A roof is constantly exposed to the elements. If you don't take care of your roof, molds, mildew and debris can build up. It is important you have the proper tools to take maintain 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 the razor-sharp blade can be retracted. In addition to the utility knife, you'll 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 find a roofer in my area Esko, MN recommend the straight claw hammer. To cut wood, shingles or roofing panels, a circular saw would be the best tool. A circular saw is an electrically-powered tool can cut roof panels and plywood sheathing into an array of different sizes. To hammer nails in, abandon the manual hammer and opt for a nail gun. Compressed air is used to force the nails from the loaded gun.