Rigid Foam Has A Range Of R-Values Rigid foam, or foam board insulation, is another popular option for the garage ... But it has poor resistance to moisture. Extruded polystyrene, or blue board, is ...
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 ...