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Master Quality Door Veneer Surfaces

Our Master Quality Doors are Complimented by Our Ultra High Quality Skin and Surface Choices

Wood Veneers

Veneer allows us to create a high end finish with less weight and cost while offering a wide assortment of beautiful door surfaces.  There are a number of different types of veneers that all provide excellent options that will compliment the styles of your structures.   Difference species generally demand a different price.  Some popular examples are Maple, White Oak, Mahogany, Cherry, Alder, and Hemlock.  Veneers are sold in bundles and range in price, but generally use the most flawless wood to provide the absolute most appealing visual aspects for your doors.  Standard veneer thickness is .020″, and is often used to decorate high end furniture, cabinetry, cabinetry, floors, and even plywood. You can trust Sing Core to veneer your doors, alternatively you can get substrate only and have your veneer applied locally.*

The beauty of veneer is the high quality wood grain appearance that provides you with the most natural aesthetics.  Each piece is completely unique, because it is cut from the actual logs.  Not only does this allow you an amazing modern appearance, but also you can achieve a more vintage, timeless, or antique look.  Normally, better quality veneers are used for doors, because customers want the best looking doors they can possibly get.  Door grade veneer comes in a few distinct grades.

Huge Pivot Door Mahogany Wood Veneer

Gorgeous Massive Mahogany Wood Veneer Door

Face Cut Options

Rotary Cut Veneer – Created by spinning the log and peeling off sheets, almost like unrolling a roll of toilet paper, rotary cut veneer is the most common type of veneer.  The advantage of this type of veneer is that it results in one continuous sheet.  It is a very cost effective way of producing veneer, but it results in a very unpredictable grain pattern.

Plain Sliced or Flat Cut Veneer – This is the second most common cut.  In this method, thin layers are sliced one at a time along the width of the log.  The slices, which are also called leaves, because the blade works its way from the top of the log to the bottom, there is a gradual transition in the grain pattern.  This method of cutting parallel to the growth rings results in a V-shaped pattern that is often seen on sheets of plywood.


Rift Cut Veneer – Another interesting method is the rift cut process, which allows for a more straight-grained look.  In this method the log is quartered, then cut perpendicular to the grain in repeating arches.  The advantage to this is that you get a relatively uniform grain appearance.  The disadvantage to rift sawn veneer is that it costs more, because the process is more time consuming.

Quarter Sliced Veneer – This type of veneer is also sometimes called quarter cut or quarter sawn veneer.  This cut is often specified when the customer wants an exceptionally straight grain appearance.  First, the log is quartered, which allows each quarter to be sliced perpendicular to the growth rings.  Since leaves are cut more narrowly than plain sliced, they are much more easily lined up with other leaves, allowing for superior uniformity.  Despite it’s vast advantages, this method requires a larger log diameter compared to the alternative methods.  This method also achieves a sort of flaking appearance, created when the veneer knife bisects medullary rays in the tree.

Beautiful Maple Veneer Skin

Beautiful Maple Veneer Skin


Veneer Matching Options



No matter what cut of veneer is applied, without proper veneer matching, your project will not turn out as expected.  Veneer matching is a true art form.  The job of matching veneer is a precise job that requires a detailed approach.  The appearance is partially determined by how the veneer slices are lined up on the doors.

Book Match Veneer – Every other veneer leaf is turned over, like the pages of a book.  With this method, the veneer will be mirrored between each consecutive two leaf section, resulting in a repeating series of symmetrical patterns.  This method is preferred by many, because of the continuity of grain.  This method produces both ascending and descending prominent characteristics of the grain.  Not all cuts of veneer can be used with the Book Matching method, however, but plain, quarter, or rift sliced veneers can all be used for this purpose.  This book end formation tends to reflect light and accept stains differently.  With this method there is also potential for wide color variation, known as “barber pole” in some species or flitches.  Despite these variations, they are still considered desirable.

Random Match Veneer – This method produces a more chaotic appearance, because pieces are generally unmatched, as if the applicator has taken a series of boards and lined them up on the surface of the door.  This produces a more old fashioned look, as something that was perhaps built before modern methods of veneer were invented.  With this method, there is often a deliberate method to reduce grain consistency.

Continuous Match Veneer – This is when the pieces of veneer are used for both the door and the transom, allowing for a very consistent look between the door and the transom.

End Match Veneer – This is generally selected for doors with transoms.  This match uses a single piece of veneer that runs from the bottom to the top of the door.   Veneer can be turned turned at the joint to achieve this appearance.

