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Impossible Doors Our Specialty

If you would like to know more about how to design a door with Sing Core inside, click here.

When it comes to building the most unique doors, especially large, oversized doors of any size (up to 20 x 60 ft. or more), type, or style of door, Sing Core’s True Flat Team knows how to bridge the gap between impossible and possible, by applying many variations of their patented and patent-pending technologies to make it happen. Some of our most recent projects include curved doors, Sing stile and rail doors, new patent pending Sing Core stile and rails, long-span wood stave planks, CNC door carving blanks, large sliders with man doors, billionaire home doors, and hot rolled steel doors.

When an architect’s visionary project is coming to life, it is common for the project to come to a halt when the main door (this inspired visual centerpiece of the project) presents problems for the millwork or door company in charge of the rest of the door schedule.

Oftentimes, the most common response is, “We will build it, or have it built, to your specifications, but this door will be placed on a separate rider, excluding it from any other warranty that may be covering the remainder of the door schedule.”

The door company will probably not even bother with the manufacturing of this piece, as it is too costly to re-tool to build it and it is likely to fail not long after installation. So, they will sub it out, and have an artisan millwork build it, freeing them from any responsibility for follow up maintenance calls regarding this piece of the job.

That is, unless they are working directly with Sing Core.

Many of the biggest door companies and high-end millworks are back into the specialty door business because they have partnered with Sing Core.

Why Sing Core?

Sing Core offers solutions that make impossible doors possible, and not only possible, but these magnificent works of art can be guaranteed not to fail, as they are covered by Sing’s

50-Year No Fail Guarantee

These enormous or one-of-a-kind unique doors are nothing short of amazing, with unparalleled service records and longevity, and they are guaranteed not to warp, bend, twist, cup or otherwise fail (including full structure and lamination warranty) for 50-years. No other door in the world comes with such an impressive guarantee unless it has Sing Core inside.

The Most Unique and Challenging Doors

Large doors are not the only unique and challenging doors to come to the attention of the True Flat Team. Many other types of architectural doors will present a huge list of problems that will send door engineers, designers, and custom door makers running for cover, yet they are no problem for the Sing Core factory teaming up with the sophisticated door manufacturer or millwork to accomplish. Like these:

Curved Doors

Curved doors are unique specialty doors, that require precise curvatures, especially if they are being newly installed in a pre-existing wall or structure that is curved. Matching the curvature of the door to the existing wall can be extremely difficult, but the True Flat Team at Sing Core make the perfect curved door to match any curved wall or structure, while still guaranteeing the door for 50 years to perform without warp.

Sing Stile and Rail Doors

The Sing-style of stile and rail door is a departure from traditional stile and rail door technology. The clients who prefer the Sing-style stile and rail door are looking for characteristics that are unavailable via traditional door building methods but still retain the look and feel of a traditional stile and rail door. Specifically, they are looking for a stile and rail door that is impact resistant, insulated for both sound deadening and climate control, and of course guaranteed for 50 years. Sing Core accomplishes this by building the stile and rail face on top of a patented warp-free core.

 

Large Thin Stile and Rail Framed Doors

Sometimes the architectural door specifications are unusual, like this wood-framed traditional stile and rail door with a large glass lite opening. This is a 14 foot tall door that calls for only a three-inch wood stile and rail surround to hold the glass. This is unusual and would be hard to accomplish with standard door building methods, and it was even a challenge for the True Flat Team, which led to their creating a new type of stiffener, which is now patent-pending technology. Now, standard stile and rail doors made with Sing Core stiles and rails can be guaranteed to remain warp-free for 50 years using new patent pending Sing Core stile and rails.

20-ft Span Wood Stave Garage Door

This is just one example to the many kinds of garage doors that Sing Core has helped to make possible. In this case, the architect insisted on 20-ft spanning warp-free wood stave planks, that any other way would have been impossible. 50 years from now, will be just as straight and true as freshly installed thanks to Sing Core and their long-span wood stave planks.

CNC Carved Doors

These beautifully CNC carved doors would be impossible to keep straight as they are accentuating the wood’s natural grain which is already trouble brewing, if not for the warp-free Sing Core working hard behind the scenes, deep inside to keep these doors perfectly and truly flat even though they are 107-inches tall using Sing CNC door carving blanks.

