Looking for a Roof Leak
When you’re attempting to hunt down a leak, start by finding the roof uphill from the stains. The things to look for is any roof penetrations. Items that penetrate the roof are the most normal source of leaks. In fact, it’s rare for holes to build up in open areas of continuous shingles, even on older roofs. Infiltration can include roof vents and plumbing, dormers, chimneys, or other things that projects through the roof. They can be a few feet above the leak or to the right or left of it.
Go to the Ceiling With a Flashlight and Look for the Marks
If you have access in the attic, the easiest way to track down a leak is to go to the ceiling with a flashlight and look for the marks. There will be water stains, mold or black dots. But if access is an issue or you have an arched ceiling, you’ll have to go up onto the roof and examine look for the cause.