Make acoustic panels for your recording studio or home theater

Step 5 Trim the fiberglass

The fiberglass needs to be trimmed to fit inside the frame (since we built it to 2' x 4' outside dimension). Use a utility knife to trim 1 1/2" from both a long and a short side. This can also be done on a table saw, but we found that the utility knife keeps the fibers and dust in a smaller area. Do not use a hand saw, as it will shred the board more than cut it.

Use caution when cutting fiberglass. Wear long sleeves, gloves, a breathing mask, and proper eye protection to prevent the fibers from causing irritation. When you are done cutting, thoroughly clean your work area with a broom, vacuum cleaner, and damp cloth.

NOTE: A perfectly straight edge isn't too important since the board will be covered by fabric anyway. We found it better to aim for cutting slightly less off than to cutting more, because the extra friction helped keep the board in place while covering it with fabric.

Comments

[MatrixDweller]

Best tool, bar none, for cutting rockwool or fiberglass board is an electric carving knife. Very little mess and it cuts through like butter.