Slip Match Veneer – This is one of the quickest methods of matching veneer, but requires higher quality veneer that is fairly uniform in appearance.  Sheets are slipped out on the the surface one after the other, creating a wave of repeating patterns.  Some frown on this method, because of the abrupt joints.  This differs from book match veneer in that book match is better at hiding the joints.  Uniformity of color is superior in this method, because each piece has a similar level of light refraction.  It also allows for a relatively straight grain pattern.

Natural Variations

Because wood is an organic product, each piece has its own characteristics.  There is a vast array of grain patterns and formations, which can vary among trees and different flitches.  Because of that, some trees may not meet standards.  Other trees may considered of exceptional quality.  Prices may also vary depending on the quality and appearance of the veneer.  Because of variations in natural grain of each tree and differences in cuts, you can experience amazingly unique grain, pattern, and color, for each leaf of veneer, which translates into an an unlimited variations in door appearances.

In all cases, the natural wood quality will improve and compliment design elements, especially if the wood is applied in its natural state, unfettered by paints and enamels which might hinder the actual beauty of the wood.

Some species, like maple and birch can show a wide variety of color ranges.  When it comes to maple and birch unlimited amounts of sapwood and heartwood, large portions may be unusable, because of unacceptable color.  Sapwood lighter in color, while heartwood is darker in color.  There is also the issue with light, dark, and color streaks, spots, and color variation that results from mixing sapwood with heartwood.  If these sorts of variants in color and grain are not desired by you or your customers, veneer must be selected accordingly.  If lighter shades of veneer are desired, you must specify sapwood maple or birch.  If darker shades are required, you should select heartwood, however, this type is often limited in supply.

 * = Professional veneering can be very tricky. If you are getting substrate from Sing Core and having your millwork (or someone else) apply the veneer, be certain to affirm that they have the expertise to apply the veneer appropriately. We use the highest level of professional veneer professional and techniques. We can guarantee our veneering, if you have veneering done off-site, it is their responsibility to do it correctly. A faulty veneer could jeopardize your Sing warranty.


Door Graphics and Murals

Very Large Sliding Door With and Without Mural

Our doors make an exceptional surface for applying murals, canvases, or printed wraps and images.  This is an excellent way to make an otherwise standard looking door, beautiful and vibrant.

In recent years, graphics, scenes, or photos applied to the surfaces of doors that turn your openings into true works of art.  This style of door is only limited by your imagination!  Some examples are as follows:

  • Fine Art: Amazing portraits, scenery and landscapes, animals, objects like cars and still life images
  • Designs: Patterns, colors, shapes, and other abstract art
  • Wood Grains: Any sort of wood species, style, or colors
  • Plants: Beautiful flowers, leaves, barks, and other plant based imagery
  • Textures: Pebbled, rusted, grainy, smooth, baked earth and other textures
  • Other: Anything you can imagine can be printed Sing Core doors as long as you have high quality electronic images and graphic files.

We start with a smooth tempered board or Medium Density Overlay (MDO) for a best quality finish, or select a wood veneer or paint grade option for your highest quality finishes.  This is only limited by your imagination!



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Large Sliding Bottom Rolling Doors

You will find Sing’s super large, oversized bottom rolling large sliding doors in use over a wide variety of industries such as aviation, commercial, agricultural, and industrial applications.

If you are looking for a lightweight oversized large sliding door that is stronger than steel pound for pound your solution to the size vs. weight ratio has finally arrived.

Due to inventor, Peter Sing’s patented and patent-pending large door technologies, door designers, and engineers of architectural doors have been empowered to take their conceptual contemporary ideas to the next level.

Now, even the largest of sliding doors can become manageable as complete solid units or as modular systems ready for assembly on site, with less need for heavy equipment with reduced threat of on the job injuries which is an ever-present risk when dealing with traditional large sliding bottom rolling doors, but not if your design has Sing Core inside.

These revolutionary lightweight and high-strength materials are having a huge impact on contemporary architecture and design especially in groundbreaking projects involving the largest rolling modern sliding doors in their respective industries.

Government and military applications now have a lightweight high-strength substructure made of Sing Core which can handle the added weight of any heavy weight additional material which may be soundproof and/or blast-proof, reducing the overall weight to one-third or less without compromising safety, security, or high performance.

And no other Eco-friendly, lightweight, dimensionally stable, and insulated building material is more high-precision (+/- .006 in.), stronger than steel (660+ PSI), or sustainable, which comes with a full 50-year warp-free and structure guarantee. 50 years!

When used as substrate material, the added insulation, which is also an integral component of Sing Core’s structural strength, helps add sound deadening characteristics while increasing climate control capabilities of any end product encapsulating it, saving lives and energy.

From beneath the sea (US Navy) to outer space (NASA) and throughout industries everywhere in between, Sing Core is changing the manufacturing methods when approaching the latest developments in the design and deployment of the largest sliding bottom rolling doors.