 

Large Sliding Doors with Man Doors

When it comes to large sliding doors with man doors, there is really only one way to do it with a high degree of precision. The large sliders with man doors must remain decidedly straight and true in order for the man door to operate seamlessly, plus, because there is Sing Core inside, you get the added benefit(s) of getting lightweight, high strength, fully insulated for sound and climate control, and our 50-year warp-free guarantee.

 

Billionaire’s Exotic Home Doors

These massive natural teak doors have Sing Core inside to keep them from warping and also to provide added protection from outside interferences to privacy and the elements. Not everyone can have their whole homes fitted with Sing’s doors, but what a great feeling it is having done so with Sing’s billionaire home doors.

 

Hot Rolled Steel Doors

Hot rolled steel doors can be a challenge, especially if they are very large. Normally, large hot rolled steel means a lot of weight needs to be articulated adding stress and strain to the frame, hardware, and structure if used very often. Patented and patent-pending Sing Core reduces the weight greatly while enhancing the door’s characteristics enabling one to install a man door or open and close a mammoth-sized hot rolled steel door easily.

 

When Bigger is Better

Thanks to the patented and patent-pending technologies in the hands of the True Flat Team at Sing Core bigger does not necessarily have to mean heavier or big troubles are ahead. With Sing Core inside your big doors can be lightweight, high strength, fully insulated, and guaranteed warp-free for 50 years.

If you would like to know more about how to design a door with Sing Core inside, click here.

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How to Build a High-End Stile and Rail Impact Door

Being in the business of helping the biggest door manufacturers and high-end millworks building the best doors in the world, we thought we might let you in on a little secret. Sing Core is world renowned for building the best enormous doors that are lightweight, high strength, fully insulated, and guaranteed to perform warp-free for 50 years. But did you know that we also make the world’s strongest lightweight and insulated stile and rail doors?

The popularity of stile and rail doors has been around for years because, number one, they look amazing. They have a unique appearance as they are manufactured of panels of various sizes. The most popular, and it is the one you are most likely to think of when you think of a stile and rail door, is the six-panel door.

Hands down, this is by far the most popular design. The traditional six panel door is made up of 15 individual wood pieces with alternating grain orientation and all the components are assembled by varying means depending on the application of the door.

If the best feature of the stile and rail door is the undeniable appearance of the door, the second-best feature of the stile and rail door is it’s ability to stay relatively straight over the life of the door. This is accomplished by varying the grain orientation of all the individual panel pieces, which push and pull against each other, unlike a traditional solid slab door which can move wildly at any time or according to any change in the environment.

But the biggest disadvantages include very low insulation value. This means they are not well suited for climate control or sound reduction, and for high-end clients, though they love the appearance of the panel doors, they are not very strong.

If you build stile and rail doors, you may need to know how new technology can lower your labor costs and increase your productivity when building all types, styles, and designs of doors. Sing Core has done it and proven it backed by the best guarantee in the industry.
We can help you:

  • Meet your production needs – Fast Delivery
  • Exceed your quality expectations – High Precision
  • Reduce your labor cost – Money Saving
  • Structural guarantee – 50 Years!
  • Custom sizes – Any Size or Weight
  • Fully insulated and sound deadening door panels

The Sing solution is to build your stile and rail door on top of the patented Sing Panel Door Substrate invented by Peter Sing. Sing’s substrate is lightweight, high strength, fully insulated and comes back by the only

50-year Warp-free Guarantee

in the door industry.

Now, you do not have to settle for a weak stile and rail door because your stile and rail door can have Sing Core inside.

How to Build a Stile and Rail Impact Door

The first step is to start with Sing’s patented core which is built of small metric vertical grain torsion box where the voids are filled with foam for insulation, and this is sandwiched between two stress skins.

The next stage is where the expertise of the millworks and door manufacturers come in. Instead of manufacturing the door out of individual pieces of wood stuck together, the panel design elements, as in our six-panel door option shown here, are added to the surface of the door.

This gives you the appearance of the traditional six panel that we all have come to love, but if your six-panel door has Sing Core inside, you have the lightweight for panel doors of enormous size, or adjustable weight for smaller doors, with all the insulation and incredible unbreakable strength.

Sing says, “If you kick a traditional stile and rail door you will break the door, but

“If you kick my door, you will break your leg.”

(Don’t try this at home.)

This is just the beginning. Sing can help you make any kind of door. Sing Core is featured in all kinds of doors and is highly sought after when creating replacement doors is historical restorations, especially if they are large doors which are problematic for maintenance because they do not have Sing Core inside. We do not sell our products to homeowners, door stores, or door shops. We do not sell our products to general contractors without door finishing facilities or capabilities. We mainly deal with door manufacturers and millworks which have experience to build high-end doors.

