Roofs are subjected to damage because of constant weather exposure. If you don't take care of your roof, molds, mildew and debris can cause structural damage and costly repairs. If you don't take care of your roof, molds, mildew and debris can cause structural damage and costly repairs. It is important you have the necessary tools to take maintain your roof. First you will need a utility knife. They can be used to cut drywall, trim asphalt roof shingles, and slice through fiberglass insulation. They are pretty safe to use since they have a retractable razor blade. Besides a utility knife make sure you invest in a roofing hammer with a straight claw. To cut wood, shingles or roofing panels, a circular saw would be a worthwhile investment. This electrically-powered tool can cut roof panels and plywood sheathing into various different sizes. To hammer nails in, abandon the manual hammer and opt for a nail gun. Compressed air is used to push the nails from the loaded gun strip unto the sheathing or shingles.solar panel for commercial building