Best Way To Cut Thin Sheets Of Fiberglass Batts

Without any delay lets look at the ways to cut fiberglass panels.

Best way to cut thin sheets of fiberglass batts.

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. In our test it cut through rebar like a hot knife through butter. 2 clamp the fiberglass sheet to a. Mark the start and end point of your cut with a water soluble marker.

Plus you can choose between 3 4 and 5 inch trimmers. A trimmer is lightweight and powerful and it easily cuts through hard fiberglass such as that used in paneling. Thick using a ferrous metal cutting blade. Of length for a tighter fit.

You can use a jigsaw to cut the fiberglass paneling if you use a blade made for cutting metal. To cut thick batts or rolls of fiberglass insulation easily use an extendable utility knife that has snap off blades. The thing to avoid is vibration it is a brittle material so support it from below and keep your saw tight to the material. Batt insulation is commonly made of spongy fiberglass or glass wool.

Then cut a 2x4 at least 12 inches longer than the width of the insulation. Tips for cutting batt insulation. Hot metal chips will fly everywhere. You can cut mild steel up to about 3 8 in.

Use a board to compact the insulation and provide a straight edge for cutting. Cutting fiberglass panels isn t difficult but keeping them from splintering chipping or throwing harmful fibers is. Tip for cutting fiberglass insulation easily. Draw a straight line between these points using a yardstick as a straight edge if necessary.

We re using unfaced batts that are sized to friction fit into standard stud spaces either 16 in. It can be cut with any saw using a fine blade although carbide is best. Folding or tucking pieces too tightly between openings compromises its r value or thermal. So this completely depends on tools you choose.

Extend the blade all the way out to provide a long sharp edge that perfect for cutting through thick insulation. Cutting batts of fiberglass insulation takes forever because the batts are so thick and fuzzy. Fiberglass is hard and will quickly dull any wood cutting blade. It may not be an obvious choice but fitted with the right blade a circular saw is a great metal cutting tool.