Whether inside the aerospace flying structures of the top aviation companies or the structures which house them while they are on the ground, lightweight high-strength Sing Core is making huge improvements in performance and reduced maintenance costs over time, when compared to traditional manufacturing methods inside and surrounding large aircraft designs.

While Peter Sing’s patented core material could be used in nearly any phase of construction, and has been used to build entire structures, from foundation to roof, everywhere in between, including most all interior furnishings, it’s premiere use with the highest degree of noticeable increased performance, is when it is featured inside any large rolling slider door system.

Steel buildings are made of it, without the need of a structure frame, which is having a noticeable impact for designers of modern metal building systems and the contemporary architects who are specifying Sing Core in their designs.

Large rolling doors with Sing Core inside can be used in any specific configuration, such as bi parting sliding doors, single-stack sliders, sliding doors floating, or fully suspended doors of large or enormous size.

Keep in mind that Sing’s large sliding bottom rolling door solution is not an out-of-the-box one-stop solution as Sing only provides the base door material which can be covered in nearly any flat building material in his factory located in the Pacific Northwest in Washington State.

Routinely, Sing’s base material is sent to metal fabricators, machine shops, millworks, or custom door manufacturers who supply the finishing details, prep for hardware, and arrange for installation of the behemoth sliding doors.

Not only are Sing’s base door manufactured in the United States but all the material inside these extraordinary one-of-a-kind door blanks are local sourced and each one is like an individually unique work of art fully made in the USA.

If you’re in the planning stages of your next project which may potentially feature large sliding bottom rolling doors, shouldn’t you check with your architect or door designer to see if you should have Sing Core inside your door?

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Sliding Door

Nestled into the woods of the Pacific Northwest, inventor Peter Sing’s patented Sing Core is making an impact in the sliding door industry, growing and expanding day by day. In the sliding door industry which is dominated by the top 10 door companies in the world, the biggest door companies, like Anderson Windows & Doors, Jeld-Wen, Pella, as well as the most prestigious millworks, all come to Sing Core when they face a challenging sliding door problem.

The large oversized sliding door seems to present the largest number of problems associated with the sliding door.

First of all, there is the size of the sliding door which can be a challenge for anyone to transport and handle, then there is the weight which will require heavy equipment and experienced professionals to operate the equipment for maneuvering the sliding doors as well as installation.

Beyond the size, the weight of the sliding door is vastly important because a heavier door will require heavy duty hardware to operate the door effectively. Also, a sliding door which is heavy in weight will add stress and strain both on the hardware and the structure causing costly repairs later along the service life of the sliding door.

Exterior sliding doors may be the most problematic due to their tendency to fail and become inoperable. These doors generally will fail for warping, bending, twisting, cupping, or any other variety of maladies including delaminating.

What do you do when you sliding door fails?

You might do what more and more Americans are doing every day; purchasing a replacement door from any of the top door makers, millworks, or custom sliding door manufacturers and tell them you want a replacement sliding door that has, “Sing Core inside.”

Peter Sing and his company will work hand-in-hand with your favorite sliding door company, millwork, or custom sliding door manufacturer to provide you with the perfect replacement sliding door with Sing Core inside.

Why do you want a sliding door with Sing Core inside?

You want a sliding door with Sing Core inside because you want a sustainable door that will not fail over time, thanks to Sing’s patented and patent-pending sliding door inventions.

Doors with Sing Core inside are 1) Eco-friendly, 2) Lightweight, 3) High strength, 4) Fully insulated, 5) Warp-free, 6) 50-year guarantee.

1. Eco-friendly Sliding Door

In this day and age, it’s not enough to have the best sliding door, you want an Eco-friendly sliding door which is made in the most ecologically sound and respectful manner maximizing the best of natural resources and recycled materials for a fully sustainable sliding door product.

Plus, you’re saving resources, finances over time, and reducing your sliding door’s carbon footprint by being,

2. Lightweight Sliding Door

No more need to settle for heavy sliding doors which are more expensive to ship, handle, and maintain over time. Your lightweight sliding door weighs in at one-third (or less) the weight of your normal door which means less expense (and risk) for maneuvering and installing your sliding door as well as less wear and tear on both the hardware and the structure which hosts your lightweight sliding door.

3. High Strength Sliding Door

Now you can have the strongest Eco-friendly, lightweight door in the world, bar none. Sing’s reinforced torsion box technology allows sliding door makers to create sliding doors, even if incredibly oversized and very large, like aircraft hangar doors, which are massively strong, UW tested at more than 660 PSI, which is stronger than steel pound-for-pound.

