Rigid Foam vs. Fiberglass Insulation: Major Differences Rigid Foam Insulation Rigid foam insulation consists of panels sold in 4-by-8-foot sheets in thicknesses from 1/4 to 2 inches.

Foam board insulation is easy to use and a great DIY way to add some insulation. It comes in standard-size 4×8 sheets and smaller sizes, in thicknesses from 1/4-in. to two inches. Some types of ...

Foam Board Insulation Foam boards, also known as insulating boards or rigid foam panels, are firm structures used to reduce the amount of heat conducted through wood, wall studs and roofs.