How Do I Find Where My Roof Is Leaking?

During daylight, safely access your attic to look for obvious signs of water entry. Use a strong flashlight to spot dark stains on wood, damp insulation, or mold growth on rafters. Look for any pinpoints of daylight showing through the roof deck, as these can indicate holes or separations. Water often runs along rafters or sheathing before dripping, so the exact leak point may be several feet higher up the slope than the interior stain.

From the ground with binoculars or safely on a ladder, inspect the roof area above your interior clues. Look for damaged, curled, or missing shingles, especially after storms. Pay close attention to roof valleys, where two slopes meet, as they channel a lot of water. Also, examine the condition of sealant around any roof protrusions, as this is a frequent failure point.

• Missing, cracked, or buckling asphalt shingles or tiles.
• Damaged or corroated metal flashing around chimneys and walls.
• Cracked or deteriorated rubber boot seals around plumbing vents.
• Clogged or damaged gutters causing water to back up under shingles.
• Moss growth that can lift shingles and trap moisture.
• Deteriorated sealant in roof valleys or around skylights.

If the leak's origin is not obvious, the roof is steep or high, or you see widespread damage, it's time to call a professional roofer. They have the tools and experience for precise leak detection without risking your safety. A roofer can also assess if the leak has caused hidden structural or water damage inside your walls or attic that needs separate mitigation by water damage pros. Addressing both the roof breach and any interior water damage is crucial for a complete repair.