Structural Fiberboard Sheathing

Stedi-R structural sheathing is used for above-ground insulating sheathing, and backer board under many types of exterior siding. It helps deliver R-16 ratings with 2 x 4 studs and R-13 fiberglass insulation.
Environmentally sensitive Stedi-R structural sheathing is available in thicknesses of 1/2" and 25/32", and in sheets of in 4' x 8' and 4' x 9'. It is also available coated on six sides.