In fact, in terms of enjoying increased safety and security, sliding doors with Sing Core inside are so strong, inventor Peter Sing says, “If you kick my door, you break your leg before you break my door.”

4. Fully Insulated Sliding Door

And if that weren’t enough reason to desire Sing Core inside your sliding door, imagine having all this and a fully insulated door for extra sound deadening and climate control characteristics?

When you want to keep warm inside when it’s cold outside or visa versa, a sliding door with Sing Core inside will keep you warmer or cooler when experiencing the most severe weather conditions.

5. Warp-free Sliding Door

One problem with sliding doors is that they are prone to warp over time. This problem is exasperated if you have a bypass sliding door or a sliding pocket door do to being articulated alongside other sliding door materials. The less the clearance the bigger the problems associated with potential sliding door warp.

Only doors with Sing Core inside can be made to remain warp-free over time, protecting you and yours with an unprecedented 50-year warp-free guarantee.

6. 50 Year Sliding Door Guarantee

Your sliding door is only good as the guarantee which backs you and your door company.

If you have a sliding door with Sing Core inside, you have a door which can be guaranteed not to warp- bend, twist, or otherwise fail, including a full structure warranty for 50 years.

Want more from your sliding door? Price Sing Core Here


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Horizontal Sliding Wall Systems

Horizontal Sliding Walls (HSW) are by far the best way to divide any two adjoining spaces. In a minute you can have one or more well defined spaces and in the next, one-large open expansive space. Well-known among the architectural, engineering, and design industries HSWs can pose problems, especially for the larger horizontal sliding wall systems.

The premiere solution for dealing with any large spanning opening, sliding wall panels are the primary ingredient in effective horizontal and folding sliding wall systems.

In high end HSW Horizontal Sliding Wall Systems and FSW Folding Sliding Wall Systems, the most discerning clientele seeks more than just another way to either block a gaping hole or divide a large space into one or more sensibly usable areas.

This new generation of high-end user wants more than just a visual blockade. They want lightweight, multi-panel systems can span across a vast expanse while delivering added safety and security without having to worry about warping sliders.

Besides containment, they also desire climate control and sound deadening qualities which may not be offered by an off-the-rack horizontal sliding wall system.

Horizontal sliding walls can offer the end user many options and benefits when selecting sliding walls and sliding doors as components in the overall system. A custom horizontal sliding wall is an innovative development in approaching a multi-panel door system that can top hung from the ceiling or frame and/or can slide atop a single channel track which can be recessed into the floor.

Other options include movable wall systems with stacking wall panels in folding sliding systems, and can be architecturally specified in pocket door, sliding wall, and sliding bypass formats, resulting in horizontal sliding wall solutions that make your life easier than before.

Clients want a sliding door or wall system that is both offers convenience and automation in their movable wall systems. Due to the expansive options offered by using a horizontal sliding wall substrate, like Sing Core, sliding wall systems can be horizontal and folding sliding wall systems using this new generation of sliding wall panels.

Basically, a well-designed hand-crafted horizontal sliding wall and sliding door system can feature nearly a limitless number of configurations, and with the aid of Sing Core, your horizontal sliding walls can be of huge and enormous size (up to 50 ft tall or wide) without having to be concerned about difficulty of transport, installation, or failure over time.

Of the most demanding clientele including scientific, industrial, and military applications, soundproof wall systems, blast resistant horizontal sliding walls, or used as a horizontal sliding fire door system.

The spectrum of jobs where you find a Sing Core horizontal sliding wall (HSW) system range from sliding walls residential to United States military and space programs, like NASA, and everywhere in-between in high-end commercial or industrial sliding wall applications.

Your design can be brought to life using Sing’s Horizontal Sliding Units which are are custom-built to meet or exceed your end-user’s custom expectations.

Patented Sing Core is featured inside all Sing Horizontal Sliding Wall Systems which comprise multiple panel door systems that are lightweight, stronger than steel pound for pound and can be guaranteed not to warp for 50 years.

You can expect the highest customer satisfaction from your Sing reinforced HSWs in full floor to ceiling sliding panels. Depending on the operation and conditions of your ultimate project, the sliding doors can be custom-designed to be stored in shallow recessed pockets in walls to be fully concealed within a host cavity when open or not in use.

Sing also offers modular walls systems which can be assembled and disassembled on the fly at a fraction of the time necessary to build traditional drywall barricades.

Horizontal sliding wall systems are light enough to be operated by hand even if very large HSWs or can be automatically operable walls of individual panels which slide easily with the push of a button.

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Sliding Door Improvements in Mfg. Technology

Since you were last quoted we have made many improvements in production. These improvements have allowed us to customize our panels to work precisely within your target budget.

