25 Roof Leak Warning Signs (With Photos) — When to Call a Roofer for Repair

Moment #3: Damp attic insulation patch

Wet insulation loses most of its thermal performance and keeps moisture in place longer. A damp patch in the attic often points to a roof penetration issue above it—vent boots, nails, underlayment seams, or small decking gaps. Check for moisture patterns directly above the insulation and on nearby wood. Catching this early can prevent staining in living areas and rot in roof framing.