Cutting through both thin and thick foam board works best when the cuts are straight lines.

Cutting foam board curves. With a small, sharp craft knife,. This is a tip s. Best way to cut foam board may be you are a designer, architecturer, or in a related field and would like to create some props, mounts, architectural models, or other stuff.

You don’t want to cut your shape and then find. Now use your band saw (or jig saw) to cut all the way through the cutting board. Whenever you’re cutting foam board, always make sure your blade is going all the way through the whole thickness of the board.

It is more solid in the center, which is why it is sometimes referred to as rigid foam insulation. Figured i'd do a quick vid to show my technique.url to the 3d plans for the knife handle i am using ht. As with the long blade utility knife, you’ll want to cut in a smooth motion without sawing to keep your edges clean.

It has a cutting width of 4.5 inches and a depth of 6 inches, making it ideal for trimming off the excess or for cutting curved edges that would be difficult with a knife. Straight cuts in rigid foam insulation board are easy with a razor knife. For best results, follow these steps for cutting curves and cutouts in thick foam board:

You should cut this kind of foam board with the ridges on the bottom. Scoop enough foam to fit comfortably in your hand and hold it between your fingers, so there are at least three fingers exposed. Use a utility knife and straightedge to cut through thin board in several passes.

Lay the blunt side of the knife directly above a part. Using a marker, draw your desired shape onto the thick foam board. Curves are harder, and can be messy if you use a saw to cut them.