Roofs are subjected to damage because of factors such as extreme weather conditions and poor maintenance. If your roof isn't taken care of, molds, mildew and debris can build up. If your roof isn't taken care of, molds, mildew and debris can build up. It is important you have the correct tools to take care of your roof. Make sure you have a utility knife. Utility knives can be used to cut drywall, trim asphalt roof shingles, and slice through fiberglass insulation. Utility knives are quite safe to use since they have a retractable razor blade. Aside from the utility knife, you will also need a roofing hammer that will refasten shingles and other roof coverings. A roofing hammer has two different head styles: one has a curved claw and the other has a straight claw. Most commercial roofing contractors Superior, WI recommend the straight claw hammer. Invest in a circular saw to cut singles or panels. This electrically-powered tool can cut roof panels and plywood sheathing into an array of different sizes. Roofing nail guns are very efficient tools for hammering nails in. Compressed air is used to force the nails from the loaded gun strip unto the sheathing or shingles.