing North, South, East, or West? What materials will be used on the exterior of the door? Will the surface material need to match other doors featured in the project?
Large over-sized wooden doors present their own set of challenges because every different species of wood grain has its own propensity to shift with changes environmental changes, like temperature and humidity. Sing Core inside as well as the stiffening and anti-warp configuration in the door substrate will have to be uniquely matched to any difference in door size.
Sing Core is not a one size fits all solution
That’s why you find Sing Doors featured inside the most expensive homes, commercial, and industrial locations in the United States and around the world.
It’s no easy job to make a warp-free large door, especially if it is door of enormous proportion which needs to remain dimensionally stable and warp-free over time, but as the most prestigious millworks and custom door manufacturers already know, Sing Core is the only way these results can be achieved.
Sing Core Solved the Problem
Sing Core has solved all of the problems associated with manufacturing large over-sized doors of all kinds. Door designers and engineers no longer have to deal with the problems of weight to strength ratios, or having to worry about how to transport, handle, or install large heavy doors.
Doors with Sing Core inside are not only lighter in weight than other solid core doors but they are high precision (hosting .006 inch tolerances) and stronger than steel (660 PSI or more) pound for pound.
How Can You Get a Sing Door?
All you have to do is to go to your favorite custom door manufacturer or local millwork and tell them what kind of door you want being sure to tell them you want,
“Sing Core inside your door.”
We will work with them hand-in-hand to design the perfect door to your specifications.
With Sing Core
You Can Have Your
Dream Door
Make your door dreams come true with Sing Core inside your door.
Skin Types Plywood Paintgrade And Other
Plywood door skin is one of our main specialties.
Aside from our higher end soft or hard wood veneer and 1/8″ inch solid wood stave doors, we also offer a full range of soft wood and hard wood ply wood skins for stain or paint. In our most economical range of products, we offer our paint grade, MDF, MDO, Masonite, and Formica alternatives for more restrictive projects.
Soft Wood Plywood – Paint Grade Option
Ply wood is at the core of your most economical, yet stable substrates. Ply offers you the strength and stability you need to achieve the style and function you need from the most rigorously used doors you can imagine.
Standard Plywood Skin
AB Plywood Skin
Beautiful Marine Plywood Skin
Hard Wood Plywood
Enjoy real hardwood grain when you’re on a tight budget.
Hard Wood skins create a pleasant environment that never goes out of fashion and offers so many style choices, so you can achieve the precise look to convey your brand and image. Whether it’s the upper echelon of the high end residential market or the most reputable segment of the commercial industry, the hard wood look might be your absolute best choice for your current applications.
Walnut Plywood Skin
Stunning White Oak Skin
Beautiful Mahogany Hard Wood Skin
Incredible Maple Hard Wood Skin
Hemlock Wood Skin
Alder Wood Skin
Magnificent Mahogany Hard Wood Skin
MDO and MDF
Many customers choose MDO or MDF because it has good warp-free capability and good resistance to water. MDF is popular for indoor use, because it is very smooth for priming and painting applying your own veneers.
Medium Density Overlay (MDO)
Medium Density Fiberboard (MDF)
HPL, Formica, Masonite Option
We offer a wide variety of Formica, Masonite, or other types of HPL (High Pressure Laminate) textures and finishes. We can apply any kind of HPL skin, and many come in natural wood grain designs which are indistinguishable from the real thing but almost indestructible. This is why you find HPL is high traffic industrial and medical environments, resistant to damage and easy to clean. Just give us the product number and manufacturer. We can apply it!
Dark Stone Finish Formica
Rich Red Wood Finish Formica
Blond Wood Finish Formica
Beautiful Dark Granite Formica Finish
FRP Fiberglass
FRP Fiberglass is another very popular option. This beautiful, durable skin option is found in some of the highest end applications, because it exudes quality and wealth.
Other Skin Options:
We can apply any skin. If there is a skin you need that you don’t see on our website, please ask. We can apply any skin. Your panels are only limited by your imagination.
In our mid level category, we offer beautiful, real hardwood veneer with solid hardwood edges. Solid hard wood edges are an additional option.
In our highest end price point, we offer full on wood stave skin doors, made with the highest quality hard and soft wood 1/8″ real hardwood stave skin. Click here to see some of the most beautiful doors in the world.
