FAQ Knowledge Articles

To estimate the weight of your Bi-Fold door, use 7 pounds per square foot of the door rough opening (RO) if it has non-impact glass.  If the door is to have impact rated glass, use 9 1/2 pounds per square foot of rough opening.  This will help to determine the additional weight that the header needs to support so that it deflects no more than 1/16".  Meeting this deflection requirement will ensure that your Bi-Fold door operates properly.

For more information, see:
Marvin Bi-Fold Door