A leaky roof due to rain is a sign that something is letting water in. Make sure your roof doesn't have other problems, like clogged gutters, pest infestations, or plumbing issues that let rainwater into your home.
It can take years for water to seep in and damage the roof if nail holes remain in old vents or anything else that was previously put in place. A piece of roof flashing can be slipped under the shingle to fill in a nail or screw holes.
You may want to check your pipes and roof vents to see if water is getting in from those areas. On the metal vent flashing, look for cracks in the seams or cracks in the base of the rubber flashing.
The harm a tree may inflict on a roof has no bounds. The trees surrounding your home should be checked and monitored annually to ensure they are healthy and stable.
Your roof shingles should be repaired as soon as possible if they have been damaged. Be especially careful not to damage surrounding shingles or roof deck when prying nails out.
A clogged gutter can also cause roof leaks. When debris accumulates in the gutter, it is impossible for it to function properly as a drainage system. The gutter can start to collect water and cause the shingles to swell.
Roof leaks can occur more often if they come from joints. Cracks in the roof, as well as drywall and aluminum flashing on the surfaces they join, can allow rainwater to enter your home.