Sing Core introduces the problem-solving warp-free large sliding door systems to custom fit any opening, up to 40 feet wide or more, that are fully insulated for sound dampening and climate control, lightweight, and stronger than steel pound for pound.

Sing non-warping large sliding doors, create large exterior openings that provide superior weather performance when closed due to the high precision manufacturing process featuring insulation values to meet or exceed your architectural door specifications.

This unique patented and patent-pending large sliding door technology allows door designers, architects, and highly specialized door engineers to create large sliding doors of enormous size with the highest performance standards, each of these unique large sliding panels, providing additional strength and protection to any space from industrial and commercial to utility and residential applications.


It might not be uncommon for you to be looking directly at a product with Sing Core inside when you are in the presence of large sliding mirror wall panels. Large sliding mirrors could be extremely dangerous if they are not attached to a wall’s surface area. Free-hanging large mirrors creates many challenges. That’s why the best large mirror sliding door has Sing Core inside, with its “unbreakable mirror” technology.

Among the high-profile museums and art galleries, entire sliding art walls are also examples of Sing Core’s best of show, which are basically the same as our interior sliding doors, specifically designed for displaying art in the most elegant ways.

You may also find Sing Core inside uniquely fashioned large patio doors, which can limit the view when closed, or have large window openings, such as French doors, and can be one large sliding door, or multiple sliding doors when used as multi-slide patio doors.

Large door openings are made for Sing American French doors or large sliding doors guaranteed to insulate any interior space from and exterior conditions with specially designed swinging doors and French doors, each one an individual work of art, proudly made in the USA.

The Sing Core factory is nestled inside its remote location in the scenic Pacific Northwest where all the magic happens and inventor Peter Sing works in tandem with the largest door companies in the world to create one-of-a-kind doors that can be guaranteed not to warp, bend, twist, or otherwise fail for 50 years.

50-year Warp-free Guarantee

There is only one way to build a warp-free door. So, if you have an Eco-friendly lightweight long, large sliding door installed in your doorway opening which is stronger than steel and has a 50-year warp-free guarantee, you can bet it has Sing Core inside.

No matter whether you’re looking for the perfect large feature doors or large factory doors, you know that you can depend on Peter sing’s invention(s) to have the best large sliding door solutions for all your aviation, commercial, industrial, agricultural metal building system needs.

Sing’s reinforced insulated torsion box core has revolutionized traditional sliding door technology, which can be applied to any functional door application from large opening folding door systems to sliding doors for large façades.

Eliminate heavy regular maintenance of your large format interior or exterior sliding door systems by applying the most innovative solutions by Sing’s True Flat Team, who help create larger sliding doors than were fiscally unapproachable before.

New possibilities abound when you no longer have to worry about having to deal with all the challenges that are associated with large heavy door, when you can create lightweight high strength doors in any shape, style, or size with Sing Core inside.

And how easy is it for you to get this new generation of large sliding door?

Just go to your favorite custom large sliding door company and tell them what you want, the height, width, and thickness, as well as the exterior surface material you would like to see on your door, and if you want one of the best doors in the world, make sure you tell them, “I want Sing Core inside.”