Problem Solved.

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Hot Press Veneer Professionals

Hot Press Veneer Professionals are More Successful and Profitable with Sing Core

For years, Sing Core has been providing high-end local and nationwide hot press veneer professionals with premium core material that eliminates the need for crossbanding.

Let’s face it, nothing can compete with the beauty and elegance of a perfectly hot-pressed panel, and for that sweet-spot in the marketplace, those clients that demand the best and are willing to pay for it. The manufacturers and millworks that have Sing Core inside their hot-pressed products are making bank by specializing in these ultra-high-end projects.

For general contractors, we recommend using your local millwork to lay veneer, as it requires a skilled professional.

From the Inventor of Sing Core

Sing Core Inventor Peter Sing

Sing Core Inventor Peter Sing

I get asked by hot press veneer shops, if we are in competition with them? And the answer is, “No.” Even though we are specified by architects all over the country in large veneer projects, and mostly in huge veneer doors, we do not do the veneer. What we do is to provide our substrate to the best hot press veneer professionals we know. If a contractor contacts us first because we were spec’d on the job, we have him tell us which veneer company he wants us to work with, and my team is willing to help match up the best material and veneer services if they ask us for their advice, and that’s what we do.

I have invented patented and patent-pending solutions for high precision veneer projects that take the pain out of the challenges normally associated with big, long-spanning high-end jobs, anywhere from the San Francisco MOMA to the top of the World Trade Center’s Freedom Tower.

The top reasons the architects specify Sing Core is because

  1. We use only the best hot-press veneer companies to apply the best veneers, because I understand that doing veneering really great is an art, and we suggest only using the best artist, as you would on any important project.
  2. My company does what we do best, that is to provide the best substrate for veneer specialists to lay high quality veneer with the best guarantees in the woodworking industry.
  3. The people and companies that I work with are the best in their field and they don’t have to worry anymore about if this will work or how to solve problems associated with weight, dimensional stability, warping, or long lifespan. We’ve spent years in R&D to make sure that the biggest doors in the world do not have to warp anymore, and the biggest door companies trust me to make it so. In the last 10 years, they have not reported a single failed door, even including doors of immense size. Not one.
  4. My core is stronger than steel pound for pound and less than 1/3 the weight of doors made of solid wood core. Sing Core provides a high precision strong full bonding surface for veneering to that is so smooth crossbanding is not required. How high precision? Try +/- .oo6 inch, compare that to any other core material.
  5. Sing Core has insulation for enjoying warmth in Winter and cool Summers, is sound deadening for peace and quiet, and more dimensionally stable than other type of core such as foam core, honeycomb core, wood-based core.

You may not see everything we do because it is hidden deep inside the door or panel, but it’s there and many people can sleep soundly at night knowing that we have done all the hard work in advance, so that you don’t have to worry about endless maintenance calls.

I am so proud of my invention, that I put my name on it: Sing Core

~ Peter Sing

What makes a hot-pressed panel worth so much more with Sing Core inside?

Architects are increasingly specifying their large high-end hot pressed veneer panelized walls, features, and doors have Sing Core inside (accounting for about one-third of all our products which are sent to the greater New York-area). The contractors generally contact Sing Core directly first, due to being specified. Though Sing Core does not actually do the veneering. Sing Core provides the high precision substrate that is shipped 3,000 miles from the manufacturing location in Washington State, to the high end millwork in New York (or wherever the nearest hot press specialist is near the construction site) to do the veneering there.

You will find Sing Core inside high-end hot pressed veneered ceilings, walls, floor, and doors in the most demanding architectural designs and projects.

Why?

Why must architects and designers go through such an unusual process to meet the needs of these high production and precision projects? According to those who are specifying and using Sing Core in their projects,

“There’s just no other way to do it.”

