Applications -> Building Components -> Doors

Types/Styles of Doors -> Sliding Doors -> Pivot Door -> Flush Door -> French Door -> Carriage Door

Large / Oversize Doors -> Standard Doors -> Exterior Door -> Interior Door

Door Skin Types -> Wood -> Wood Stave -> Aluminum -> Metal -> Steel

Door Finishes -> Specialty Doors -> Soundproof -> Fiberglass -> Fire Retardant

large oversize doors sing core

Click on the picture to see our oversized-door gallery!


Large Oversize Doors


Sing Core specializes in custom 1-off high-end large oversized doors, sliding doors and aluminum doors. Why? Because no other door manufacturers does huge eco-friendly doors better.The Sing Core Door manufacturing plant is set up especially to make panoramic doors that are up to 50 feet tall/wide, yet true flat, lightweight and stronger than steel.

See the Sing Best Door definition


Large extreme edge pivot swing doors with man door Center for Architecture Design Seattle singcoreHuge doors present a variety of complications for designers and installers. Due to structural changes in the materials and changes in the physical environment. A door that appears to be a perfect fit at the time of installation, most likely will be a huge disappointment over time. This causes extraneous maintenance fees, loss of energy, and lack of long life requiring early replacement.

True Flat – Guaranteed
Sing Core is the only door manufacturer that can create eco-friendly doors that can be guaranteed true flat regardless of the size, 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.

Energy saving doors are becoming more important especially when considering doors of large size. Sing Core large oversize doors are extremely energy efficient due to built-in insulation that adds both energy saving and sound deadening properties.

3-sliding-exterior-doorsSing Core large doors are not only Eco-friendly, lightweight and stronger than steel, they are extremely affordable when compared to other lightweight but strong materials.

The best-known, oldest, most reliable, high-end millworks in the United States depend on Sing Core to deliver the goods for them when it comes to large, oversize doors. Why? Because Sing Core large doors are the only oversized doors that can outperform any other door in terms of long-lasting satisfaction and guaranteed true flat. 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.

Challenges of door manufacturing are based on three factors:
1. The skin (surface material)
2. The thickness
3. Door size
Based on years of experience, we know how to manipulate those numbers to your best advantage to make certain that you get the results you desire. If you’re considering an immense large interior or exterior door, you should consider a Sing Core large oversize door that comes with a full 10-year structural warranty.

Some of our design solutions include very large doors, like large French doors, large church doors, large carriage doors, large closet doors, large cabinet doors and large front doors and in most cases to guarantee true flatness aluminum plays a part in the composite design.

Sing Core oversized entry doors, oversized French doors, oversized front door, oversized interior doors, large glass doors, large patio doors and large entry doors by far exceed the requirements of any other doors available on the market today.

When it comes to large exterior doors, large pocket door, large interior doors, large glass sliding doors, large garage doors or large wooden doors no other door manufacturers can deliver superior results, like Sing Core.

Whether you’re considering a large sliding glass door, large wood doors, large sliding doors exterior, large shop doors, large opening doors or large pivot doors, Sing Core is your one-stop solution for your oversize door, guaranteed.

Sing Panels For Oversized Doors

When you want to build with the best, you Sing panels. Sing Core makes the best large oversized doors. Click here to learn more.

Lightweight insulated door core 15' length

See Also: How to Build a Big Door


Sing Core makes the most dimensionally stable, eco-friendly aluminum doors that are used by the most prestigious millworks and high-end users. Only Sing Aluminum doors can be large, thin and extremely flat.

The beauty of Sing Aluminum doors is that they can be any height, any width, any thickness and can be manufactured in as little as three days. Sing Core doors are available in any size or shape per your specifications and specializing in large oversize doors are available in lengths and/or widths up to 50 feet.

The advantage of fusing the Sing Core material with aluminum, is that is nearly impervious to changing weather conditions and retains its true flatness and structural integrity over long spans.

But Sing Aluminum doors don’ t have to look like aluminum doors at all, because the aluminum can be part of the substrate which can host nearly any exterior material.

Add the elegance of solid wood butcher block to any project lightweight high strength

Sing Butcher Block

Available in Sing Butcher Block

Sing large oversized doors are available in nearly any flat surface material to meet or exceed your architectural specifications including our patented non-warping wood butcher block that could be used for almost anything. See: Butcher Block for ideas.

