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Patio Doors

When you’re not just looking for any patio doors, there’s a good chance you’re looking high and low for the best patio door to suit your needs, your particular taste(s) as well as beautiful patio doors. Normal, off the shelf patio doors are not going to suit what you want in a patio door. Chances are you’re looking for the best patio doors, doors that are not your run of the mill patio doors, but unique one of a kind patio doors.

If you really want the best patio doors, you will need to enlist the skills and artistry of a local millwork or custom patio door manufacturer.

Sliding Patio Doors

Sliding patio doors are the most prevalent and sought after styles of patio doors, which can and often do include several sliding patio doors in succession including overlapping sliding patio doors which are also called bypass sliding doors because one door slides over another door panel, which may or may not be a sliding patio door. Depending on the design, one or more patio doors may be stationary.

The best sliding patio doors featured in high end homes are made with wooden sliding doors that feature large glass window lite cutouts. It stands to reason, if you’re going to have a nice patio, you’re going to want to enjoy it both from the inside and the outside of your home. So, unless you’re primary concern is high security patio doors made of Kevlar or featuring Lexan clear polycarbonate, you’re going to want sliding patio doors with a view (glass installed).

French Patio Doors

Those sliding patio doors with the big glass cutouts? We call them French patio doors. By definition a French door is a usually a wood door featuring a large window glass pane. Sliding French doors allow you to enjoy the beauty of the outdoors regardless of the time of year. French doors are Eco-friendly in that they maximize the availability of the natural lighting.

If your French patio doors have Sing Core inside, they are lighter in weight and also insulated for climate control as well as possessing sound deadening qualities, thereby maximizing your investment in the most Eco-friendly French patio doors.

While the sliding French patio door is intended to provide access to and from the patio area, they are also elementally and visually impressive enhancing the overall appearance of any patio access area. Sliding French patio doors are by far the most elegant patio doors, and backed with Sing Core’s 50 year warp-free and structure guarantee, are the most sustainable patio doors.

Wooden Sliding Doors

Since wooden sliding doors are the preferential choice of designers, architects and owners of the most expensive homes ($20 Million & up) chances are these are going to be wooden sliding doors which are featuring large lite cut outs and are likely to be very tall, which could be 9 to 16 ft. tall wooden sliding doors, or even taller sliding French patio doors. Wooden sliding doors (especially if they are large sliding doors) present a number of challenges for the architects, designers and millworks or custom door manufacturers who build them. The number one problem with any long span of wood is that it will warp. It’s not a matter of if the large wooden sliding door will warp, but when it will warp.

That’s why it’s so important to have Sing Core inside your large wooden sliding doors, because a warped wooden sliding door which does not open or close is not a door at all. Although, if your door has a large window glass pane lite cutout, you will still have the view, so even if the door fails, your wood French patio door can be a French patio window.

The most conscientious, wisest and efficient designers and architects increasingly are specifying that all their large wooden sliding doors and wooden French patio doors have “Sing Core inside.”

Sliding Door Design

The design of sliding door, and sliding doors in particular, can be complex and may require a true team approach to the sliding door design. The architect can specify the sliding doors, and the designer (who may also be the architect or the owner) knows what they want. The concerted efforts of the custom patio door builder or manufacturer, the millworks, (as well as Sing Core, if specified) and the install team, must work in tandem to solve all the pending challenges that may arise from the sliding door design.

Extra care must be taken in the selection of the sliding patio door hardware, ensuring that it is rated for exterior use, and also matched to the weight of the sliding patio door as it was designed. The weight of the sliding patio door dictates the types and styles of sliding patio door hardware which will be necessary for improving performance and reducing maintenance over time.

For patio doors that have solid warp-free Sing Core composite core inside, these patio doors will be lighter in weight than other solid core doors, reducing the cost of what otherwise might require heavy duty sliding door hardware, which can cost many times the cost of the sliding doors themselves.

Modern Patio Doors

In this day and age, modern sliding doors need not adhere to the same design characteristics as their sliding patio door forerunners. In the most contemporary architectural designs custom lite openings can be designed which contrast wildly in comparison to earlier traditional designs.

It is common for Sing Core to pre-cut custom lite openings in modern patio doors based on the visionary drawings of the contemporary architect, designer or owner.

By altering and creatively designing the glass openings in an otherwise sliding French door configuration, a unique glass design and install can increase the effective curb appeal and radically enhance the perceived value of a home, when the owner desires to be uniquely separated from the pack.

Plus, high end modern patio doors need not be limited to being manufactured of wood. You could be looking at modern hot rolled steel doors for your patio. You might see these highly individualized, one-of-a-kind patio doors made of hot rolled steel, copper, or concrete, because custom patio doors with Sing Core inside could be made of any available flat building material.

