July 8, 2019 Ivan Grantham No Comments

SingCore Curved Door — Custom Oversized Warp-Free Curved Door Panels

SingCore Curved Door

Bring your architectural vision full circle with the SingCore Curved Door — the only custom curved door system engineered to combine lightweight construction, warp-free performance, and a 50-year structural guarantee. Built for the world’s most ambitious architectural spaces, it delivers unmatched precision and long-term reliability at any size or radius.

The Ultimate Warp-Free Custom Curved Door

Bring your design vision full circle with the SingCore Curved Door — the only lightweight, warp-free curved door system backed by a 50-year structural guarantee. Whether for a luxury residence, commercial lobby, or museum installation, SingCore’s patented torsion-box core makes it possible to achieve any radius, size, or finish with unmatched strength and stability.

Why Architects and Builders Choose SingCore

Warp-Free for 50 Years – Our patented core eliminates the twisting and distortion that affect traditional curved doors over time.
Lightweight, Strong, and Rigid – Up to 80 % lighter than solid wood or metal while maintaining exceptional structural performance.
Custom Radius Options – Built to your exact curve or arc specifications — concave or convex.
Compatible with Any Skin – Choose veneer, paint-grade MDF, marine plywood, HPL, metal, or other specialty materials.
Sustainable and Eco-Friendly – Made in the USA using renewable materials and minimal adhesives.

Curved Door Installed (Photo courtesy of Wirth Woodworking)

Custom Curved Doors for Specialty Architectural Applications

SingCore curved doors are engineered for architectural and high-performance environments where precision and reliability are essential. Each door is manufactured to exact specifications — radius, thickness, size, and finish — ensuring perfect integration with complex design elements and demanding installations.

Typical applications include:

Curved pivot doors
Curved sliding doors
Arched entryways
Radius wall systems and structural feature walls
Specialty architectural enclosures

Engineering Excellence Inside Every Panel

At the heart of every SingCore curved door is our patented torsion-box honeycomb core, providing a superior strength-to-weight ratio and warp resistance unmatched by traditional construction methods.
Unlike foam or solid cores that can swell, split, or distort under environmental stress, SingCore maintains precise curvature and structural integrity for decades — even in large or complex configurations.

Technical Highlights:

Custom-engineered thickness and radius to meet your design requirements
Exceptionally lightweight while maintaining structural rigidity
Compatible with standard or custom hardware systems
Fabricated for both interior and exterior environments

Frequently Asked Questions

What is the maximum size for a SingCore curved door?
There are no fixed limitations — each panel is custom-engineered to your specifications.

Can you build both concave and convex doors?
Yes. Our process accommodates any radius curvature, including compound shapes.

Can I apply my own veneer or finish?
Yes. A hot-press-ready option allows you to apply veneer or laminate locally.

Do you build exterior-grade curved doors?
Yes. Exterior versions are fabricated with marine-grade materials and weather-resistant bonding systems.

How do I request pricing?
Provide your dimensions, thickness, radius, and skin preference to receive a custom quote.

July 1, 2019 Daniel Sing Core No Comments

Oversize Custom Fire Resistant Doors

Sing core material is not naturally fire retardant, but gain the fire retardant properties of their skin materials. Sing panels can be made with almost any skin, common varieties include:

Plywood, MDF, Masonite
Formica, HPL, or other plastics
Metal such as steel (cold rolled / hot rolled), aluminum, copper
Dry wall
Other interior finishes

We make our panels directly based on your exact specifications, so all you need to do is choose the skin with your desired level of retardation, and we will deliver.

For a highly fire-resistant door with the surface skin of wood, we have the option of layering several skin materials with outward facing wood stave or wood veneer. Therefor you can have the look of beautiful wood on the outside but the safety of highly fire resistant materials on the inside.

June 17, 2019 Daniel Sing Core No Comments

Walnut Sliding Doors

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Walnut Sliding Door 148 1/8″ tall x 53″ wide x 2″ thick. Solid 1/8″ walnut wood stave skin.

Looks matter! For a super light weight cutting edge modern door design, Sing Core is your best bet.