Recently, we have added our substrate only sliding door panels to our line of products, which could reduce your costs significantly. Customers love this option, because it allows them to apply their own skins, even glass or murals, veneer, wood staves, varnish, or primer and paint for a beautiful finish.

We also provide additional skin options and veneer application, for an additional price. Our process of applying veneer is so advanced, there is no seam. It looks as good as like solid wood!

[Click here to see how we do it!]

Any company can make a door, but very few door manufacturers in the world can produce large sliding doors as strong, lightweight, and straight as ours. All our sliding doors are built to exceed AWI standards. They are made in the USA, sourced with materials from America. No other door manufacturer can offer you a 50 Year Warp-free Guarantee.

Our True Flat Team is standing by to help you with any issue you might have with your doors. Please give us a call to find out how we can help you with your doors from start to finish!

Doors Made to Match Your Budget

Meeting your budget is all about picking the right features and options to bring your project in line with your allocated finances. Give us a call with any budget concerns. We help you come up with a solution to make sure the project comes in within your budget. Give our True Flat Team a try. You have nothing to lose!

Virtually Any Sliding Door Size

We have developed the technology to produce doors upwards of 50 feet wide that exceed AWI standards. They are exceptionally straight, resistant to warping, and completely dimensionally stable. They even come with our signature 50 Year Warp-free Guarantee.

-More dimensionally stable
-More precise
-Available in more sizes
-Have more available features
-100% warp-free
-Resistant to cracking, breaking
-Available with more skin options

We can apply any skin, including hot rolled and cold rolled steel, aluminum, anodized aluminum, mahogany, oak, walnut, white oak, alder, pine, fir, hemlock, copper, bronze, brass, formica, fiberglass. SingCore is here to help you apply exactly the right skin for your job.

The SingCore Process

Ordering from SingCore is simple. Just click the orange “Pricing” button in the upper right hand corner of the page. Fill in your information. Click submit. You’re done. Simple as that! Someone will get back to you with a price quote within 48 hours.

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Interior Sliding Doors

It is clear that not all interior sliding doors are the same. You never know when you might be seeking out Sing Core for your interior sliding doors. While they are primarily featured in large exterior sliding doors due to their lightweight and high strength as well as their ability to be guaranteed not to warp, bend, twist or otherwise fail for 50 years. It’s a tall order, but there’s only one way to accomplish such a feat with an exterior sliding door and it requires having Sing Core inside.

The Only 50 Year Warp-free Guarantee and full structure warranty

When architects and designers are working on very high end homes (i.e., multimillion dollar estates), their clients want only the best, so they seek out characteristics which can only be attributed to Sing Core. Besides giving the best door companies, millworks and custom door manufacturers the ability to make big interior sliding doors (tall, wide and thick) that are lightweight and high strength, they also feature insulation for sound deadening capabilities and climate control.

Interior sliding doors with Sing Core inside can feature any available flat building material on the surface of the interior sliding doors such as any species of natural wood stave, aluminum, cement, concrete, fiberglass, FRP, glass, HPL, Kevlar, LVL, metal (brass, copper, etc.), and steel (including cold rolled steel, diamond plate steel, galvanized steel, hot rolled steel, and stainless steel), just to name a few. So, the possibilities are vast, indeed.

Not just exclusive to the very wealthy, sometimes homeowners just want to have the best (you know who you are), and they have their architects, designers and door companies seek out Sing Core for their interior sliding doors also. Just know that we do not make or sell the interior sliding doors for which we are credited with. We only supply the raw material to the door companies, millworks and custom door makers who make us and doors with Sing Core inside look so good. While we do not deal with the end users, you can have your trade professional(s) deal with us directly.

Some of the best uses of interior sliding doors with Sing Core inside include,

Closet Doors

Closet doors are probably the number one interior use of interior sliding doors with Sing Core inside, especially in very large homes with large closets. In some of these huge homes and estates, the closets can be as big as a normal-sized living room, or an entire small house. These wardrobes can go far beyond what you might think of as a walk in closet, requiring large sliding wardrobe doors.

Often high end closets are climate controlled, all but requiring sliding closet doors with Sing Core inside to complete the safety and security of the temperature and humidity maintenance without wasting unnecessary energy, which also support the Eco-friendly attributes of the most modern closet doors featuring Sing Core.

Of the many types and styles of closet doors being shipped from Sing Core include bifold closet doors (as well as other folding closet doors), closet barn doors, French closet doors, wood sliding closet doors and our classic unbreakable sliding mirror closet doors. And remember, they can be made of anything from beautiful, exotic natural woods to any metal, including silver plate or gold plate interior sliding doors.

