Performed inspection August 15 of this year. No issues found, no moisture, sheathing looked good. About 10 inches blown in cellulose insulation, insulation baffles in place.
The client called yesterday, freaking out because it’s “literally raining in my attic”. He’s not blaming me, but wants me to come by and give a professional opinion. I visited the house tonight.
Yep, the attic sheathing is saturated, water is dripping off the nails. It’s OSB, it’s wet, and some is turning black. This is on the North side only. Doesn’t seem to affect the south side, or the two end sides (house faces south).
Only thing I can think of is the baffles may be stopped up, or there is too much infiltration of warm air from house to attic (from can lights, attic access, etc.) The warm air hits the underside of the roof (the OSB), which is cold, and condensates.
I’m trying to give him ways to reduce this moisture. I can’t figure out why this didn’t show up at inspection, no blackened sheathing or indications of moisture problems. House was built in 2008
Any suggestions on what this freaked out homeowner can do?