Large Size Concept Consideration

In an age when the biggest projects often include large spanning surface areas wrapped in beautiful wood veneer, the large scope of such a project is problematic. You are dealing with immense spans of material which is difficult to maintain straight and true, because at that size, most material will begin to move with changes in temperature, humidity, or other environmental variations. Sing Core is the only known method of keeping these spans straight and true. That is why the biggest door companies use Sing Core inside their doors that are over 9 ft. tall, because it doesn’t take much movement in a large door to render it inoperable. Then you do not have a door, you have an obstacle, or a bowed wall that needs to be dealt with. This leads to Sing Core’s primary function in these huge projects,

Warp-Free Hot Pressed Veneer

Particularly in high-end designs featuring the beauty of hot pressed veneer, the last thing you want is your project to express variances or changes. The desire is to have a completely flat surface that can span great length without warping. This is what Sing Core provides. It is the reason large doors (even extremely large doors) are guaranteed not to warp, bend, twist, or otherwise fail for 50 years, because they have Sing Core inside.

Highest Precision

High precision is a sought-after attribute of some of the most demanding clients, and Sing Core’s high precision (+/- .006 tolerance) gives them the high end performance that your clients are willing to pay extra for.

Lightweight Veneer Panels

Hot pressed veneer panels with Sing Core inside weigh less, not much more than a hollow core panel, but feature a fully insulated warp-free solid hybrid core that is 100% surface-area bondable.  We do not provide hardware or veneering.  If asked to lay veneer, we subcontract out to the best veneering professionals.

100% Surface Bondable

That means, no weak spots like you might see in honeycomb-type cores, which offer only 10% or less surface bonding area. This full-bonded surface area inside the panel eliminates delamination over time.

Fully Insulated Veneer Panels

The insulation value is important in high-end hot pressed veneer applications for both climate control and sound deadening capabilities within expansive structure designs.

Less Expensive to Deploy and Install

Keeping these hot pressed veneer panels lightweight translates to less expensive shipping, handling, and hardware. They are easier to and less expensive to transport, manage and install on site with fewer risk of injuries, even if the panel is exceptionally large.

 

 

50-Year Guarantee

The non-warping hybrid core allows large door companies to build large doors that can be guaranteed not to warp, bend, twist, or otherwise fail, including delamination.

We Do Not Veneer

We always recommend using your local veneering professionals for custom veneer doors. We do not provide veneer or install it.  It is our policy to subcontract veneering jobs to the best veneering professionals in the USA.

If you offer hot-pressed veneer services or cold-press veneering to your clientele, your highest paying customers will gladly pay you more if your panels have Sing Core inside.

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Extra Wide Front Door

The inventor of patented Sing Core invites anyone to challenge his claim to fame being,

“The only way to build an extra wide front door that does not warp.”

Peter Sing’s revolutionary lightweight high strength extra wide front door core is what makes it possible for all the biggest and best door companies in the world, millworks, and specialty custom architectural door builders to build extra wide front doors that can be guaranteed not to warp for 50 years.

What?

Peter Sing, the inventor of patented Sing Core and many patent pending anti-warp and composite technologies associated with the creation of extremely large door blanks (up to 50 ft. or more) which are high tolerance (within +/- .006 in.) and dead flat.

Sing’s True Flat Team reviews every extra wide front door spec and assists in the engineering of a door blank that can stay straight and true for 50 years.

Finally, thanks to Sing’s door building technologies, the biggest and best door companies, millworks, and custom door manufacturers are able to build enormous extra wide doors of nearly any material, which would otherwise be highly problematic to use, like solid wood for example, that are Eco-friendly and will not warp.

Plus, there’s more…

If your wide front door has Sing’s core inside the result will be a door which possesses these exciting characteristics:

  1. Eco-friendly
    1. Responsible use of natural materials
    2. Includes recycled materials
    3. Long lifespan
    4. High sustainability
    5. Reusable/easy to repurpose
  2. Lightweight
    1. Weighing in at a fraction of other solid core doors
    2. Less expensive hardware (based on door weight)
    3. Easy and less expensive to ship, handle, and install
    4. Less wear and tear on hardware and structure
    5. Fewer door-related injuries
  3. High strength
    1. Stronger than steel pound for pound
    2. More dimensionally stable
    3. Impact resistant
    4. Will not cup, bend, or twist
    5. Can span unsupported distances without fail
  4. Fully insulated
    1. Built-in insulation provides sound deadening
    2. Excellent separation between adjoining spaces
    3. Increased climate control
    4. Provides safety and security from the elements
  5. Warp-free
    1. Perfectly flat
    2. Meets or exceeds AWI standards
    3. Patented and patent pending warp prevention technologies
    4. Sing Core is the only way to do it, guaranteed
  6. Any Material
    1. Natural wood grain, including exotic woods subject to availability
    2. Aluminum
    3. Cement/concrete
    4. Fiberglass/FRP
    5. HPL (high pressure laminate)
    6. Laminates (including Formica, Masonite, etc.)
    7. Other Metals
    8. Steel (cold rolled steel, hot rolled steel, galvanized, stainless)
    9. Any other flat building material to specs
  7. 50-year Guarantee
    1. Warp-free guarantee
    2. Full structure guarantee
    3. Includes lamination guarantee
    4. Only doors with Sing Core inside can be guaranteed 50 years

