Your roof is your main barrier against moisture inside your home. To ensure that it performs well and keeps you dry, it needs to be repaired properly when there is a problem. Keep an eye out for these common repair issues that can lead to a leaky roof.

Problem #1: Re-shingling

A re-shingled roof is when a new layer of shingles is affixed over the old, without removing the old first. Some people think this gives a double layer of protection, but this isn't the case. First and foremost, the old shingles could be covering damaged or rotting sheathing that needs replaced. The waterproof membrane beneath the old shingles could also be damaged. Another issue is that new shingles are more likely to come loose or moisture is more likely to become trapped between the two layers of shingles, resulting in a leak.

Problem #2: Caulking

Caulking on its own isn't detrimental to your roof. The problem only occurs when it is used improperly. Caulking is almost always used in conjunction with metal strips of flashing around chimneys, vents, and other rooftop items. The caulk seals the edges of the flashing. If caulking is used on its own, it will eventually weaken and crack, exposing the area to moisture seep.

Problem #3: Tar Repairs

Roofing tar is sometimes used as a quick fix to plug a leak. It may be smeared along the leaking valley of a roof, used to cover a nail hole, or used instead of flashing around a chimney. Much like caulking, it will begin to deteriorate and crack rather quickly when used in this manner. If you notice tar repairs on your roof, it's time to call a roofer in to get the area properly fixed.

Problem #4: Patches

A patched roof doesn't necessarily indicate a problem. It is only a concern if the new shingles were installed poorly. Shingles are made to overlap, which means they are typically laid from the edge to the peak. When only a small area of new shingles are applied, the roofer has to make sure the top shingles are over the lower shingles. In a poor repair job, the lower shingles are applied over the top of the top shingles, and then roofing cement or mastic is used to seal the top edge against water exposure. This patch won't last for long, though. The cement will give out and a leak will ensure.

If you suspect any of these issues with your roof, call a professional roofer, like those at General Roofing, out to perform an inspection and to remedy any problems.