This beautiful walnut sliding door is 148 1/8″ tall x 53″ wide x 2″ thick. Solid 1/8″ walnut wood stave skin gives a natural look that is both modern and stylish. Yet our panel is one third the weight of wood yet stronger than steel by weight

Exterior Sliding Walnut Doors

Our panels look amazing outdoors and in doors. Strength of Sing Core panels include:

Core is mostly highly insulated foam with an internal wood structure
Sound deadening characteristics
Weather proof (when properly finished).
True Flat means door remains easy to operate and tightly sealed for the lifetime of the door

Interior Sliding and Pocket Doors

The beauty and sound deadening properties of sing core doors are doubly appreciated when used as an interior sliding. Furthermore, interior sliding doors can be frequently operated, such as closet doors or large room dividers. Such frequent use is facilitated by the light weight nature of the panels. Yet the dense and strong construction feels like a solid piece of wood to the user.

9′ Tall Walnut Wood Veneer Door Panel

Walnut Double Sliding Patio Doors

If your are in need of a distinctive, one of a kind, custom made patio door for your project, look no further than Sing Core. Every one of our panels is made custom — to order — to meet your precise specifications.

Custom blocking, light cut outs, edging, and other features can be included or removed to meet your needs and pricing concerns.

Panels can be used in any door application, including sliding and double sliding doors. The same panel, with different internal support and blocking, works perfect for pivot doors, hinge doors, overhead garage doors, carriage doors, pocket doors, and hidden doors.

12′ Tall Walnut Wood Stave Door

Walnut Sliding Door Hardware

SingCore doors do not come with hardware, but are designed to work with the hardware of your choice. Any commercially available hardware or custom hardware package can work with our doors provided they support the weight required.

In order to match with the hardware of your choice, SingCore embeds custom solid wood blocking in the core of the panel around the edges, measured precisely to meet with your hardware configuration.

SingCore panels can be worked just like wood. And, will be familiar to millworks, cabinet makers, wood workers, and contractors who have experience with traditional doors.

SingCore is the best choice for your project!

Sliding French Walnut Patio Doors

Sliding french patio doors offer a distinctive look for the discerning home owner.

Sing panels are uniquely suited for french doors because of their ability to be cut in to any configuration of windows or light openings to suit your need without loss of strength.

Consider our panels to be the clay for your sculpture. We can form them to meet almost any need, any size, any thickness, and any surface material.

Contact SingCore today and request a free consultation and estimate for your project.

12′ Tall Walnut Door Only 177 lbs

Pivot Door Gallery

: Walnut Pivot Door Edge View

: Walnut Pivot Door Edge View

: Walnut Pivot Door

: Walnut Pivot Door Edge View

May 20, 2019 No Comments

Jib Doors

About Jib Doors

Jib doors are also known as hidden or invisible doors because they are decorated to look like the wall with concealed hinges and hardware. It’s very important for your jib door to remain perfectly straight so as to maintain the seamless appearance in the wall hosting the jib door.

Little more is important in the creation and operation of a jib door than maintaining high precision over the life of the door. If the door warps, you lose the advantage of having a secret door that gives access to an otherwise inaccessible area. That’s when a door is no longer a door, as it just becomes another part of the wall, or will not secure properly, or exposes the otherwise invisible door because the material is either twisted or bent.

There’s one way to build a perfectly straight jib door, even if it is very large, and remain perfectly straight. In fact, inventor Peter Sing has been doing just that by providing the biggest and best door companies, millworks, and high end custom door manufacturers with his patented and patent-pending warp-free jib door materials. And that might leaving you to ask, “How good could they be?”

They are by far the best warp-free materials on the planet used to build the very best Eco-friendly lightweight high strength in the world, which can be

Guaranteed Warp-free for 50 Years

Let there be no mistake that Mr. Sing could not make a claim if even one of his high end clientele reported that his material failed, after being in service for more than 20 years. Sing has not had one such claim. This is his specialty.

Sing has created his top shelf True Flat Team, which designs and creates each custom door core which is built using his patented and patent-pending warp-free technologies to make incredible doors, even of enormous size, which will not warp, bend, twist, cup or otherwise fail, including delamination, for 50 years.

There is no other way to accomplish such a feat, and as you might have guessed, if there were such a way, those big door companies would be doing it. To this day, they admit,

There’s just no other way to do it.

Jib Doors

Jib doors must maintain the seamless appearance of just being a part of the wall, except in the instance of a bookshelf doorway, where the door itself is also a functional bookcase on one side of the door using the same concealed hinge and door securing mechanisms as the invisible or hidden door, like these classic hidden hallway doors.

Of course, it all depends on the size of the opening and the construction of the existing wall that will host the jib door, too. The hidden door will have two vertical seams which need to remain flawlessly straight and true to remain invisible to the naked eye. Unless the doorway will span from floor to ceiling, there will be a horizontal seam at the top of the door which may also need to appear the be seamless.

