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Contents of Sing Door

Applications -> Building Components -> Doors -> Contents

Door Products

Sing Door Core

Sing Door Sandwich

Sing Door Panel

Door Applications

Interior Doors

Exterior Doors

Single Leaf Door

Flush Door

Moulded Door

Composite Door

French Door

Panel Door

Stile and Rail

Plank and Batten Door

Ledged and Braced Door

Frame and Filled Door

Wicket Door

Sliding Door

Glass Sliding Door

Bypass Door

Pocket Doors

Barn Door

Interior Barn Door

Ledge and Brace Door


Door Alternatives

Fiberglass Doors

Aluminum Doors

Steel Doors



Rotating Door

Pivot Door

Revolving Door


High Speed Door

Clean Room Door

Refrigeration / Cold Room Door


Blind Door

Gibb (Jib) Door

False Door

Invisible Door


Half Door

Dutch Door

Stable Door


Double Leaf Door

French Door

Garden Door

Rebated Door

Australian Door (double plywood swing doors)

Barn Door


Saloon Doors

Café Doors

Batwing Door


Bi-fold Doors


Garage Doors

Carriage Doors

Overhead Door

Sectional Overhead Door

Roller (Tambour) Door

Roller Shutter


Specialized Doors

Sound Proof Door

Fire Door

Impact Resistant Door

Extreme Weather Door

Weather-proof Watertight Wood Doors

Bulletproof Door

Blast Door

Trap Door

Pet Door


Architectural Doors


Sing Door Data

Types of Wood Doors

Door Blanks

Skin Options

Technical Information

Clients List

Industrial Links

Assembly & Connection

Door Frequently Asked Questions

Door Specifications


Photo Galleries

Carriage Doors Gallery

Sliding/Pocket Doors Gallery

Interior Doors Gallery

Exterior Doors Gallery

Overhead Doors Gallery


How to Build

How to build a true flat door

How We Build Our Doors (The Best Method)

How We Build Our Doors (The Second Best Method)

How to make a Sing Door with glass

Carriage Doors

Sliding/Pocket Doors

Sliding Glass Doors & French Doors

Stile and Rail Doors

Interior Doors

Exterior Doors

Overhead Garage Doors


Sing Door News

New Door Tech vs. Old Door Tech

True Raised Panel Door

True Flat Sliding Doors

Sing Modern Sliding Barn Door

More People Switching from Overhead Garage Doors to Carriage Doors

$58 Door vs $580 Door Comparison

3 Types of Large Wood Grain Doors

New Doormaking Technology

Best Door in Manhattan

Architectural Specification Substitutes

Free Custom Window Glass Openings


Door Cores

Hollow Core

Lattice Core

Honeycomb Core

Corrugated Cardboard Core


Sing Core

Stave Core

Solid Core

Particle Board


Door Skins










Door Sizes

Standard: 36” x 80”

Exterior and Passage: 2’ 6” to 3’ wide x 6’ 8” height

Closets: (vary)

Oversize / Large Door: 8′ + tall and/or 4′ + wide

Garage: 7’ to 8’ wide

Double-car: 16’ wide


Door Hardware





Door Handles


Crash / Panic Bars

Pull Handle

Door Fasteners

Door Locks





Strike plate

Sliding Hardware

Sliding Door

Sliding Barn Door

Pocket Door

Wall Mount




Door Closer

Door Opener

Door Damper

Door Knockers

Finger Plate

Letter Box / Mail Slot


Door Safety

Door Stops

Door Guards


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Large Oversize Sliding Doors

sliding-door-perfectly-straight-gap-high-performance-pocket-door-true-flat-high-end-guaranteedTrue Flat for Perfectly Straight High Performance

When our clients will not settle for second-best, they rely on our expertise in making true flat sliding doors that are perfectly straight for high performance to satisfy the most demanding applications.

Big sliding doors present challenges because the slightest warp, twist or cupping can not only affect the performance, but possibly more importantly, any deflection will be noticeable in the gap between the door and the wall.

In most cases, nearly any sliding door will appear to be straight upon installation, but only Sing Core sliding doors can maintain their true flat integrity for centuries and are guaranteed for up to 50 years.

