Place the foam marked side-up on top of an old piece of plywood used as a work surface to protect the floor. Secure a metal straightedge along the cut line with. When Chris Ellis of Brewster, Mass.
Foam board insulation is often used in garages, work sheds, or other spaces that may not require. Teamed up with a straightedge, a sharpened putty knife cuts through foam like butter.
Cutting Foam Board the Easy Way (more or less). By heating a thin blade you can quite easily cut your foam to. This is a great video on how to cut pink insulation board with a common tool. I use a jig saw and a re purposed.
Feb It is very important to take accurate measurements when cutting foam board. When insulating with rigid foam, even small inaccuracies can lead to.