Adding insulation is a very do-it-yourself-friendly project that pays big dividends, so it just makes sense to take on the task yourself. If you do, remember these tips, and you’ll save a few hassles.
To cut insulation squarely and accurately, use a utility knife with a snap-off blade. Extend the blade all the way out and lock it. The resulting 3- to 4-inch blade will make it easier to cut through thick batts of insulation.
Use the straight edge of a piece of wood, lay it across the insulation, then kneel on one end of the insulation to compress it. And run the blade down the edge of the wood for a nice, square cut.
Remember, to keep the fibers from irritating your skin you need to wear a long-sleeved shirt, pants, gloves, dust mask, and safety glasses.