There's a Better Way: Cutting Rigid Insulation
Teamed up with a straightedge, a sharpened putty knife cuts through foam like butter
When Chris Ellis of Brewster, Mass., was looking for the right tool to cut rigid-foam insulation, he tried a utility knife, a kitchen knife, and a saw. None of those options worked especially well. So Chris created something that works beautifully. As Chuck Miller demonstrates in this video tip, a 3-in. or 4-in. putty knife with a sharpened blade cuts through the foam like butter.