50 Year Patio Door Guarantee

It’s obvious that your patio doors are exterior doors and exterior doors are always problematic because one side faces the inside of the structure and the other side faces the elements. Only professional patio doors with Sing Core inside can be guaranteed not to warp, bend, twist or otherwise fail for 50 years, including full structure warranty.

The Only 50 Year Patio Door Guarantee

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The Best Sliding Doors

Sliding doors are the perfect way to complement to your home’s individuality. Sliding doors are ideal for smaller spaces, due to their space saving nature. Some sliding doors even slide completely out of sight and into the interior of the adjoining wall. These doors create a pristine and merely seamless entrance to any room. We are glad to provide you with the best sliding doors in the industry.

Sliding doors consist of one or more door panels that open by either gliding on a track or hanging from rollers mounted above. This style of door is very sensitive to weight, as the entirety is often hanging from the top of the door jamb. If the doors are too heavy, this can cause some serious and potentially dangerous issues. Sing Core have the solution to these issues.

Traditionally built sliding doors have a tendency to warp over time. That may not seem like a big deal, but it can make the door fall from its track. It is very dangerous when this happens especially when someone is nearby… Ouch! Whether your sliding door is a patio style door or a sliding closet door, its best to have it lightweight and truly flat for the entirety of its lifespan.


Sing Core provides the best substrate to make very lightweight doors that will remain truly flat for many years to come. With our patented technologies we can manufacture high strength, yet lightweight, sliding doors that last a lifetime.

Our sliding doors are among the best sliding doors in the industry. With our technologies, our doors tend to weigh roughly one third of traditionally built doors. How can we do this?

We use our patented torsion box honeycomb reinforcement along with our patented composite stiffeners to ensure a perfectly flat door for many years to come. Our technologies are always evolving to bring you the best doors in the industry. When you want the best, you have to work with the best. That’s why you come to-




Our company is devoted to providing only the best substrate for your door needs. Whether it is a luxury entrance door or a simple closet door, Sing Core has you covered. We manufacture the best sliding doors for existing homes in need of an upgrade and also for new constructions. Our doors will always enhance the aesthetic of any home.

Our technologies are so advanced that we guarantee every door for 50 years! No other door company has guarantee for even half of that amount of time. Usually, other door manufacturers will guarantee their doors for about a year; but shortly after that time, the doors will warp and potentially fail.

Why worry about your sliding doors?

There is no need to worry when you have Sing Core inside! Sing Core provides high strength and long-lasting dimensional stability so your door will be truly flat and last a lifetime.

We offer many different skin choices. Our choices range from concrete, metal, fiberglass, exotic woods, MDF, to even plywood. Click here to see our skin choice page. We specialize in custom doors, so if you do not see what you need just ask!


To order, go to our pricing page and fill out one of our pricing forms. This is the fastest way to get in contact our salespeople. Click here to go to fill out a pricing form.

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Interior Sliding Partition Doors

Interior sliding partition doors are all the rage these days when maximizing and consolidating space is of high importance. Nobody knows that better than our friends in New York, where most of our sliding room dividers are installed to quickly create an insulated sound deadening room partition.

Interior Sliding Partition Doors

Our premiere interior sliding partition doors allow anyone to reconfigure living space quickly and easily using sliding partition doors with patented Sing Core inside. You can easily add a sliding hanging door using inexpensive barn door hardware to create a separation between rooms, or you can divide an entire room in half by using multiple sliding barn doors in a side-by-side configuration to create separate rooms, then open them back up when you want to access the entire space again.

Interior sliding partition doors can take on many appearances, as sliding doors, or many doors can be assembled as a modular moveable partition wall on site and installed without the heavy equipment necessary to hang an enormous sliding room divider and room partition.

What makes interior sliding partition doors with Sing Core inside so in demand in NYC?

The demand is greatest in NYC due to the city’s tendency to grow upward. Tenants are discovering new ways to divide up the living space, and entrepreneurs are finding new ways to divide office space. Installing a sliding room divider or room partition is an inexpensive approach. Bit when your room dividers’ doors have Sing Core inside, you enjoy other benefits that can not be achieved any other way.

Inventor, Peter Sing, has provided to room partition industry his patented Sing Core material to make the best interior sliding partition doors in the industry. Here are the characteristics you can expect,

1 – Lightweight. Sing Core is a lightweight solid hybrid sliding partition door that weighs in at a fraction of any other wood-based solid core door, making it easier to handle, maneuver, and install.

2 – High Strength. Even though a sliding partition wall with Sing Core inside is lightweight, it is not weak, as Sing’s patented core is stronger than steel pound-for-pound and has been independently University rated at 660 PSI, and is used in impact door applications.

3 – High Precision. Sing’s patented core is one of the highest precision cores in the industry sporting +/- .006 in. tolerances, which is of concern for the high-end projects, like the Freedom Tower, One World Trade Center, the tallest building in the country.