Hailing from the Old World, jib doors have made there way to the Americas. While no longer used to conceal clandestine activities, including one or more jib doors in your contemporary architecture design project is growing in popularity and is influencing the design, engineering, and building of invisible jib doors. There is no longer any suspicion or negative implications, or having to answer the question, “Why do you have a jib door?” Jib doors are a growing segment among modern doors.

If your jib door is warped, the seam will become visible thereby defeating the purpose of having a hidden door if it no longer appears to be an invisible door at all, and the door’s secret is blown. That’s where Sing Core comes in.

Millworks and high-end custom door manufacturers know they can rely on Sing Core’s ability to provide a warp-free job door blank which will remain straight and true enough to protect the hidden door’s secret of invisibility over time.

If you’re dreaming about having a very large jib door, like a floor to ceiling full moveable wall, Sing Core’s light weight (weighing-in at a fraction of other solid jib door cores) and high strength (660+ PSI, stronger than steel pound for pound) enables architects, designers, and engineers to realize a full articulating wall, which can pivot, swing, or slide open and closed easily via cell phone. Where there once was a wall, there is none and you have full access to the space.

Make a Whole Wall Disappear

Then there’s this case; What if you wanted the whole wall to be a door. Here’s a job where the client wanted to whole exterior wall converted to bifold jib doors. No problem, if they have Sing Core inside.

Just an ordinary exterior wall. Right?

Extraordinary exterior bi fold doors!

Plus, if your invisible door has Sing Core inside, you get the added safety and security of having a fully insulated sound deadening jib door which is also highly effective in maintaining consistent temperature control on either side of the wall door.

And if that’s not enough to make you insist on specifying Sing Core inside your next architectural jib door, consider this:

Your jib door could be backed by inventor Peter Sing’s unparalleled 50-year warp-free guarantee. Sing’s jib door cores are guaranteed not to warp, bend, twist, or otherwise fail (including full structure and delamination) for a full 50 years.

No other Eco-friendly lightweight high strength door can compare in terms of weight vs dimensional stability.

: Invisible Door

: Hidden Hallway Doors

: Secret Compartment Door

May 3, 2019 No Comments

New Generation of Wood Doors

New Generation Wood Doors are the new generation of wood grain doors available with patented Sing Core inside.

: Butcher Block Maple

The perfect combination of durable damage resistant beautiful wood grain surfaces and rock solid lightweight insulated vertical grain torsion box interiors, resulting in the most versatile Eco-friendly warp-free doors, guaranteed for 50 years!

There’s never been a better wood grain door to hit the streets with such beauty and grace with the highest precision and long-standing performance records, while being guaranteed not to warp, bend, twist, or delaminate for 50 years.

New Generation Doors are high pressure laminate doors which have incomparable value in comparison to other HPL doors available thanks to using patented Sing Core as the expert door core. Sing door core is the same product used in multi-million-dollar mansions, by the military, in the tallest building in the United States’ Freedom Tower, by Ivy League universities, and NASA. Now you can have your piece of the good life, and rest at ease knowing your New Generation Wood Door has Sing Core inside.

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

New Generation Wood Doors are perfect for owners and managers of high-end high traffic establishments such as hotels, government facilities, universities, schools, medical buildings, hospitals, and the health-care industry as double egress doors, or as patient room doors.

: mahogany wood grain

Nearly impervious to damage, New Generation Wood Doors have all the elegance of solid wood doors, featuring a solid composite door core material that is lightweight and will withstand the test of time. They make the perfect replacement doors for hospitality industries, and high traffic entertainment venues such as stadiums, and casinos.

In comparison to her shirt-tailed cousins, the natural wood laminate doors, which are prone to deterioration and easily damaged, New Generation Wood Doors are HPL laminate doors that are known for their long service life and are nearly impervious to surface damage.

In factories and intense production facilities, New Generation Wood Doors are resistant to heat, steam, moisture, and water, making them the hands-down door solution in industrial environments.

For use in Multi-family dwellings, condominiums, and apartments, cleanup is quick and easy business, as New Generation Wood Doors sport a smooth, non-porous surface which can easily be cleaned by wiping them down with a damp cloth for superior functionality and hygienic regular everyday use.

