Best Way To Cut Thin Sheets Of Fiberglass Batts

Use a board to compact the insulation and provide a straight edge for cutting.

Best way to cut thin sheets of fiberglass batts.

You can use a jigsaw to cut the fiberglass paneling if you use a blade made for cutting metal. Then cut a 2x4 at least 12 inches longer than the width of the insulation. Without any delay lets look at the ways to cut fiberglass panels. Draw a straight line between these points using a yardstick as a straight edge if necessary.

So this completely depends on tools you choose. Fiberglass is hard and will quickly dull any wood cutting blade. Plus you can choose between 3 4 and 5 inch trimmers. Tip for cutting fiberglass insulation easily.

We re using unfaced batts that are sized to friction fit into standard stud spaces either 16 in. Batt insulation is commonly made of spongy fiberglass or glass wool. To speed up the process and produce a clean neat cut every time lay the insulation on top of a scrap piece of plywood with its foil or kraft paper vapor barrier facing up. You can cut mild steel up to about 3 8 in.

Of length for a tighter fit. Folding or tucking pieces too tightly between openings compromises its r value or thermal. A trimmer is lightweight and powerful and it easily cuts through hard fiberglass such as that used in paneling. Frp is a commonly use covering in commercial food prep and for restrooms as it is imune to most all cleaners and disinfectants.

Cutting fiberglass panels isn t difficult but keeping them from splintering chipping or throwing harmful fibers is. It can be cut with any saw using a fine blade although carbide is best. Cutting batts of fiberglass insulation takes forever because the batts are so thick and fuzzy. Thick using a ferrous metal cutting blade.

Mark the start and end point of your cut with a water soluble marker. It may not be an obvious choice but fitted with the right blade a circular saw is a great metal cutting tool. Leave an extra 1 2 in. Tips for cutting batt insulation.

In our test it cut through rebar like a hot knife through butter. Extend the blade all the way out to provide a long sharp edge that perfect for cutting through thick insulation. The thing to avoid is vibration it is a brittle material so support it from below and keep your saw tight to the material. Cut batts to length by setting the top of the batt into the space and cutting against the bottom plate with a sharp utility knife.