Some examples of exterior materials that we have made large oversize Sing Aluminum doors out of include:

  • aluminum (there are many varieties)
  • 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.

large-oversize-carriage-door-true-flat-garageFor 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 United States depend on Sing Core to deliver the goods for them when it comes to true flat aluminum doors.

This technology is solving heavy metal 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.

True Flat – Guaranteed

Sing Core is the only door manufacturer that can create aluminum doors that are 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 aluminum doors are lightweight, causing less strain on the structure and hardware, even though the size may be very large.

Years of working with the most demanding high-end clients has helped us understand unique requirement to guarantee true flatness of any Sing Core aluminum door. This does not mean that every oversized Sing Core aluminum door is guaranteed to be true flat under all conditions. But we can design the perfect Sing Core Aluminum Door for your specific requirements and guarantee it.

door large door large thin cabinet doorTo achieve our true flat guarantee, all you have to do is to provide us with the size (up to 50 ft), the thickness, surface material desired and the intended use for your Sing aluminum door, and we will design for you a door that will meet and exceed your specifications. Take advantage of our expertise and years of serving the most high-end clients around the globe.

Why Use Sing Aluminum for Door Substrate?

The primary advantage of Sing aluminum doors for the basis of any door is that the Sing Core aluminum door is lightweight, exudes superior strength and can be guaranteed true flat. Now, here’s the exciting part: almost any surface material can be added to the exterior of a Sing aluminum door to create the appearance (or match the appearance) of your structure.

By using this as the substrate of your door, you can create a door of any size (even over 10 feet tall) that is resistant to warp, twist and rot that can be structurally guaranteed for up to 50 years.

How to Coat your Sing Aluminum Door

Sing Aluminum Doors are so versatile, they can easily be painted, just like any other door. For successful painting use an etch primer, just like you wood any normal wood primer. The etch primer has an acid compound that etches itself into the aluminum, so no pre-sanding is necessary, follow-up with the same procedure for painting any other primed door. Of course, you could always add another surface layer of material to have any appearance you desire.

How to Cut, Rip or Trim your Sing Aluminum Door

Many of our clients order Sing Aluminum Door blanks by the truckload. These are basically unfinished, and the finishing, hanging and hardware is done by the client.

In the beginning, one might have concern over working with an aluminum door blank as opposed to a wood door blank in the wood shop that is customarily used for prepping the doors. The good news is that Sing Aluminum Doors can be cut, ripped or trimmed using standard woodworking equipment, There is not need to change saw blades or any other equipment in your standard door shop.

Our standard aluminum doors also offer superb sound deadening qualities and our eps foam offers a 3.5 R factor per sq inch of thickness. Other R-factors available upon request per your specifications.

Door finishers work with Sing aluminum doors just like any other wood doors. No special handling or extra tools are necessary to accommodate the installation of your Sing Aluminum door.

Click here for more information on Sing Aluminum and other Metal Options

To add solid wood grain to the exterior of your Sing aluminum door requires bonding plywood or MDF in-between the aluminum and the wood grain material.

For paint-grade aluminum finish, simply use an acid etching primer.

Click here for other Sing Core Doors

How to BuyMetal Composite Sing Core panels are true straight, light and strong.

To order Sing Large Doors submit an order form either by email,, or print and fax it to: 360.495.4585. We’ll provide a quote within one business day. If you have questions, please contact us.

Easy Ordering

All we need to know is the length, width, thickness and what you desire on the exterior, and your custom specialty panels are made to order. Getting a quote for your specialty product, is easy, thanks to our simple online order system.

Bulk Discounts

If you’re looking for a bargain price, remember, the more you order, the less expensive your total order will be per piece. Quantity and wholesale inquiries are encouraged. Feel free to contact us for more information. Click here for Closeout specials.

Fast turnaround: In you’re in a rush, only Sing Core can be custom made within 24 hours and is proudly manufactured for you in the USA.

Fast delivery: Any thickness and almost any length, less than 5 ft wide, can be made with in 48 hours if it is rush order.

SINGCORE Large Doors are easy to order. You may choose from our stock panels or order custom sized panels. Our price is based on the length, width, thickness, and quantity. Submit a Work Order by fax or email, and we will give you a quote within one business day. If you have a tight budget, give us a call, we might have an alternative solution tailored to your needs.

Ask about Sing Cores Premium Non Warp patented Sing door panel large