Roof Flashing Pulling Away
Address within 1–2 weeks to prevent further damage
Flashing pulling away from your roof? This exposes joints to water. Learn repair options ($150–$800), when to DIY vs. hire a pro, and warning signs. Estimated repair cost: $150–$800. For a precise estimate based on your actual roof, get a free satellite quote at RoofVista.
Likely Causes
Thermal expansion and contraction over seasons loosens the seal between flashing and surface
Dried-out or cracked roof cement/sealant no longer holds the flashing in place
Rusted or corroded flashing (galvanized steel) loses structural integrity
Building settlement shifts the roof structure relative to walls and chimneys
Improper original installation — flashing not properly embedded under shingles
How to Diagnose This Problem
- 1
Visually inspect flashing at roof-to-wall joints, chimneys, vents, and valleys from the ground
- 2
Look for gaps between flashing and the surface it's sealing — even a 1/8" gap allows water entry
- 3
Check for rust streaks running down from flashing — indicates corroding metal
- 4
In the attic, look for water stains near any flashing penetration point
- 5
Check if the sealant/caulk around flashing is cracked, dried, or missing
Estimated Repair Cost
$150 – $800
Typical repair range (varies by location and severity)
When to Replace Instead of Repair
Flashing repair is usually sufficient. However, if flashing is pulling away in multiple locations and the roof is 15+ years old, replace all flashing during a full re-roof rather than patching individual spots.
Materials Affected
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