The first thing that you have to do is to ready the materials you would need in the roof repair. You would need binoculars, flat-soled shoes, weighed markers, hammer, nails, metal bristles brush, rags, sharp knife, roofing cement, trowel, roof patching fabric and gloves.
Check out your roof for any signs of imperfections in it. You need to use the binoculars to scan your roof from the ground. Take note of all the problems you see on your roof. Now try walking all over your roof. Begin walking on one end and walk on every possible areas. Again, take note of the possible problems you see on the roof.
Observe all of your vents, skylights and air conditioning units. You need to look for places in which the roofing feature is separated from the roof. Find the places where the roofing tar or cement has cracks. Now, get a flashlight and start looking for water trails inside your home. Look for the origin of the leak and pierce that part with a nail. This is done so that you can identify the place later. If you see sunlight shining in from the ceiling, pierce a nail on that part too.
Before doing this next step, make sure that you have found all the origins of the water leak. Now, go to the shingles that you’ve identified to have problems. Pull up those shingles and apply roofing cement beneath it. Replace any nails on it and cover those nails with roofing cement. Now, you need to repair the roofing cement or tars that have cracks. Usually, you have to remove the fixture (such as the air conditioning unit) to repair the crack. Remove the old roofing cement/tar, clean the area and let it dry. Put the fixture back and put roofing cement on it and the roof itself. Put small holes on the cement to drain the water.
Fix any cracks and other source of leaks in flat roofing materials. Put roofing cement on it, then a piece of roof patching fabric and add roofing cement. With this, roof repair should be complete.