Unbreakable Mirror Closet Doors

Ever since the introduction of the Sing Unbreakable Mirror, high end fashion custom door manufacturers have been sourcing Sing Core for their sliding mirror closet doors due to their impervious nature and the ability to create a high end mirrored sliding closet door that is not extremely heavy and potentially very dangerous, both to the weight of the door, and the fragility of the glass mirror surfaces of the sliding mirror closet doors.

Whether you’re a famous actor or rock star, if you want the best mirrored sliding closet doors, that offer both safety and security during the operation of the door (that can come with a 50-year guarantee), then you know you want all your sliding mirror wardrobe doors to have Sing Core inside. Hands down the only way to effectively create lightweight unbreakable mirror closet sliding doors.

Image on the left is a modular large 8×10 door shipped in a pair of 4×10 components cam locked together on site for near seamless paint-ready perfection. Image on right is close-up of near-seamless connection (+/- .006 in.).

Bifold Doors

Interior Bifold doors with Sing Core inside have the distinction of being the most exquisite high performance articulating bifold doors due to Sing Core’s ultra high precision (+/- .006 in.) tolerances. Again for those special jobs requiring large bi fold doors you are likely to encounter problems associated with warping bifold doors which may compromise the operation of these specialty interior doors altogether. With more moving parts, the importance of having non-warping bifold doors is of primary importance.

Internal bifold doors aren’t much good if the operation of the bi fold internal doors’ systems are failing due to warp, bend or twisting interior bifold doors. The same goes with folding closet doors of all kinds which operate with more than the normal number of hinges which might be used in standard hinged doors. Internal folding doors benefit widely when using Sing Core inside folding internal doors.

Sometimes the hardware used for interior bifold doors includes a combination of folding sliding and pivoting hardware in this type of folding interior doors.

Sliding Barn Doors

Interior sliding barn doors are gaining more momentum in the interior sliding door market every day. Contemporary architects are specifying Sing Core inside their large exterior doors, though there is a growing trend of specifying the patented Sing Core as substrate for sliding barn doors, too.

Why specify Sing Core for your interior sliding doors? Mostly because sliding barn doors are more costly than their hinged door counterpart, and the hardware is more expensive. The weight of the interior sliding barn doors determine the type of hinges which are necessary. This task is far easier than one might expect.

Simply weigh the Sing door blank and use the appropriate interior sliding barn door hardware. All hardware for sliding barn doors is determined by the weight of the door. Even though Sing sliding barn doors are more lightweight than other interior barn doors, qualifying them for using lighter weight-rated hardware for sliding barn doors, owners, project managers, designers and architect may elect to select higher-than-current-weight-rated hardware. Why?

Because, since the doors accommodate the higher opening and can be very tall and wide, the door designer can opt for a much thicker barn door (which would be next to impossible to build and still maintain a good strength-to-weight ratio). Large sliding barn doors would be much less impressive, visually, if the size and weight of the sliding barn door hardware was reduced to match the weight of the interior barn doors. Sliding barn doors made with Sing technology are far more attention-grabbing when viewed by professionals who cannot understand how such large doors can be operated with such sleek and lightweight hardware.

To maintain the visual impact of the modern barn doors the designer may opt for very heavy duty barn sliding door hardware to achieve the impressive appearance from the barn door interior.

Also, barn door closet applications are quite the rage as sliding barn doors continue infiltrate the market of closet doors. So, be on the lookout for indoor barn doors as they become more commonplace as barn closet doors. You can get Sing closet barn doors directly from your favorite local door company, millwork or custom door manufacturer.

Interior Sliding Doors


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Unique Front Doors

When it comes to unique front doors, the top designers, architects and visionary end users, think outside the box to achieve the results of creating the best and most unique front doors of all.

The Only 50 Year Warp-free Guarantee and full structure warranty

Why all this fascination with unique front doors?

Think about it, what’s the first thing you see when you approach any structure? In most, if not all, cases, your first impression, the first noticeable component of any structure (beside the structure itself) is the front door. If the front door is unique and has enough impact, it will leave a lasting impression, reminding you of your visit at this specific location, every time you recall seeing such a unique front door.

Unique front doors are many times more effective than a calling card. In this day and age, anyone can find you within a few clicks, but how will they remember you?

How do you create unique front doors?

By thinking outside the box. First, you must determine what a unique door is not. Standard doors are a particular size and operate by swinging this way or that utilizing hinges installed on one side of the door. So, for your front door to be unique you must avoid both standard size and side mounted swing hinges.


Surprising your visitors with either sliding doors or pivot doors that are large in size are effective ways to leave a lasting impression as unique front doors.

