Torsion Box


Sing Core Torsion Box Panels

    Patented Sing Core: We put a torsion box in the SIP panel to make it better. The other names for our panels include sandwich panel, honeycomb panel and lightweight panel.


Sing Punch-Proof Doors

SINGCORE-The torsion box core makes it impossible to punch through and destroy.


torsion box, sandwich panel, honeycomb panel, lightweight panel
Punch proof Sing Core door.
Typical paper core door. (click to see more)


What door companies do not want you to know.

As long as you cannot see the paper core hide inside the door, they will not change it to Sing core. Sing core does not cost not much more than core made of paper but is at least 49 times stronger.

Punch through a Sing door and you will break your hand. If you can manage to punch through a Sing core punch-proof door and don’t break your hand then you will get a free sing door from us.

The most common doors used in most homes are paper core doors. With one punch you can destroy one of these flims doors. Once the door is broken you will need to take it to a door shop to get if fixed or replaced and then take it back and install it. The cost is not only a door, it is how to dispose of it, take it in and out of the shop, build or replace the door and install it. Why not just buy a Sing door to begin with. Sing doors are not much more expensive than paper core doors when consider the life span and they are free. What is your time worth?

Stronger than Steel,

Lighter than Wood

Your door doesn’t have to be steel to be strong. Sing Honeycomb Doors are stronger, lighter and more stylish than steel and vinyl doors due to the torsion box core.

Sing Doors are more stable, insulated and lightweight than solid wood doors. The torsion box core holds the Sing Door Panel flat so that it willnot warp and sag like ordinary wood. A 16lb steel hammer will easily dent a steel or vinyl door, but not a Sing Door. Because Sing panels are efficient to produce, they are more affordable than solid wood doors.

    Patented Sing Door Methods

    Sing Honeycomb doors are versatile, and customizable. Even the technoly used to construct the door can cater to our customers' individual needs.

    To see more torsion box pictures and web sites visit the Google image galery.

Technical Info



Price & Order


Related Product Links

Door Home
Carriage Doors
Sliding/Pocket Doors
Sliding Glass Doors & French Doors
Interior Doors
Sing Stile and Rail
Exterior Doors
Overhead Garage Doors


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