WOOD VENEER DOORS
Premium Veneer Doors with a 50-Year Warp-Free Guarantee
Sing Core veneer doors give you the authentic beauty of real hot press wood veneer doors with unmatched performance. Whether you need a grand entry door, pivot door, or architectural interior feature, our lightweight, high-strength panels deliver stability that ordinary veneer doors can’t match. Every Sing Core veneer door is backed by our 50-year structural and warp-free guarantee.
Why Choose Sing Core Veneer Doors?
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Warp-Free for Life – Our patented core prevents twisting, bowing, or cupping, even in oversized formats.
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Lightweight Strength – Stronger than steel pound for pound, but a fraction of the weight of solid wood.
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Authentic Beauty – Compatible with nearly any veneer species, including walnut, oak, mahogany, maple, cherry, and exotic woods.
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Flexible Options – Order ready-to-veneer substrates or finished veneer panels through our hot-press partners.
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Trusted Nationwide – Specified for major architectural projects, including One World Trade Center.
Tallest 16 ft. doors at the top of the tallest building in the USA
How Sing Core Veneer Doors Are Built
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Engineered Core
Our torsion-box honeycomb structure creates a perfectly flat, dimensionally stable foundation. -
Solid Wood Edges
Doors can be finished with matching edges, rails, or stiles for seamless joinery. -
Veneer Application
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Local Veneering (recommended): We ship substrates; your local hot-press professional applies veneer.
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Factory Veneering: We can arrange hot-press veneer application through trusted partners.
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Finishing
Panels can be sanded, stained, painted, or clear-coated. Proper finishing ensures lasting beauty and stability.
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- Perfect Sides
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- Perfect Oak Edges
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- Exotic Teak Veneer Skin
WOOD VENEER DOORS by SING CORE
Frequently Asked Questions
What is a veneer door?
A veneer door uses thin slices of real wood bonded to a stable core, creating the look of solid wood with reduced cost and weight.
Why use Sing Core inside veneer doors?
Traditional veneer doors are prone to warping. Our patented substrate ensures long-term flatness and stability, even at extreme sizes.
Do you apply the veneer?
In most cases, we supply warp-free door blanks, and veneer is applied by local hot-press professionals. We can also arrange veneering on request.
Which veneer species are available?
Nearly any — from domestic options like oak, walnut, maple, and cherry, to exotic imports.
Are Sing Core veneer doors guaranteed?
Yes. All professional veneer doors made with Sing Core include a 50-year warp-free guarantee.
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- Amazing Sapele and Oak Stave Combo
Other Skin Options:
Finally, we offer soft wood and hard wood plywood skins. We also offer MDO, MDF, Formica, Masonite, and many other skins. Click here for more information.
In conclusion, we offer full on wood stave skin doors, made with the highest quality hard and soft wood 1/8″ real hardwood stave skin.
See more of Sing Core’s Custom Oversized Doors HERE
One World Trade Center Doors
The top doors in America are installed in the top floor of the tallest building in the United States, located at One World Trade Center, New York. These 16 ft tall 3 ft wide 2.25-inch thick warp-free door panels are among the only Eco-friendly lightweight, high strength, insulated doors made in the USA that can be guaranteed not to warp, bend, twist, cup or otherwise fail for 50 years.
If you’re one of the top contractors in America, when you’re called on to deliver the best tall doors to the top of the World Trade Center, you want to make sure you’re not embarrassed when your sleek white oak doors fail due to warping.
When your reputation depends on it, you need the backing of a professional company that can deliver the goods and have your back, and there’s only one company in the United States that builds large doors which can be guaranteed for 50 years.
The most exclusive architects in the world specify, “Sing Core inside,” their doors when nothing less than the very best will do, and you want your customer to be on the top of the world.
Let’s take a tour of these revolutionary doors from the factory to the top floor of World Trade Center One…
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- Shop Drawing
Photos taken from the edge of the panel show the perfectly straight quality. The panel shows glue on the edge, because the customer requested untrimmed ends.
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- Perfect Sides
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- Perfect Oak Edges
2.25” thickness. Due to the patented and patent pending SingCore technology, this 15.5 foot long, 3 foot wide, 2.25 inch thick pivot door is straight as an arrow, better than AWI standards.
How to Build the Perfect 16 ft. x 3 ft. High Precision Warp-free White Oak Door
You start with patented and patent-pending Sing Core inside sandwiched between American-made A/B plywood with solid oak around all four edges.
After pressing, trim the edges, then add another 1” x 2.25” solid oak to the edges. Sand it to perfection then hot-press 16th-inch white oak veneer, then all you can see is solid white oak. Beautiful.