4 – No Size Limit. Floor to ceiling, no problem, 20 to 50 ft. wide, no problem. Due to Sing’s lightweight, high strength, and high precision, the largest door companies and best millworks in America are able to make enormous sliding partition doors of any size.

5 – Fully Insulated. Sing’s hybrid solid core doors are fully insulated for sound deadening and climate control, which is used in soundproof and refrigeration applications. Tenants enjoy the insulation for controlling heating and cooling while increasing privacy and security.

6 – Any Type of Door. A door with Sing Core inside could appear as any type of door for the prefect aesthetics and could be made of any desired flat building material. Most common are natural wood grain, MDF, and metals.

7 – Warp-free. The most impressive characteristic of Sing’s room divider doors is that they are guaranteed not to warp, bend, twist, or otherwise fail for 50 years. Undoubtedly, to date, there has been no way to build such an impervious non-warping door. That is, unless you use Sing’s core.

The biggest door companies and best millworks in the USA use Sing’s patented core, especially in their projects calling for doors that are over 4-0 8-0, because they say,

“There is no other way to do it.”

If you are an architect, designer, or door engineer, and you are considering sliding door room dividers for your next project, you would be well advised to spec Sing Core inside your high end and modern sliding doors used as partitions, or operable partitions and movable walls for flawless performance over time.

And don’t forget, it is the only way to create a sliding door with a,

50-year Warp-free Guarantee

Doors with Sing Core inside can be guaranteed not to warp, fail, twist, or otherwise fail (including full structure) for 50-years.


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Secrets of Warp-free Large Sliding Barn Doors Revealed

Large sliding barn doors are an important feature in the biggest warehouses and industrial locations in the United States, from military to aerospace a big sliding barn door is often specified in the architectural designs for practicality and ease of use. But the larger the door opening the harder it is to keep these huge sliders from warping. If you cannot keep the door straight, you may have reduced access due to door failure.

Ceiling mounted barn doors 14 ft. x 3.5 ft. x 2.5 in.

For years, inventor Peter Sing’s patented warp-free sliding barn door solutions have been the answer to these massive sliding barn doors, which using his patented and patent-pending anti-warp solutions can be built lightweight, high strength, and be guaranteed not to warp for 50 years, unheard of before the invention of Sing Core.

Ceiling mounted barn doors closed

Entryway door


If you would like to see the story behind the doors pictured above, click here or either photo.


Interior Barn Doors

As interior design has evolved, the integration of interior modern barn doors in everything from residential to commercial projects has seen rapid growth. Of course, standard-sized interior sliding barn doors do not pose much of a challenge, but if the door exceeds 8 feet tall or a 4-foot width, now you are heading into dangerous territory if you are hoping for a non-warping sliding barn door.

Commercial Steel Barn Door

Warped Large Sliding Barn Doors

Regardless of the application, large sliding barn doors are going to be problematic, so much so that years ago, the biggest door companies in the USA excluded offering the large barn door from their door schedules, instructing contractors to seek out custom door makers or millworks, because they could not cover these enormous sliding barn doors with any warranty because they were destined to warp and fail not long after installation.

After a while, even the millworks started turning down jobs for large sliding barn doors for the same reason, too many service calls during the warranty period, though this did open a door for door service companies whose job it was to regularly maintain doors, though this was extremely expensive for end user of the warping big sliding barn door.

Not Faulty Design

The problem, it turns out was not with the design, as large sliding barn doors were both stylish and practical, so the architects could not be blamed. The problem is with the limitation in building materials. A dimensionally stable door could be made of a thick solid material such as solid steel, but the bigger the door gets, even solid steel will move according to changes in the environment. Sing is able to bring the ideas of the architects and designers to life in such as way as to provide a 50-year solution to such visionary ideas.

Barn Door Veneer

Warp-free Solution

When inventor Peter Sing introduced his warp-free technologies to the large sliding door companies, they embraced Sing’s solutions for warped large sliding doors. Thanks to Sing, they were able to get back into the oversized door market once again. According to them, in their own words. Sing’s core,

“Is the only way to build a lightweight warp-free large door.”

The only way.

Commercial Steel Barn Door

A Door is Not a Wall

It is important to learn what the core structure is made of. Doors are not the same as walls. Doors need to move repeatedly everyday while walls are permanently placed. Walls commonly use 2” x 4” framing methods which do not work well for building doors. If the structure of the door is not strong, it will not feel or sound very solid. When you close the door, there will be rattling sounds and/or it can deform over time. It is very easy to tell, all you have to do is close the door and hear how strong or solid the door is made. It may look the same, but it does not sound the same. You can tell the difference by knockings on the door, you can tell what is inside. Solid like a rick but still light like a feather when you swing the door closed. The structure of the door that makes the difference, not the door skin.