So, if you’re looking for a wide entry door (“How wide?” you might ask? Up to 50 ft. wide or more), then you will be miles ahead with a low maintenance long life extra wide front door with Sing Core inside.

For some people, a door that is 42 inches wide or 60 x 80 front doors are considered as extra wide front doors, but here at Sing Core, our wide entry doors start at 48-inches and go up to 600-inches or more, so handling your wide front door is not going to be a problem for Sing Core.

How to Build an Extra Wide Front Door

You start with Sing’s patented hybrid torsion box composite wide door core, which is made of natural vertical grain wood fiber metric structure grids filled wall to wall with rigid foam sandwiched between two structure skins to complete the torsion box.

This creates an impervious warp-free surface to which you may apply nearly any flat building material to your specs to create any result you care to achieve.

All the biggest and best door companies, millworks, and large custom door manufacturers know this is the,

“Only way to build a large door that will not fail.”

Only the best extra wide contemporary front doors are made with Sing Core, and yours should be too, especially if it is an extra wide contemporary front door, to make sure you don’t get stuck having to repeatedly fix your door over time, saving you the headaches and costly maintenance costs.

Sing Core is the only way.

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Sacred Horizontal Grain Wooden Doors

Designate Sacred Space

12 ft tall horizontal grain walnut door

A wooden door can be used to designate sacred space. By orienting the wood grain horizontally instead of vertically, a clear separation between two differing domains is indicated. For instance, the “world” may exist on the outside of the door, while the inside space on the other side of the door is deemed as separate, protected, or sacred.

Feng Shui enthusiasts are attracted to wooden doors with Sing Core inside as entry doors, for the strongest doors are those which also separate two domains, that of the world from the structure’s interior, in a sense, keeping unwanted energies from intruding upon inhabitants.

This idea of preserving or honoring personal or sacred space is a concept which is fully embraced by inventor Peter Sing and his patented Sing Core technologies. This combination of horizontal oriented wood grain, superior strength, and sound deadening capabilities in a front door adds to the creation of a respectful barrier.

This method of creating separation is powerful and one can find clues to support the preferential dictates of such a door. Buddhist and Japanese barriers known as “kekkai” are low profile horizontal markers which indicate a barrier which should not be trespassed upon, and to do so dishonors those who have set aside the space on the other side of the maker as consecrated.

You might see these honorable markers on the ground, so as not to obstruct the view, such as a horizontally placed length of bamboo, rope, chain, or other material placed in this manner. In Japan, these barriers are more effective than fencing-off an area, without disturbing the symbiotic resonance of the surrounding environment.

The onus is on you to respect such a discreet boundary and to honor it yourself, just as evil spirits may. This horizontal kekkai may also mark an area as “private property.” Alternatively, a stone may be placed in the center of a walkway (this is referred to as a sekimori ishi) or garden path indicating that you are unwelcomed to pass into this particular area.

In some traditions, chopsticks are placed horizontally between the meal and the recipient of the meal as a boundary separating the host (he or she who would partake of the meal) from the sacred gift (the food).

In this way, a horizontal wood grain door with Sing Core inside fully supports these philosophies and are increasingly being found in spiritual applications in temples and other sacred spaces.

An added benefit of using horizontal wood grain on your large entry door, is that it is a responsible use of natural resources, as a very tall door (over 10 ft tall) would require special considerations as very long lengths of natural wood are often difficult to find and might require the sacrifice of an otherwise healthy, growing tree. Plus, as custom door builders know, solid wood will move, warp, and crack, unless the door has Sing Core inside.

16 ft. warp-free horizontal grain teak front entry door

For exterior doors, it is generally advised to use a little more material because wood veneer is too thin to offer much protection, is easily damaged, and may be difficult to repair. While a layer of wood (referred to as wood stave) which is between 1/8th of an inch and 1/4-inch is about perfect for any door with Sing Core inside. You might be surprised to discover that 1/8th-inch wood stave is far more dimensionally stable and looks like solid wood.