The result is a perfectly flat lightweight white oak door that is stronger than steel pound-for-pound, weighing in at a mere 220 lbs.
Ask us if you have any questions.
Sing Stile and Rail Doors
The Sing-style approach to stile and rail doors is a horse of a different color amidst the age-old door industry. Sing stile and rail doors are lighter in weight and stronger than steel yet made of nearly any flat building material available, not matter how they’re built.
Sing Stile and Rail Look
Our most sought-after stile and rail manufacturing method produces a stile-and-rail-looking door from a solid composite Sing door slab which feature alternating wood grain orientations on the door surface to emulate the look and feel of a stile and rail door without any weak spots.
The resulting Sing Stile and rail door made of a solid door panel is the strongest, lightweight, most insulated, Eco-friendly door proudly made in the USA.
Sing Stile and Rail Construction
Even among the most tried and true stile and rail door manufacturers, they know that the only way to build a large stile and rail door which can be guaranteed not to warp for 50 years, is with Sing Core inside.
Rather than build a stile and rail looking surface and applying it to a solid slab of Sing Core, traditional stile and rail manufacturers prefer to use stile and rail components with Sing Core inside.
Basically, this means that all the stile and rail components are manufactured by Sing Core in building material formats which are very similar to our post and beam configurations, and/or furniture panels. These are assembled by your favorite stile and rail door builder just as they would any traditional wood stile and rail door components.
Sing Stile and Rail Advancements
You might be surprised what benefits can be enjoyed by custom door makers who construct their doors using patented Sing products. This new, revolutionary door building material is
Lightweight Stile and Rail Doors
Weighing in at a fraction of other solid core doors, Sing stile and rail doors can be very lightweight, even if they are very big doors, without threatening the longevity of the door’s performance over time.
High Strength Stile and Rail Doors
Stile and rail doors made of Sing Core are incredibly strong. Rated at 660 PSI, Sing Core is stronger than steel pound for pound, thanks to Peter Sing’s patented solid composite torsion box core substrate, incredible unsupported spans are possible, enabling doors with Sing Core inside to outperform any other lightweight door.
50 Year Stile and Rail Guarantee
Professional grade Sing Core has such a high precision tolerance (+/- .006 in.) and withstands just about any variance in conditions across the board, that these are the only door which can be guaranteed not to warp, bend, twist, or otherwise fail for 50 years, including full structure warranty.
Eco-friendly Sing Core
Using Sing Core is the Eco-friendliest way to build a sustainable door, which is made with a smart combination of minimal natural and recycled material combined to create this revolutionary door core material which is the lightest weight and highest strength way to build doors of any kind.
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- Bi-directional Walnut
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- Bi-directional Walnut
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- Lightweight French Door
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- insulated, high strength, lightweight Sing honeycomb door
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- Walnut
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- Honeycomb sandwich french door with windows
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- Sing honeycomb french door panel
New Revolutionary Door Technology by Sing Core
We offer our services to support door manufacturers in building stronger, lightweight, high precision and warp-free (AWI warp standard) insulated doors using our patented and patent pending Sing Door Blanks and Sing Stile and Rail frames.
Sing Core’s specialty is assisting to create incredibly large and extremely wide door panels which door manufacturers can utilize to build the most challenging high-end doors.
Large Quantity Production Runs
We can also assist in the high-quantity production runs for doors using our facility to pre-build base doors which might otherwise create a bottleneck for common door manufacturers. We love taking over the assembly line bulk of your large door orders with rapid turnaround times.
You choose your method of building your Sing Core door blanks:
1. Sing Door Core Panel
You specify the length, the width, and thickness of your Sing door blank, built to your specifications. You determine the insulation value and skin material, and we do the rest. The Sing door core panel method is the strongest and best Eco-friendly insulated door solution for any sized door, even large oversized wooden doors, available in almost any style.
Click Thumbnail to View Photos
2. Stile and Rail Door Frame
For our customers and their clients who prefer the standard design of stile and rail doors, we provide the manufacture of a stile and rail formatted frame made of any combination of Sing panel, post and beam configurations to create the most sustainable stile and rail doors, which are finished by only the best millworks and custom door manufacturers. Sing Core provides the most significant improvement to stile and rail technology (besides automation) in the last 100 years to create the strongest, lightweight, most high-precision, and warp-free performance in the history of the door industry.