You Want a Warp-free Large Sliding Barn Door

We already know you want a large warp-free sliding barn door. How do we know? Because Sing’s email servers are filled with people asking about how they can get a sliding barn door with Sing Core inside? Unfortunately,

Sing Core Does Not Sell Doors

Even though sliding barn doors with Sing’s core inside are among the best doors in the world, Sing’s factory does not build doors. Rather, they provide the raw warp-free base materials to the door building companies and millworks who create the enormous warp-free sliding barn doors, that the inventor is credited with, even though Sing only provides the base material. So, if you really want one, just contact your favorite door builder or millwork and tell them you want a door, “with Sing Core inside.”

What is the Secret?

How to Build a Large Sliding Door

Undoubtedly, you have wondered how does Peter Sing build such large lightweight sliding barn doors that are stronger than steel pound for pound and can be guaranteed not to warp for 50 years? Following are the methods that Sing uses to build warp-free doors of any size, made of nearly any flat building material, secrets revealed.

First, the architect or door engineers, specify the door dimensions and the material that the door will be made of, and submit the specs to Sing’s True Flat Team. The team goes to work, gathering all the data necessary to predict what the challenges will be for the door. Questions like, will it be an interior or exterior door? Will it be exposed to the elements? In what geographical location will the door be installed and at what altitude? Which direction will the door face?

The team starts with Sing’s patented rigid foam reinforced torsion box core, then add additional patent-pending anti-warp technologies to compensate for exterior door skins and environmental concerns.

That is the secret inside these huge warp-free doors.

How Can You Ship Such Large Doors?

Of course, the military can do amazing things with transportation that cannot be accomplished by mere mortals, so Sing has created a modular technology that supports his 50-year guarantee. In this manner, any size of door can be built and shipped in high precision sections that are assembled on-site.

Joining a modular door shipped in sections

This saves so much on shipping and handling costs, and if the large door needs to fit in an elevator or tight doorway, not problem. High precision modular solutions are the answer. Sing Core has built many large doors that are joined on-site without any warping.

Don’t try this at home. Average dowels and even larger biscuit-joining will not prevent door warping. Let’s say you wanted to build a pair of 10’ x 20’ double barn doors that were 2-inches thick. Stacking and joining four 5’ x 10’ x 2” panels together will not be an easy task. But Sing Core has had many years of experience with oversized doors, and has been devoted to solving the common issues with larger modular doors.

If you have a good budget, high precision demand, and no issue accessing the job site then a one-piece large door panel is the way to go, if it can be shipped to your location.

Otherwise, modular door sections joined on-site will be the best option. There are two major factors to achieve high quality when building large doors. One is to make sure there is no warping once the modular sections have been joined. The second issue is maintaining a high precision joint line so that it is not noticeable. This requires a very high precision core to achieve. Sing Core is the most precision door core available, with a tolerance of ± 0.007”. It is important to be sure that the thickness of the core is within these tolerances.

Elegant Mahogany sliding door

Weight and Strength

Strength plays a key factor when building larger doors. Traditional door building methods may dictate that strong doors are heavy and lightweight doors are weak. Weight is a major issue with oversized doors. Heavy doors are significantly more expensive due to additional structure costs, higher labor costs, and extra shipping and handling costs. Heavy door core does not mean that it will have high strength and the larger the door is, the more strength is necessary to maintain a long lifespan.

When using Sing’s metric interior technology where every two inches is mitigating the potential of the exterior surfaces to move two to three inches at a time. Rigid foam insulation is used inside these small torsion box grids made of vertical grain natural wood fiber which pushes and pulls against the surface material’s tendency to move, keeping it straight when it would otherwise warp. It also provides a huge weight advantage over any other method of trying to keep a door from moving following installation.

What type of skin is best to build a large modular door?

Paint Grade – It is easy to hide the seams. Seams can be almost unnoticeable if modular sections are joined with a Sing Spline. If the spline is made of solid wood, it can move or warp after the moisture levels change and it will be reflected on the surface of the door. This can cause the surface of the door to crack after the seasons change.

HPL (High Pressure Laminate) – See how precise the joint is using only a Sing Spline. HPL is available in a wide variety of patterns. The best choice for HPL is a vertical pattern to help the joint blend into the surface. HPL is a good choice when ordering one of our modular oversized doors. The patterned HPL allows the joint line to be hidden in plain sight. The door can be as big as 12 feet tall and 40 feet wide without having any noticeable seams.

HPL Barn Door Joint
Metal – If it is paint grade metal, the seam can be filled with joint compound and then painted making a seamless joint. Metal doors are traditionally very heavy, but with Sing Core inside your metal door can weight roughly 1/3 of a traditional metal door. You can choose from any type of metal you would like, but our most commonly made metal doors are Aluminum or Cold-Rolled Steel. Click here to see a paint grade Sing metal door.

