How to cut foam board insulation

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The problem with traditionally insulated rooms above garages is that there is no thought given to stopping the movement of air through the insulation. For a primer i would. What is the best way to cut foam boards? How do you cut rigid foam insulation? How much does a foam board cost?

Measure your cut with a straightedge ruler. Mark your cutting line on the foam with a permanent marker. Place your straightedge ruler on the rigid foam. Lay the rigid foam insulation on a flat.

How to Cut Rigid Insulation. If only one side is foil-face lay it foil-side up. Use a measuring tape to find the place you want to cut , and place a straightedge along the line to. When it comes to cutting rigid foam insulation , one of the easiest ways is to use a fine toothed handsaw. This way, you can vacuum the fine foam created by the fine teeth more easily.

However, you can also opt for the tip of the blade of a craft knife to score a line. There are several ways to cut ridged insulation , depending on the thickness. I have found with thicker boards you can actually use a circular saw. To attach the insulation, you can use screws with large washers, a special adhesive made for adhering foam board insulation or, for smaller pieces, you can seal them in with caulk or spray foam.

Knowing just how to cut foam board and still have the edges look nice can be a tricky thing. Foam boards are frequently used by architects to make models of what they plan on building, to create signs or posters, as a form of insulation , or any number of other things, each of which needs the edges to have a sharp, clean finish. Foam board is more expensive than fiberglass batt insulation but it installs in a similar manner. The panels may be cut with a straightedge and a utility knife, or on a table saw. The best way to install foam board insulation under drywall is to frame the wall with 2x3-inch lumber for the top and bottom plates and 2x2-inch lumber for the studs.

Cut your foam insulation panels to fit between the furring strips. Cutting Foam Board Insulation. A popular option is to use a fine toothed hand saw.

The fine teeth will create a. Use a utility knife and straightedge to cut through thin board in several passes. Cut slight curves with a long blade. All of our Insulation Straight Blades fit in your recipro-saw.

Having no money, I cut through five-inch-thick foam sections by making repeated swipes with a cheapie utility knife like the one above. It was time-consuming, messy, far from accurate, and doing the curves was a real pain. Re: Best way to cut rigid foam board ? Serrated blades are great for cutting thick foam.

If you are cutting inches thick or less try an Olfa L-utility knife. Good clean accurate cuts. Lay a piece of foam insulation board on a table, and using a tape measure, locate the proper cut mark following the measurements you took in Step 1. Draw a pencil line on the foam at that point. Place a straight edge on the line, and hold it firmly in place.

Foam board insulation is commonly placed against the steel building siding, between the girts of exterior walls. To prevent air infiltration, place rigid insulation boards tightly together and seal the seams with tape or caulk. This practice may worry some in cold climates since the foam board may act as a second vapor diffusion retarder. Smaller and more manageable 2-foot by 8-foot and 4-foot by 4-foot sheets can sometimes be purchase as well. Work only with the right supplies to make a clean slice through the foam and leave a clean cut behind.

Just about any tool short of a paintbrush will cut pink foam , but I generally use one of these: Saw. If you do, get some foam cutting blades, that are more like knives. Handsaws are fine and less messy. I like the Japanese style that cuts on the pull.

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