I’m in the middle of constructing a wood shop/building. I could not get the siding on this season so used a PPG deck stain with UV block on the exterior OSB. The interior is batt insulation and drywall. It is only heated as needed with a wood stove. During certain weather conditions – cold clear nights – there is frost on the exterior at the stud bays. What is happening and is it okay? Will this continue to happen to the siding on an unheated building?
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Replies
Couple questions
A couple quick questions:
1. Where are you located?
2. Do you have a vapor barrier under the drywall (poly or the like)?
frost oon the outside of walls
thanks! 1. Central Oregon - east side of the Cascades/dry side. 2. no vapor barrier
I'm guessing that this is plain old "frost" -- the same stuff that forms on the grass or leaves.