FRP – FRP, or Fiber-Reinforced Plastic, can be used to make very large doors and very durable doors. FRP can be smooth or have a textured surface. It is much more visually appealing and functions much better than solid wood which has potential to crack, warp, twist, and cup. Besides, solid wood weights a lot more than Sing wood stave planks. Sing wood stave planks are the ideal material to replace solid wood for such jobs as, doors, tabletops, post and beams, and many more. An advantage of choosing wood staves are that they are much more precise than solid wood because their tendency to move over time is minimal in comparison. On the other hand, wood staves are much harder to match with surrounding patterns than a wood veneer skin.

Wood Veneer – Wood veneer has an average thickness of 0.020″-0.030″ and is very difficult to hide joint line in the face of the panel. Wood veneer is often much more challenging because it is usually very thin, normally only 0.020” thick. We always suggest using thicker wood staves which are usually 0.125” thick rather than veneer. However, Sing Core has a proprietary technology to make a veneer panel seamless as large as 10′ by 16′. This requires the veneer to be staggered and hot-pressed. It is very costly to use veneer, oftentimes we use wood staves to build larger doors.

For a tighter budget, we recommend using a paper backed veneer which only requires being cold-pressed. Sing Core provides the smoothest MDF skin for our clients to hot-press. Cross banding is not required with our smooth and high precision substrate, which may be hard to believe for some people. We have been doing this for many years with our innovative technology. We always recommend that our clients purchase our veneer substrate, complete with the same warp-free guarantee, and hire your local veneer contractor or do it yourself to save some money. One advantage to using a wood veneer as the skin for your door panel is that veneer can be easily matched to the surrounding area. One disadvantage to using wood veneer skin is that it is not well suited for exterior purposes, such as entrance door, and it can be difficult to repair if damaged. Veneer skins are the also limited to the maximum door size of 10′ by 16′.




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Interior Sliding Barn Doors

It is not uncommon for interior sliding barn doors to be specified as metal barn doors, such as steel sliding barn doors and aluminum interior barn doors.

Natural wood species top the requests for interior sliding barn doors, by far. While contemporary architectural design fashion shifts dramatically, the most common natural wood grains specified for natural wood architectural doors are:

Top 10 Wood Interior Sliding Barn Doors

1. Pine Barn Door

2. Cedar Barn Door

3. Walnut Barn Door

4. Knotty Pine Barn Door

5. White Oak Barn Door

6. Alder Barn Door

7. Maple Barn Door

8. Hickory Barn Door

9. Mahogany Barn Door

10. Cherry Barn Door

And just in case you were wondering these other natural wood interior sliding barn doors follow the Top 10 in their order of popularity: Red oak, red cedar, teak, birch, ash, white pine, fir, hemlock, beech, and rosewood wood species.

Even though these natural wood species are the most popular, doesn’t mean you are limited by any means. The more high-end the project is, whether it is an exclusive commercial or residential structure, the doors could be specified as very exotic wood.

By using veneer doors as your interior sliding barn doors, you honor and preserve the natural resources by using very thin layers of the natural wood on the surface, which can end up looking like a solid wood door, if you do it right.

Natural wood veneered interior sliding barn doors are a conscious use of natural materials, whereas natural wood veneer may not be recommended for exterior doors. Wood veneer is too thin to be used in an exterior application, as it cannot take much abuse when exposed to the elements. In the case of exterior doors, it is best to stick with wood stave doors, using natural wood planks of at least 1/8” thick.

The Best Interior Sliding Barn Doors

The best interior sliding doors have Sing Core inside. You might ask, “What is Sing Core?” Sing Core is a patented core material invented by inventor, Peter Sing, who is also the president of Sing Core. His experience and fascination with aeronautics led him to create a lightweight high strength building material which could be used in the aerospace industry.

Who knew he would invent the most exclusive sliding barn door substrate material that could be used to build enormous interior sliding barn doors up to 50 ft. that weight a fraction of the weight of other wood-based solid core doors and are stronger than steel pound of pound (independently rated at 660+ PSI).

But Sing’s invention doesn’t stop there, Sing also pre-insulates every one of his door blanks to further enhance its features, such as increased climate control and built-in sound proofing for increased energy savings, safety, and security.

And on top of that, there is the unheard of guarantee that cannot be touched by any other method of building doors, with Sing’s own,

50-year Warp-Free Guarantee

Sing’s invention has enabled the biggest and best door manufacturers in the United States to build these large oversized sliding barn doors that can be guaranteed not to warp, bend, twist, cup, or otherwise fail (including structure and lamination) for 50 years, for flawless customer satisfaction.

Proudly manufactured with locally sourced materials and made in the USA by highly skilled craftspeople and artisans, the art of building customized warp-free substrates which are perfectly matched for any surface material and it’s inherit reaction to changes in the environment and tendency to move.

