Roof Leak: How to Find and Temporarily Fix It

Step-by-Step Fix

1. 1

   Trace the leak from inside

   In the attic during or after rain, look for wet insulation, water trails on rafters, or daylight coming through. Mark or photograph where you see water entering. Leaks typically enter at penetrations: chimneys, vents, skylights, and valleys — not usually in the middle of a field of shingles.

2. 2

   Inspect from the roof

   On a dry day with a stable ladder, inspect the area above the interior leak. Look for cracked or missing shingles, damaged flashing (the metal strips around chimneys and vents), or lifted shingle edges. Flashing is the most common leak source.

3. 3

   Make a temporary patch

   For a small area of damaged shingles: apply roofing cement under the lifted or cracked shingle, press it down, and apply a thin layer on top. For missing shingles: slip a piece of sheet metal or a spare shingle under the course above and nail it in place. These are temporary measures only.

4. 4

   Apply roof tape as emergency cover

   If you can't identify the exact spot or need an immediate fix before a roofer comes, apply self-adhesive rubberized flashing tape (sold at hardware stores as 'roof repair tape') over the suspect area. This can hold for weeks.

5. 5

   Manage interior water damage

   Put buckets under active drips. If the ceiling is bulging with trapped water, carefully pierce it with a screwdriver to let it drain in a controlled way — otherwise the whole section can collapse.