Exterior doors made with Sing Core inside are guaranteed not to warp, bend, twist, or otherwise fail for fifty years. No other door can offer such a guarantee, further sustainably honoring you and your sacred space.

3x warp-free horizontal grain hemlock doors 14 ft tall

Horizontal oriented wood grain honors the sacredness of Mother Nature’s gift of wood, maximizing its benefits to the world, while offering a sacred protection adding to safety, security, and peace of mind to you and yours. Elements difficult to find in any ordinary large entry door.

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Wooden Door

See: How to Build The Perfect 16 ft. Tall White Oak Door

Sing wooden doors make the best wooden doors in the United States and around the world. No other Eco-friendly lightweight wooden door core is stronger. Weighing in at a fraction of the weight of solid wood door core, patented Sing Core is stronger than steel pound for pound (660 PSI). This is the only way to make a large oversized wooden door that can be guaranteed not to warp, bend twist or otherwise fail for 50 years.

Big Oak Doors

Here’s an example of a pair of 10 x 12 big oak doors, 3-inches thick. These are made using solid oak wood stave (or planks) trimmed thin at 1/8-inch and applied to patented Sing Core engineered substrate.

10×12 ft 3″ thick warp-free 1/8″ oak 520 lbs

The face staves or planks are expertly applied and nearly seamless. If done any other way, these face staves will separate or crack due to movement of the surface area, but because Sing Core does not move, this surface area will remain in pristine condition thanks to inventor Peter Sing’s warp-free contribution to the large wooden door industry.

Close up example of oak wood stave (plank) lamination

The secret to making a big oak door, like this, look like a solid oak door is to use matching oak grain stiles and rails for framing. So instead of edge-banding on the panel sides, you see solid oak wood edges which gives this the impression of being a big solid oak wood door.

extreme close up of corner revealing solid oak stile and rail frame

Choose any available type of wood for your wooden doors with Sing Core inside, such as,

Wood Stave vs. Wood Ply

Wood stave doors can be very costly to make, especially if you’re looking for a lightweight high strength solution for a warp-free guarantee for 50 years. Using Sing Core inside your wood stave door featuring wood planks from 1/8-inch to 1/2-inch will create more potential for warp due to the nature of natural wood grain. This is the beauty of the more economical wood ply option for building your wood door. Wood ply is far less expensive and has alternating grain orientation which also helps to keep the door straight. Wood plywood is just like any other plywood except for its featuring a particular wood grain predominantly on the surface, and it offers far more strength and reparability over time than a less expensive wood veneer. So, if you’re looking to attain similar visual results of a solid wood door at a fraction of a price you might consider having Sing Core inside your wood plywood door. Be certain to specify what type of natural wood plywood your want, if it is available, you can save thousands of dollars on your beautiful wood door. The most popular wood plywood features woods such as white oak plywood, maple plywood, oak plywood, mahogany plywood, walnut plywood, Douglas fir plywood, knotty pine plywood, and birch plywood just to name a few.

FYI See: Patented Sing Paint Grade Doors

 

Wood Stave

AB-Plywood-Trimmed-Skin

American Plywood

Plywood-Panel-Mahogany-Hard Wood Beautiful Skin

Solid Veneer

 

Black Oak Doors

Cedar Doors

Maple Doors

Mahogany Door

Oak Doors

Walnut Doors

Sing Core Wooden Doors

Each professional Sing wooden door can be guaranteed to remain warp-free for 50 years, including a full structure warranty. This is why Sing Core wood doors are making such a huge impact on the door industry across the USA and abroad.

Any type or style of wood door can be made with Sing Core inside, such as exterior wooden doors, wooden barn doors, interior wood doors, wooden sliding patio doors, wood sliding room dividers, wooden French doors, wood stile and rail doors, just to name a few.

Patented Eco-friendly wooden doors with Sing Core inside are proudly made in the USA, using sustainable manufacturing methods using less energy, with responsible use of recycled and renewable resources, including natural wood fiber, producing little or no waste or loss of energy, leaving a negligible carbon footprint.

There is just no other way to make 20 ft. tall wooden doors that will not warp. Wood is a very difficult resource to use for anything over 7 ft. tall because of its tendency to move, especially in exterior wood doors. For instance a wood door that faces the elements on one side and the structure’s interior on the other is going to warp. That’s why no door company guarantees warp resistance of a wooden door for more than one year, that is, unless it has patented Sing Core inside.