As Sing’s clients have been saying for more than 20 years, now,

“There’s no other way to do it.”

There is no other way to build a large door of any type or style and guarantee that it will basically never warp, guaranteed.

Mr. Sing says, I could not say it, if it wasn’t true. And If it wasn’t true, if even one door warped, I’d be out of business.”

Sing Core is the only way to build a warp-free interior sliding barn door, period.

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Sliding Interior Doors

Interior sliding doors have come a long way, and now you have so many choices available in the most modern sliding door ideas that anyone could have the most stunning side-sliding entry point. From the sliding barn door to the sliding pocket doors, these space-saving sliding interior doors are among the best sliding doors in the world.

The best exterior and interior sliding doors made in the United States of America all have patented Sing Core inside and are guaranteed to remain warp-free for 50 years, including a full structure warranty, and this is not to be found in any other interior sliding doors.

Sliding interior doors may not sound like a complicated job when it comes to including architectural details or incorporating large sliding doors in your designs, but if you’ve had your feet in the clay for some time, you should be aware of the problems which may be presented by internal sliding doors, especially if they are large in size.

First off, the most desirable material for sliding interior doors is any number of natural wood species. Wood sliding interior doors can be a challenge, if not at the outset, then definitely over time. Why? Because wood moves. It may no longer be a part of a tree, but it still responds to changes in the environment, which causes your sliding interior doors to warp.

Thanks to inventor Peter Sing and his inventions at Sing Core, door manufacturers (some of the largest and most prestigious door companies in the world) can create warp-free indoor sliding doors that can be guaranteed to remain straight and true for 50 years.

How to Make Warp-free Sliding Interior Doors

Sing’s patented and patent-pending warp-free wooden door technologies are based on a basic well-known wood crafting technique called torsion box, which is a respected technique for building things out of wood that will resist warping as well as reducing the overall weight of large wooden items such as conference tables and internal wooden sliding doors.

Though Sing’s invention does stop there, his warp-free-door technology goes so much further beyond standard wood working techniques. For instance, he started out by reorienting the direction of the torsion box frame from horizontal to vertical. That, in itself, was a huge improvement for warp resistance and increasing shear strength. But he didn’t stop there, either.

Next, he filled all the individual rectangles (hollow spaces left open in traditional torsion box designs) with rigid foam and secured these metric components between two stress skins using formaldehyde-free glue in the most Eco-friendly manner for the most sustainable substrate known for use in sliding interior doors.

Sing unveiled his truly modern barn door, and the biggest and best door companies, were all over it. Prior to Sing’s invention, the big door companies had all but eliminated the production of oversized doors of any kind due to their propensity to warp, making them impossible to warranty, and repeated service calls made them impractical to offer. If they did take on one or two large sliding interior doors, they would add a rider to the contract indemnifying them from any responsibility due to warp.

Keep in mind that even though the best sliding interior doors have Sing’s core inside, his company does not actually build doors, even though Sing is well known for making some of the most perfect doors, he only supplies the raw product, the door blanks or sliding door core, to the door companies, millworks, and high end custom door manufacturers, who actually create the masterpieces on his canvases for which he is so well known.

They are in the process of expanding their large custom sliding interior door divisions because they can confidently deliver a high precision, high-end solution which includes Sing’s 50 year structure and non-warping guarantees.

So, now you can get large sliding interior doors that are lightweight, insulated, stronger than steel, and made in the USA that are guaranteed not to warp for 50 years. All you must do is to contact your local door provider, and tell them you want, “Sing Core inside.”


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Custom Sliding Garage Doors

SingCore specializes in producing the highest quality sliding garage doors on the market. Our patented and patent pending core material is ultra-light weight yet super strong. Choose any style of door, skin material, or hardware arrangement that you desire. We building custom door panels to match your specs exactly.

How to Build Sliding Garage Doors

Our sliding garage door blanks come “unfinished” but made to your exact specifications in terms of size, hardware blocking, and surface material. SingCore surfaces include the possibility of —

  • Wood stave – white oak, walnut, cedar, teak, cherry, and more
  • Wood Veneer – white oak, walnut, cedar, teak, cherry, and more
  • Metal – aluminum, hot rolled steel, cold rolled steel, and more
  • Paint grade
  • High tech laminate or fiberglass skins

Bypass Sliding Garage Doors

Bypass doors are just one of the many specialty sliding garage door types available for production by SingCore’s crack team of door manufacturing experts. Bypass sliding door, sliding door with man door, accordion doors, and so much more is possible with our state of the art door production technology.

There is no door too small or too large for SingCore’s aerospace inspired “honeycomb” wood and foam core construction. We guarantee your panel will be perfectly straight (to AWI standards) for 50 years or more! This makes SingCore the perfect companion for your high insulation value sliding doors, where exact straightness is the key to a great seal for a sliding door.

