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warmwxrules · 01-20-16, 12:12 PM

So i insulated a north facing/exterior 2x4 wall with mineral wool this fall. No issues. I put drywall up, but it hasn't been mudded/taped yet. I noticed an air leak around an outlet switch so i pulled a piece off to see what the deal was. In the process i noticed frost on the clapboard (exterior sheathing)..not a horrible amt, but enough to make the wool freeze to the sheathing. The sheathing is covered by tar paper and the siding. Should be worried? I checked the next 2 bays and the same thing so its not just the one bay with the leaky outlet. Is it because the wall isn't completely finished (moisture seeping through the joints?...

It has been 0F'ish or lower for the past 3 to 4 days...so very cold.

Dealing with moisture in winter sucks. My house is very dry. The basement was showing like mid 30% humidity the other day. We run bathroom vents.

01-20-16, 12:12 PM	#1
warmwxrules Helper EcoRenovator Join Date: Nov 2011 Location: La Crosse, WI Posts: 78 Thanks: 0 Thanked 3 Times in 3 Posts	frost inside wall So i insulated a north facing/exterior 2x4 wall with mineral wool this fall. No issues. I put drywall up, but it hasn't been mudded/taped yet. I noticed an air leak around an outlet switch so i pulled a piece off to see what the deal was. In the process i noticed frost on the clapboard (exterior sheathing)..not a horrible amt, but enough to make the wool freeze to the sheathing. The sheathing is covered by tar paper and the siding. Should be worried? I checked the next 2 bays and the same thing so its not just the one bay with the leaky outlet. Is it because the wall isn't completely finished (moisture seeping through the joints?... It has been 0F'ish or lower for the past 3 to 4 days...so very cold. Dealing with moisture in winter sucks. My house is very dry. The basement was showing like mid 30% humidity the other day. We run bathroom vents.