So, how can you get wood doors with Sing Core inside? It’s easy, just go to your favorite architect, door manufacturer, mill work, or custom door company, and tell them what size door you want and be sure to ask for, “Sing Core inside.” We cannot sell or ship Sing Core doors directly to consumers or do it yourselfers, as we are the manufacturer supplying Sing Core door core only to door manufacturers and builders of custom doors.

 

Large Wooden Doors

Large oversized wooden doors are the greatest hurdle facing architects and designers, because though there is little more impressive than a huge wooden door to catch your attention, so the bigger the better, but then there’s the issue with warping, which is a constant struggle for the owner to secure regular maintenance of such a beautiful wood door, likely at least seasonally.

Thanks to having Sing Core inside, you will never have to worry about warping wood doors again. While they are built to last for centuries, each professionally guaranteed Sing wooden door can be non-warping and include a full structure warranty for 50 years. No other Eco-friendly, lightweight, high strength wood door can have such a guarantee in the world.

And what if you’re looking to build a large door out of a material other than a natural wood grain? No problem, your doors could be made out of any available flat building material, such as aluminum doors, cement, concrete, fiberglass (FRP), glass, HPL, Kevlar, LVL, MDF, steel (cold rolled steel, steel diamond plate, galvanized steel, hot rolled steel, etc.) as well as the only unbreakable mirror doors, just to name a few.

Wooden Door Gallery

 

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Wooden Doors

The most popular application for wooden doors is accentuated by their prevalence as interior doors. There are a number of reasons why it is common for wood doors to be used as interior doors, the number one reason is that as exterior doors, wood front doors are less stable due to the nature of wood grain to move resulting in warped doors. But not anymore, thanks to warp-free wooden doors by Sing Core.

The two biggest problems with big wooden doors are the (1) heavy weight and (2) tendency of wood to move due to changes in the environment leading to warped doors. Inventor Peter Sing has introduced to and made available his patented and patent-pending warp-free technologies to all industries. The industry which his technological breakthroughs have had the most impact is on the door and window industry.

Known the world over for his contribution to his warp-free wood and the strongest metal in the world which are both lightweight and Eco-friendly, the biggest and best door companies, millworks, and high end custom wooden door manufacturers are seeking out Sing’s emerging lightweight high strength core solutions to enable them to build doors that were either impractical or impossible to build without inviting a host of complications and problems over time.

Door engineers and contractors who would pass on even considering building large wooden doors would pass on that part of the project due to the exposure of not being able to offer a warranty on a large wooden door that would warp not long after installation.

Sing’s core helps empower purveyors of doors to boldly and confidently embrace the idea of providing large wood doors which Sing backs up with his

50-Year Warp-free Wooden Door Guarantee

This is not a misprint or typographical error. Peter Sing personally guarantees each large oversized wooden door that he helps his clients to build to remain warp-free for 50 years. That is to say that if your door has Sing Core inside, it will not warp, bend, twist, or otherwise fail (including lamination) for a full 50 years.

This is a guarantee which is unheard of amidst the door industry, as most wooden doors are not covered by any guarantee, and for those that are, the standard is 1 year and could include a limited warranty of up to 10 years. There is only one way to build a lightweight large wooden door that will not warp, and to do so you must have Sing Core inside.

How to Build Warp-free Wooden Doors

The secret behind Sing’s ability to build a warp-free door is not as easy as it sounds, as he has a team of warp-free wooden door engineers who he refers to as his True Flat Team which reviews every door, its size and active components such as hardware and surface material, as well as its location within the project or structure, and on the planet earth. The True Flat Team helps to design the perfect substructure to keep the door from warping, so every wooden door is a one-off individual work of art.

1. Hybrid Solid Core

Basically, Sing’s patented hybrid solid core includes a torsion box grid, where the grid size is relatively small, two to three inches, which is constructed of vertical grain wood fiber (many times stronger than standard horizontal grain). Each void of the torsion box is filled with a rigid (recycled) foam insert, and this reinforced grid structure is cold-pressed between two stress skins using formaldehyde-free adhesive. This is Sing’s base material, which is the basis of the core used within his strongest metal in the world.

2. Anti-wood-warp Technologies

Depending on the size of the wooden door, the wood species (and its thickness) hosted on the wood door’s exterior, the application, hardware, and location of the door, additional anti-warp and strengthening material may need to be added to the warp-free substrate to compensate for the additional concerns and challenges. Note that types of door hardware, such as side hinge, pivot hinge, or sliding door hardware, all have different inner configurations, specially designed for each application.