Side Sliding Garage Door Cost

Our custom production line is capable of making custom doors in any quantity. Whether you need a one off door for a remodel project or custom high end home, or you need 1000 doors for your development, SingCore can be you supplier.

Because we make every door to order, the cost varies quite a bit based on quantity. The best way to get an idea of price is to submit a quote request with your project details.

Our estimating team, with decades of experience in custom sliding door design and manufacture, is standing by to answer your questions and to help you design and custom door that meets your needs and fits in to your budget.

DIY Side Sliding Garage Door

For the DIY or home gamer, SingCore may just be the perfect fit. We are not a finished door provider, and we do not provide pre-hung or similar products. Our bread and butter is the production of unfinished door “blanks” designed and built to your specifications.

Because of this, we only sell to individuals with the skills and equipment to properly finish and hang our doors. If you are a homeowner without construction skills, we recommend that you contact a millwork or finish carpenter in your area, and tell them you want “SingCore inside”!

Manual Sliding Garage Door

Because SingCore is exceptionally light, less than 1/3rd similar solid wood doors, they make great manual sliding garage doors. Easy to operate, highly insulated, and perfectly straight for your lifetime, SingCore siding doors are practically unparalleled on the custom garage door market.

Get A Price Quote Today

The fastest way to get feedback on your project and your questions answered by a qualified sales person is to submit a price quote request. How can we help you today?

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Large Barn Doors

Eco-friendly large barn doors are taking on a whole new look and are a more sustainable solution for indoor and outdoor applications while commanding a unique stylistic approach to contemporary architectural design. The best extra large barn doors are emerging as featured presentations in all types of structures from residential and commercial to hospitality and industrial venues.

This new approach to the modern barn door is creating a stir as simple design of the traditional wood sliding barn door is now able to incorporate exciting characteristics that far surpass the simplicity of your grandfather’s farmhouse sliding door by incorporating this new generation of large architectural barn doors.

So, what makes this superior modern barn door so different from the sliding farm door of yesteryear?

While they may look similar, the large barn door hardware is much more sophisticated, but the biggest secret of all is what is found deep inside the best large barn doors of all time. If you were to look inside, you would find a patented substrate specifically designed to build the ultimate large barn doors.

Inventor Peter Sing is responsible for discovering and manufacturing this unique hybrid composite door core found inside the best modern barn doors today. Sing’s core imbues each barn door with astounding characteristics which cannot all be found in any other type of barn door, anywhere on Earth.

For instance, if your modern barn door has Sing Core inside, you will possess a door which is

  1. Eco-friendly
  2. Lightweight
  3. High strength
  4. Solid as a rock
  5. Fully insulated
  6. Warp-free
  7. Guaranteed 50 Years

Large Barn Door Problems

If you were going to make a high-end large barn door for a demanding client or visionary contemporary architect, you would have to hire a door engineer with the ability to design sliding barn doors which could be built to architectural specifications. The goal is to have an end product, a large barn door, which will not warp, fail, or require regular ongoing maintenance to keep it operational over time.

If the large barn door was quite oversized, say anything over three-and-a-half ft. wide and 7 ft. tall, you would find some extreme goings on inside such a door. There would likely be some type of welded steel interior framing and other heavy inserted in an effort to keep such a big barn door from warping, a pretty toxic approach to trying to solve the problems associated with large barn doors.

This is the biggest complaint with failing large barn doors: They warp. And warping barn door, if they are warped enough, will cease to operate, and if they are very heavy, this causes extra stress and strain on both hardware and the structure itself.


Large Barn Door Solutions

Thanks to Sing and his patented inventions and patent-pending solutions there is a way to make a lightweight high strength modern pivot door which can be guaranteed not to warp or fail for 50 years. There is no other way to accomplish such a feat without Sing Core inside.

Eco-friendly Large Barn Doors

Sing’s manufacturing facility is nestled in the pristine Pacific Northwest, where ecological approaches to building and creating almost anything is of profound importance to its inhabitants. So, Sing’s factory uses the best of both worlds, basic traditional woodworking craftsmanship and advanced cold-press technologies which use very little energy consumption. Sing also uses formaldehyde-free adhesive and responsible use of natural and recycled materials, plus being so lightweight makes them easier to ship around the world using less fuel than other barn door manufacturing methods, assuring Sing’s products have an extremely minimal carbon footprint.

114 x 134 x 2 MDF Large Sliding Barn Door

Lightweight Large Barn Doors

Sing’s patented and patent pending technologies empower his True Flat Team to create these amazing hybrid solid composite cores which weigh a fraction of other solid wood-based structure cores. Lighter weight barn doors mean lighter weight hardware and less stress and strain on the structure. This prevents the need for constant ongoing maintenance to the barn door, a huge savings over time.

