When you notice water stains on your ceiling extending all the way to your walls, it’s usually a sign of roof leak. Although minor leaks have an easy fix, tracking their source can be difficult since it’s often away from where the leaks appear. Some Palo Alto, CA roofing contractors share simple tricks for finding the source of roofing leaks.
Look for daylight holes. Look for water marks and discoloration on the roof. Turn off the light and try to find holes on the roof where daylight shows through. A wood-shingle roof has many of those, but overlapped shingles only has them where they leak water.
Scan the roof surface. Using a bright flashlight, start above the area where the drip is coming from and work your way up the roof, checking along the framing members for wetness. Be careful to step only on secure framing members and not on insulation of the ceiling below as these cannot support your weight.