3. Solid Wood Doors

For that “looks like solid wood” effect for which Sing is renowned, solid wood edges matching the natural wood grain featured as the door’s surface material are added to give the appearance of solid wood doors when finished. You can see why doors built with the solid wood edges are featured at the top of the World Trade Center.

4. Apply Surface Natural Wood Grain Material

Sing’s factory has a unique expertise in the area of applying different surface materials to his warp-free substrate though since he supplies his patented products to door companies and millworks, more than half of them ship without door skins, and these are applied at the door company’s factory or in the millwork’s shop. Some will feature solid wood stave planks, others will host various wood veneers.

As is the rule, Sing’s factory does not finish the doors, apply hardware, or pre-hang the doors. This is all done by the companies that make Sing’s door look so magnificent in the field.

What to Expect from Sing’s Wooden Doors

When your wooden door with Sing Core inside is completed and installed you can expect to enjoy all the benefits of owning such a door.

1. Eco-friendly 2. Increased sustainability
3. lightweight 4. High strength
5. Dimensional stability 6. Warp-free technology
7. Sound dampening 8. Increased climate control
9. Save on maintenance cost 10. 50-year no-fail guarantee

You will agree, just as all the other door companies now know,

“There’s no other way to do it.”

Get a free drawing and Price Quote today.

 

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Warp-Free Wood

Introducing warp-free wood to the woodworking industry is a tough nut to crack.  Since mankind has begun to craft items from wood, it is known that natural wood grain is so elegant, but the fact remains that the wood continues to respond to the elements even after the tree is harvested for building materials.

Of course, some wood grains have a greater propensity to move than others, and only some designs can accommodate a certain degree of movement.  For instance, the American Institute of Architects (AIA) allows for this movement in wood doors.  They say if a door warps ¼” or less along a 7 ft. span, this is considered a straight, not warped door.  Manufacturers of door hardware, pre-hangers, and installers all allow for this movement of doors that are considered to be straight.

That was prior to inventor Peter Sing’s introduction of his patented and patent-pending warp-free wood technology.  Door configurations are made of warp-free wood panels, but Sing Core’s warp-free wood in also available in warp-free post and beam configurations as well.

You can see how this might affect the woodworking industry, a market segment that for many years, an idea of having a warp-free wood product would be inconceivable.

Yet, here the door industry is, embracing Sing Core’s warp-free technology wholeheartedly.  The best door companies, millworks, and custom manufacturers of large or oversized doors all rely on Sing Core to solve the problems associated with warping wood.  This is particularly a pressing issue when considering whether to take a project that features larger doors.

The main concern is that those huge doors are going to warp, and everyone knows that.  It is increasingly difficult to build and maintain customer confidence when offered a warranty on the entire project, but not the oversized doors.  Those will not be covered, and the builders don’t particularly want to be tasked with servicing them.  Then, the customer is referred to a company which exists only to service and repair failing doors.  Yes, this has created a whole new sub-industry for door repair shops.

Now, there is a solution:

Warp-Free Wood

Now, door companies who rely on Sing Core’s warp-free wood to solve the problems of warping wood doors can include and cover those oversized doors with their standard warranty.  Maybe their standard warranty is 10 years.  No problem, because they are also covered by Sing Core’s

50-Year Warp-Free Guarantee

Yes, wooden doors made with Sing’s core inside are guaranteed not to warp, bend, twist, or otherwise fail (including delamination) for 50 years.  A claim like this is unheard of in the wood industry, and no other Eco-friendly, lightweight building material could come close to making such a promise.

And as these most prestigious architects, engineers, companies, and craftspeople know and confess,

“There is just no other way to do it.”

That’s what they all say.

Of course, many other things could be made of Sing Core’s warp-free wood.  But, large doors lead the pack; because the bigger the door, the more prestigious the project.  There is only one way to keep it straight and true.

Accomplishing such a feat is not easy.  Sing Core has an entire team, referred to as his True Flat Team, which reviews all the aspects of every door.  This includes the proposed materials, the application, where the door will be located (structurally and geologically), and how its interior should be designed to accommodate its regular use.

Highest Precision

High-end projects and discerning clientele only want the best and insist on having such precision with Sing Core inside their doors which boasts .006-inch tolerances, besides being warp-free.