Sliding Unique Front Doors

Sliding door make excellent unique front doors because you don’t see them every day, and if they are fairly large sliding doors, then even better. Sliding doors are the most popular alternative to the swing door, because they can still be thin (standard door thickness) but slide side to side. The structure will have to be wide enough to accommodate the sliding door, or in the case of double sliding door, the pair.

Sliding front doors can operate in full view exposing the sliding door in the open position, or as pocket doors, where the sliding doors are concealed in the open position as they retract into a cavity on the wall. Sliding pocket doors are a unique, more advanced approach to the unique front door quandary.

Sliding doors are standard fare, unless they are large sliding doors. Only then, designers and engineers start to run into problems associated with handling, accommodating, and the maintenance of large sliding doors over time. Why? Because large sliding doors warp, and when they do, the results are not pretty. That’s when architects and engineers begin specifying Sing Core in their designs. Large sliding doors with Sing Core inside are the only Eco-friendly lightweight high strength large sliding doors that can be guaranteed not to warp, twist, bend or otherwise fail (including full structure warranty) for 50 years!

Pivoting Unique Front Doors

The most impressive lasting impressions are left by structures hosting large pivot doors. Hands down large pivot doors outperform any other type of door in terms of garnering attention and leaving them something to think about (and talk about around the water cooler).

And big pivot door are not only taller and wider than the normal run of the mill side swing doors, but to raise the stakes even more, they can be many times thicker than an average door, guaranteed to make anyone stop and take notice.

Of course, these impressive large pivot doors are going to heavier than imaginable just by the sheer enormity of expanded height, width and thickness of your unique front door. This causes great expense in terms of manufacturing, shipping, handling, installation, hardware, and maintenance over time due to warping.

Exterior Pivot Doors

Whether you’ve decided to go with unique sliding doors or pivot doors, realizing that your unique front door will be presenting certain challenges, such as having one side facing the interior environment and the other facing the elements. That’s a recipe for disaster, because it will cause your door to move, and too much movement will compromise the doors integrity. Your unique front door might look gorgeous, but if it won’t secure or seal properly, what good is it?

Built with Sing Core Inside

When you build your large sliding doors or big pivot doors with Sing Core inside, you imbue your Eco-friendly insulated unique front doors with incredible attributes, such as, lightweight (a fraction the weight of other high performance large doors), high-strength (660+ PSI, stronger than steel pound for pound. This accounts for Sing Core’s responsibility in the creation of the best sliding doors and pivot doors.

Any Flat Building Material

Since we build to architectural specification, door blanks can be made and prepared with any flat building material as exterior finish, including any available species of wood (even wood planks), aluminum, brass, concrete, copper, fiberglass, FRP, glass, HPL, Kevlar, LVL, MDF, metal, steel (cold rolled steel, galvanized steel, hot rolled steel, stainless steel), just to name a few. This expands your potential creativity further knowing you are not limited to conventional building methods to achieve the high marks Sing Core brings to the table.

How to Build the Best Doors

Patented Sing Core is a unique hybrid solid structure core that maximizes old and new technologies in a honorably sustainable way by first using a modified torsion box structure (using vertical instead of horizontal wood grain), then the otherwise empty voids are filled with rigid recycled foam (EPS standard, other type of rigid foam/insulation available) adhered and sandwiched between two stress skins. The resulting large sliding door or big pivot door (which could feature any flat building material on the surface) is the only way to build a lightweight sliding door or huge pivot door without risk of failure, plus your premium unique pivot door could be covered by our,

50 Year Warp-free Guarantee

With Sing Core inside all of your sliding doors and pivot doors could be guaranteed not to fail for 50 years, including structure failure. Even if your guaranteed sliding or pivot door is damaged in any way (like running into it with forklift blades) it can be repaired to new condition utilizing basic carpentry skills without compromising the strength, performance or longevity of your unique front door.

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Sliding Patio Doors

Sing Core has long been the secret weapon of high end manufacturers or high end sliding patio doors used in mansions, exclusive high rise condos, and the most exquisite multimillion dollar estates in New York, around the United States and the world.

The Only 50 Year Warp-free Guarantee and full structure warranty

As ornate and beautiful as sliding patio doors can be, then can present problems over time, or from season to season, simply based on the changes in climate, especially if they have a certain degree of wood, which most high end clientele seem to like to adorn their sliding patio doors with. The result is a patio door that is similar in appearance to a wooden French door with a large window lite glass opening.

If the opening to the patio is large (which is usually the case for more high end homes) the bigger the door and the thicker the glass. This creates a very heavy door which can present challenges for both the structure and the associated hardware to accommodate such large sliding patio doors.

Sliding door hardware can be expensive, and since we are most likely talking about large and heavy sliding patio doors, they will require heavy duty sliding door hardware, which can be very expensive, often times more expensive than the sliding patio door itself.

