Damaged, corroded, missing, or cracked shingle can be the cause of a leaking roof. Leaking roof is a hassle and you do not want to have one especially during rainy seasons. Leaking roof can mean disaster especially if you have little kids running around the house, not to mention untidy especially when water mix with dirt on the floor. Then you'll have mud to clean up.
You want the damaged shingles to be repaired or replace ASAP. To start your roof repair project specifically damaged shingles here's how you can do it:
First, take out the damaged shingle by lifting the edges. Using a pry bar, remove the nails around the corner of the shingles to slide it off. Dust off any bits of cement and when there are lose nails also take it out. For firm nails, should be left as it is.
Second, to slide new shingles in place easily, trim the back corners slightly to make it round using a sharp utility knife.
Third, slide shingles Firmly into place. Make sure that it is aligned on the shingles beside it and its back carefully lodged just below the rows above it.
Fourth, with the new shingle firmly fixed in place, elevate the edge of the overlapping shingle and attach the top the new shingle to it with the 6d galvanized roofing nails. Roofing nails should be hammered at each corner. Cover the nails with cement, smooth the top to water and wind proof it.
When replacing a row of shingles, you have to make the back corners rounded the part that run into the above rows. You can apply this to tent-shape and ridge shingles. Ensure that shingle overlap on every side. Do not attempt to use flat hinges over ridged or ten-shaped ones as it make it uneven and water would be easier to see in. Just use the same type. Always apply cement benefit each shingle before affixing it to place, then nail each corner with roofing nails, afterwards, smoother it with cement.
After doing roof repair specifically replacing damaged shingles, check the flashing around your vents and chimney or between pitched roof surfaces. If you see cracked or insufficient caulking around your vents or flashing, cover it immediately with roof cement or compound. The same should be done in areas where caulking is thinning or worn out. The cement should be spread liberally covering adequately suspicious surfaces.