: pear wood grain

: teak wood grain

No other door has such superior performance in terms of durability and strength. New Generation Wood Doors feature unparalleled impact resistance and resistant to surface damage, shock, scratching, denting, gouging, or otherwise scarring.

In keeping with Sing Core’s commitment to helping to create a better future world for all earth’s creatures, New Generation Wood Doors feature HPL laminate made from renewable resources and manufactured in an environmentally friendly process, preserving precious timber for other applications, thus protecting domestic and exotic trees.

If you’re cost conscious, HPL laminate doors are a fraction of the price of their natural wood stave alternatives, without having to sacrifice a thing, in fact, you get so much more with New Generation Wood Doors designed and build to last for centuries, and,

“The first 50-years is on me.”

-Peter Sing, President and Inventor of Sing Core

New Generation Wood Doors, the new generation of wood doors with all the beauty and elegance of solid wood doors at a fraction of the price, which are lightweight, stronger than steel, and guaranteed warp-free for 50 years.

Step into the next generation of wood doors with New Generation Wood Doors.

High-end clientele, see our authentic wood doors, which also carry our 50 year guarantee.

April 8, 2019 Daniel Sing Core No Comments

Architectural Sliding Doors and Walls

Nothing says “professional” like the unique quality of Sing Core’s patented custom architectural sliding doors and walls. When other manufacturers see our product, they wish they could provide the highest quality in terms of lightness, strength, and straightness that we deliver. Unfortunately for them, we must humbly say, our product is the better of the two.

Designed for High Budget Projects

By design, our panels work best for high budget projects that need something exceptional for their project. Our panels comes unfinished and potentially untrimmed, with the custom skin variety of your choice, ready for finishing and hardware.

Sometimes customers ask us, “should I use this panel in high-end 10+ million dollar house projects?” Our answer is yes!

When it comes to architectural doors of any variety, including sliding, pivot, carriage, moveable wall, hinge, or anything else.

Modern Solutions for Sliding Doors with Volume Based Pricing

With commitment to clean design, premium materials, and high quality craftsmanship in every architectural sliding door panel we manufacture to your specification.

Featuring monumental panels, the Sing Core door system allows for stackable or pocketed configurations with a practically unlimited numbers of panels. With almost unlimited frame material choices, Sing Core samples complement any architectural style helping you meet the design goals and performance criteria of your project.

Sing Core offers our clients a range of options and materials for every type of high volume, medium volume, or low volume project. Along with our excellent customer service, we can guarantee your projects success.

Custom Size Patio Doors

We make doors of any size based on your specification. Architects, millworks, and contractors of all varieties can benefit from our flexible manufacturing methodology that excels where others fail and exceeds where others cannot!

Successful Client Relationships Begin with Mutual Satisfaction

In business, just like life, both parties must be happy after the interaction. That is why Sing Core operates under the philosophy of fair exchange. This is what we call “fair.”

To make sure you are left smiling after we are done, we offer an unprecedented and unparalleled 50-year structural guarantee on every professional level panel that we make. That way you and your clients have no fears of the future with our product. Should the unthinkable happen, we will replace your panel no questions asked once proved unworkable.

Find the Right Fit For Your Next Project

Sing Core knows that high end products required a wide variety of materials to be successful, and we have you covered. No matter whether you need:

Wood Stave: oak, alder, cedar, mahogany, teak, pine, fir, or anything else you can imagine
Wood Veneer: oak, alder, cedar, mahogany, teak, pine, fir, or anything else you can imagine
Metal: Cold Rolled Steel, Hot Rolled Steel, Aluminum, Copper, or anything else you can imagine
Formica: any color, glossy, matte, marker board, chalk board, or other

Find the Sing Core Panel that Best Meets Your Needs

Ordering with Sing Core is simple: just provide us with length, width, thickness, skin material, blocking requirements for you door, shipping destination, project budget, project timeline, and contact information. Then we get back to you quickly with a fair price on custom panels to meet you specifications. See our new C Series line of Affordable Barn Door and Sliding Closet Doors.

February 7, 2019 Ivan Grantham No Comments

Hinged Door Gallery Pictures Photos

: Peek-a-Boo (SO-P)

: Thin Slat Door (SO-T)

: Slat Door (SO-S)

: French door (SO-F)

: Insulated Walnut Door

: Lightweight Ceramic Door

: Paint ready with lite cut outs

: Finish and/or paint doors to specs

: Honeycomb sandwich unfinished door panel

December 26, 2018 Ivan Grantham No Comments

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.