To exasperate things even more, unlike interior sliding doors, sliding patio doors are exterior sliding doors. That means on side of the door faces the structure’s interior while the other side faces the elements, which could be quite a contrast on either side of the door. This could potentially cause the sliding patio doors to fail due to warping as it attempts to acclimate to its environment(s). If the sliding door adjusts itself too much, the result may be a sliding patio door that does not seal correctly, or becomes inoperable due to movement.

Other framing treatments may be applied to the sliding patio doors, especially in extreme weather variation locations, like fiberglass sliding patio doors or even aluminum sliding patio doors, in an effort to reduce the inevitable door failure either seasonally or over time.

Enter Sing sliding patio doors. While we do not build sliding patio doors, our sliding patio door blanks are used by the most prestigious door companies, millworks and custom door manufacturers. Using our patented lightweight high strength sliding patio door core, these highly skilled high end providers of the most impressive large sliding patio doors are able to deliver outstanding, nearly maintenance-free large sliding patio doors. These unique one-of-a-kind creations can be guaranteed not to fail due to warping, bending, twisting, or otherwise failing for a full 50 years, guaranteed, including full structure warranty. Even in extreme weather conditions.

Thanks to Sing Core, the best sliding patio doors can feature framing, even large wood framing of a moderate glass lite opening, or even be clad in solid wood, without fear of warp or structure failure.

Plus sliding patio doors with Sing Core inside weigh a fraction of the weight of other heavyweight solid core sliding patio doors. Sliding patio doors which are much lighter in weight reduces the need for heavy duty sliding door hardware, reducing the overall cost of the sliding patio door project altogether.

Other costs are also reduced due to the lighter weight Sing solution, including less handling and shipping cost, carbon footprint, transport, installation, and maintenance costs out of the gate, as well as over time. If your sliding patio door has Sing Core inside, you not only have the best door, but you have made a sound investment in a sustainable sliding patio door which will last the test of time.

You can have the only sliding patio door with a full

50 Year Warp-free Guarantee

No other company can do what patented Sing Core can do.

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Aluminium Sliding Doors

Sing Core is the number one source in America for Eco-friendly lightweight high-strength aluminium sliding doors made in the USA. Architects, millworks, artisans, industrial engineers, and door companies are raving about Sing Core being the only way to build lightweight large aluminium sliding doors that can be guaranteed not to fail for 50 years.

No other aluminium sliding door made anywhere in the world can compare to all the revolutionary characteristics of aluminium sliding doors with patented Sing Core inside, such as,

Lightweight Aluminium Sliding Doors

Aluminium sliding doors with Sing Core inside weight a fraction the weight of other solid core aluminium sliding doors, thanks to the combination of new and old technologies fused into a lightweight solid substrate that is lighter in weight without compromising strength.

High Strength Aluminium Sliding Doors

Sing Core imbues any aluminium sliding door with the strength that is far superior compared to any other lightweight structural building material. So strong, in fact, it was independently rated at 660 PSI; stronger than steel pound for pound. Not to mention,

Insulated Aluminium Sliding Doors

As if all the lightweight and high strength attributes were not enough, Sing Core comes along and ramps up the features to include packing the aluminium sliding door with rigid insulation material which adds both increased climate control and sound deadening qualities which are all the rage, adding even more value to any sliding door with Sing Core inside. But wait, there’s more…

Warp-free Aluminium Sliding Doors

One thing all architects and engineers agree on when it comes to large aluminium sliding doors, is that they tend to fail by moving (bend, twist, cup) due to warp, especially in an exterior sliding door application. Aluminum will bend according to sunlight and/or climate difference on either side of the sliding door, rendering it useless. A warped sliding door is a problem, that can now be fixed and backed by Sing Core’s

50 Year Warp and Structure Guarantee

Sing Core is the only aluminium sliding door that can be guaranteed not to warp, bend, twist or otherwise fail, including full structure warranty, for 50 years, making Eco-friendly Sing aluminium sliding doors the most long-lasting and sustainable sliding doors in the world, proudly invented and manufactured in the USA.

Other Metal Sliding Doors Available

Not only limited to our best selling aluminium sliding doors, you can have metal sliding doors made of any available flat metal material such as

Steel Sliding Doors
Stainless Steel Sliding Doors
Galvanized Steel Sliding Doors
Cold Rolled Steel Sliding Doors
Hot Rolled Steel Sliding Doors

Keeping in mind that any steel sliding door with Sing Core inside will be a lightweight steel door, which are also available in any other materials, including, say, a copper sliding door, or any other lightweight metal sliding door.

See Sing Core for all your sliding metal doors, if you’re interested in the next generation of lightweight metal sliding door.