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- Insulated Walnut Door
Doors of Almost Any Style Could be Made with Sing Core Inside
1. Pivot Doors
Pivot doors are the highest and best use of Sing Core because for the most part, pivot doors are quite large in size and are often much thicker than a standard door. If your intention is to feature a real wood finish, you know you’re going to be in trouble, that’s when the warp-free attributes of patented Sing Core shines through as the only way to build a large wood door which can be guaranteed to offer warp-free performance over time: 50 years, guaranteed, on professional grade doors.
2. Sliding Doors / Pocket Doors
Sliding Doors often present problems when they are very large due to their sensitivity and tendency to move, bend, or cup in response to changes in the environment, for which Sing Core is the perfect solution.
Large bypass sliding doors are likely to deface, scar, or otherwise damage themselves if they are not kept straight and true by being built with Sing Core inside in advance of bypass door failure.
Pocket doors, which are the most problematic of all sliding doors, because they hide within a cavity are highly benefited from being built with Sing Core inside. If warped, the finish of the door may be compromised as it brushes against the frame or cavity’s interior, and if it cups or bends too far, may become lodged either inside or outside of the pocket unable to open and close as a door. Sing Core keeps them straight and true.
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- Black walnut sliding door
3. Hinged Doors
Hinged doors are for the most part manageable even when facing a certain degree of warp, which is normal in normal sized doors. Problems arise when doors are very large, especially if over 7 ft. tall or 3.5 ft. wide. Any movement or change in the door’s being compromised is increased exponentially in relation to the dimensions of the door. Not a problem with Sing Core’s professional door blanks.
Diverse types of hinged doors, such as French doors, sliding folding doors, front entry doors, and carriage doors (among other types of hinged doors), all present varying challenges when migrating from the drawing board to the real world, and Sing Core makes the difference.
Door Sizes
While Eco-friendly insulated Sing door blanks could be used in doors of any size, the efficacy is maximized in door performance in any door over 7 ft. tall and 3.5 ft. wide. This is why you find Sing Core inside the largest doors in high-end homes, businesses, and industrial sites, because it’s the only way to build a large door which can remain straight and true, regardless of the size of the door, while still remaining lightweight.
Door Shapes
Since every door slab manufactured by Sing Core is likened unto a one-of-a-kind piece of art, architects and designers are free to create a door of any size and shape using any available flat building material.
Sing door slabs can be created to accommodate any shaped design in any thickness, and so it goes for any shaped light cutout for glass openings.
Skin Options
Sing door slabs are available in almost any skin you want, limited only by flatness (surface material must be flat), ability to be laminated, and availability.
Some examples include, paint grade plywood, aluminum, brass, cement board, cold rolled steel, concrete, diamond plate steel, fiberglass, FRP, galvanized steel, glass, hot rolled steel, LVL, Masonite, stainless steel, any wood species including exotic species, and many more.
Our most common specialty includes the cold pressing of solid wood stave to our patented and patent pending core material, resulting in natural wood doors that can be guaranteed to remain warp-free for 50 years. Unheard of in the wood working industries. We also supply high end millworks with hot-press-ready warp-free substrates to apply their skins to.
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- Black walnut sliding door
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- Accurate Panel Insure Tight Fit Bi Fold Doors
Light Openings
Available in any size and any shape, based on your drawing(s).
STC-rated Sound Doors
We assist in the creation of sound reducing or sound proof doors which can be STC-rated at our local world-renowned pro sound testing lab. Some typical composite configurations include combinations of steel, sheetrock, MDF, and other materials to achieve the sound proof results to meet your specifications.
Fire Proof Doors
We build fire proof doors to your specs and can have them rated at the fire-rating facilities selected by our fire proof door clients.
And that’s just scratching the surface…
Imagine all the possibilities… Click Here for More
Don’t Get Stuck with a Fake Sing Door
Does Your Door Have Sing Core Inside?
If your door has Sing Core inside it can come with a full 50-year warp-free guarantee. No other door can be guaranteed like that, unless it has Sing Core inside.
It is rare, but there have been occasions when a door has warped, when someone thought it had Sing Core inside, but it did not.
For instance, last year, an architect in Florida specified a large wooden door with Sing Core inside. The contractor contacted Sing Core and received an initial price quote.
Nine months later, we received a call from the architect who had been contacted by the building department that reported that a large wooden door with Sing Core inside had warped.
We searched our records and could not find any record of the job. We did discover the initial price quote request from the contractor who must have found a different way to make the large door.
Your large door with Sing Core inside comes with a certificate of authenticity and guarantee.
Be forewarned, if your large wooden door doesn’t have Sing Core inside, you can expect it to warp.
Make sure your large doors have Sing Core inside.