High Strength Large Barn Doors

You might not need bulletproof barn doors, but you will enjoy having lightweight large barn doors that are stronger than steel pound for pound. Sing’s large barn door core material is independently rated at 660+ PSI and is featured inside some of the highest security doors and impact doors in the world.

You can see that Sing’s panels are so strong that the inventor can stand in the middle of this one-inch-thick 13 ft. panel with little or not deflection. That is an effective strength demonstration.

Solid as a Rock Large Barn Doors

Sing’s patented and patent pending door core technology is based on his solid hybrid composite invention which is basically a vertical grain torsion box panel where the grid which would normally be left empty is filled wall to wall with recycled rigid foam insulation. Once assembled and cured they can take a beating, and unlike other doors can easily be repaired to full structure strength if breached, which is more sustainable than replacing the whole door.

Sing says, “Kick any standard stile and rail and it will break. Kick my door an you will break your leg!”

Fully Insulated Large Barn Doors

Inherit in Sing’s large barn door core invention is full insulation throughout which offers huge advantages to not only end users, but the sound proof door and refrigeration door manufacturers who rely on Sing to provide them with the insulated substrate to make the best rated lightweight large barn doors fully formatted for sound deadening and climate control.

Warp-free Large Barn Doors

And Mr. Sing is the King of the Warp-free large barn door. All hanging barn doors move according to changes in the environmental elements which surround them, and to make matters even worse, this is more problematic when in use as an exterior door, where one side is facing a structure’s interior, while the other could be exposed one hundred present to the weather.

Sing proudly guarantees his large barn door cores not to warp, bend, twist, or cup for a very long time, in fact, 50 times more than any other door manufacturer.

Large Barn Doors Guaranteed 50 Years

Unprecedented in the industry Peter Sing fully guarantees his large barn door core not to warp, bend, twist, or otherwise fail for 50 years, including structure & lamination. Nobody has ever dared to go there, and Sing who supplies the biggest and best door companies in the world with warp-free door core for all their oversized doors says, “If I couldn’t do it, you would have heard about it by now.”

And they all say the same thing,

“It’s the only way to do it.”

For if there were any other way to make a lightweight warp-free door, you know these companies would do it themselves, but they rely on Peter Sing’s patented innovations to provide what would otherwise be impossible, so they can better serve their clientele.

Should all your doors have Sing Core inside?


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Architectural Sliding Doors for 2020

In the new decade, large over-size sliding doors are landing large amount architects and design professionals all over the United States. Whether a man door type for convertible office spaces or a movable wall design for that open concept in to private meeting space ascetic, large sliding doors are set to be the hallmark of the coming decade of design. Architects, millworks, interior designers, and high end contractors all best be aware of this coming trend.

What are the best sliding doors?

SingCore makes the best sliding doors. SingCore doors are exceptionally strong, straight, and lightweight, which makes them ideal candidates for architectural projects in 2020 that push the boundaries of creative design. Tight tolerance pocket doors, 30′ or greater sliding walls, all in exotic or unusual materials can all be realized in a cost effective manner with SingCore’s core inside.

Our patented and patent pending core material is guaranteed to maintain perfect flatness over its lifetime, and comes with an unparalleled 50 year guarantee. This means when you install SingCore in your large sliding door project, you have the certainty of mind that your client will come to enjoy the use of their SingCore door for many decades. And that 2070 will arrive with your SingCore panel in fine structural shape.

New Trends in Large Sliding Door Design

In this decade of 2020, new trends are emerging in architectural design of large sliding doors.

Man Door Sliding Door Trends

Increasingly, the use of man doors, smaller 3’0 x 7’0 or similar doors built within a massive sliding door are becoming increasingly prevalent in large interior sliding doors. Man doors allows for one opening to be used for three different uses:

  1. Entrance and exit of personnel while in a privacy configuration
  2. Reconfiguration of the space for an open concept or large space for special use cases / events
  3. Movement of larger equipment or groups of people between spaces

Moveable Wall

The use of movable walls is also finding increasing use in office space design where the tenants desire the capability of an open combined use space that can be reconfigured in to smaller meeting spaces when the need arrises.

SingCore is particularly adept in large movable wall uses because our material is extremely light for it’s size, making it easy to install, easy to operate, and cheaper to install based on hardware costs. Our patented core material also boosts insulating foam material which provide excellent noise suppression and well as thermal properties.

Curved Door

In the effort to move beyond the ordinary, oversized curved doors are starting to find place in the bespoke construction industry. Curved doors offer a distinctive look that can better utilize space in many situations.

SingCore offers curved doors built to your specifications. They can be built to any size and any profile, without compromising strength or rigidity. While we can’t promise that your curved door will be “true flat,” we can promise that they will have just the right curvature for you needs, and stay that way for the duration.

Contact SingCore Today

The best way to get SingCore involved in your next project is to submit a price quote request with your specifications.