When it makes sense to seek out only the best tried and true flat solution in sliding door technology regardless of size, you will agree with our clients that Sing Core is the only solution (see testimonial).

Warp free large sliding doors by Sing Core

Big Sliding Doors

Sing Core is the secret ingredient inside our large, oversize sliding doors and other large doors that are true flat, eco-friendly and built to last.

If you are looking for a large sliding door solution that gives you the Sing Core sliding door advantages, like light weight, superior strength, long life and flat, then you’ve come to the right place.  Just let us know your expectations and based on our expertise, we will be able to provide you with a solution that we can guarantee.

Sing Core big sliding doors are not only revolutionary in their design, but each huge sliding door helps to make the world a better place. With our commitment to sustainability you can have an American-made, eco-friendly large oversize sliding door that will last the test of time.

For the last few years, this emerging aerospace technology has been providing solutions to architects and designers that is top drawer, to say the least. The best-known, oldest, most reliable, high-end millworks in the

museum sliding doors (3)

United States depend on Sing Core to deliver the goods for them when it comes to large, oversize sliding doors.

This technology is solving large oversize sliding door design solutions for Presidents, Prime Ministers, Kings and the Pope, especially when the application calls for extra strength, oversize or true flat… without compromising weight for strength.

Sing Core is making this technology available to anyone who wants a large fashionable, lightweight sliding door, like:

  • Aluminum Sliding Door

    Large Aluminum Door

  • Indoor Sliding Doors
  • Outdoor Sliding Doors
  • Warehouse Sliding Door
  • Large Room Dividers
  • Great Room Separators
  • Large Sliding Barn Doors
  • Oversize Sliding Garage Doors
  • Big Sliding Glass Doors
  • Large Sliding Partitions
  • Large Sliding Room Partitions
  • Big Sliding Shop Doors
  • Immense Sliding Walls
  • Large Sliding Wardrobe Closet Doors
  • Huge Vinyl Sliding Patio Door
  • Oversize Wood Sliding Patio Door

Just to name a few. The beauty of the Sing Core large oversize sliding door technology is that your door can be made out of nearly of any exterior material that you can imagine and we can guarantee your big door to be true flat over long spans, and will not warp, twist or experience extreme deflection under stress. And, thanks to the lightweight properties in comparison to other solid materials available, Sing Core oversized doors though large in size, are lightweight, causing less strain on the structure and hardware. Sing Core doors are available in any height, any width, any thickness.


large sliding doors guest bedroom lightweight high strength stronger than steel 50 yr warp free guarantee



Some examples of materials that we have made sliding doors out of include:

  • aluminumBack Camera
  • cement board
  • ceramic tile
  • concrete
  • fiber glass
  • glass
  • MDF
  • metal
  • plastic
  • plywood
  • solid wood
  • stainless steel

… including ballistic materials for bulletproof applications. The possibilities are limited only to any available flat building material.


Sing Core Large Veneer Doors

As one of our high end options we offer the most appealing wood veneer doors for your enjoyment.  With our special core and patented and patent pending methods, we supply exquisite hard wood veneer doors that appear just like solid wood, even when looking at our doors from the side.  This allows you to achieve the beautiful look of solid wood while still maintaining the weight advantage of using our patented and patent pending core.    

Hemlock Large Veneer Doors

No one else can make a large veneer door like ours.  Because of the warp free quality of our doors we can make them bigger, stronger, lighter in weight, and more warp free compared to other large veneer doors.  Through our patented and patent pending methods, we have solve all of the problems with making large veneer doors to any specifications.

White oak large veneer door



Remember, Sing Core technology is completely customizable to your specifications as they are available in any length, any width and any thickness and bonded to any exterior finish.

We are so certain that Sing Core is the solution to your green building challenges that we offer a 100% refund for any prototype order, for those who want to test drive any form of Sing Core products for use in their applications, so you have nothing to lose. Click Here for our convenient online order form.










sliding door

Your sliding door could be a giant chalk board or magnetic display

See also Sing Honeycomb Sliding and Pocket Doors, Sliding Patio and French Doors and Doors