How To Spot Roof Leaks

Start indoors, without taking risks

Photograph new stains and record whether they appear during wind-driven rain, snowmelt or even dry weather. These observations help distinguish roof entry from other moisture sources. Do not enter an attic with unsafe access or step between supported walking surfaces.

A sagging or bulging ceiling can be hazardous. Keep people away from the area; avoid disturbing it or touching wet electrical fixtures. Seek appropriate urgent help rather than attempting a roof inspection yourself.

Look beyond the shingles

From the ground, inspect visible roof edges and penetrations for displaced materials. Flashing, wall intersections and valleys can admit water even when most shingles look normal. A gutter problem can also direct water behind fascia or siding.

Inside the attic, a professional may trace staining along decking and framing. Water's path can be indirect. Condensation from ventilation or air-leakage issues should be considered instead of assuming the stain proves a failed shingle.

Prepare useful information for your roofer

Share photos, weather conditions, the first date noticed and any previous repairs. Ask for documentation of the suspected cause and whether protective work is temporary or permanent. After a repair, monitor the same area during subsequent rain; old stains alone do not establish that a leak continues.

• Record new staining and timing.
• Stay off the roof.
• Keep clear of unsafe ceilings and wiring.
• Ask for the diagnosis and repair scope in writing.