10/12/2026
Most of us never look up into our attics. This one had a story to tell.
The roof in this local home wasnโt venting enough air. Warm, humid air from the living space drifted up, hit the cold roof sheathing, and condensed. Over time that moisture fed the dark growth in the top photo.
Our IICRC-certified crew set up containment, treated the sheathing, and had it cleaned up in two days. The bottom photo is the same attic afterward.
Cleaning is only half the fix. Correcting the ventilation is what keeps it from coming back.
With Colorado nights turning cold, itโs a good week to take a flashlight up there. Dark staining on the underside of the roof deck or frost on nail tips is worth a closer look. Save this for your next attic check, and call us anytime with questions: 720-719-0034