Why am getting so much condensation in my cathedral ceilings? And will it stop?
I am building a home in northern Vermont and just finished the skim coat plaster on the walls and ceilings about 2 weeks ago. Since the plaster has been done I noticed water spots in arbitrary locations but mostly where the walls and ceilings meet and mostly on the south side of the house. I have 2x12 rafters, horizontal 2x4 strapping across the top and just under the plywood sheathing. Then I installed 1x3 strapping in between each rafter from top of wall to the ridge for ventilation. To this I installed 1-1/2" poly ISO (Atlas energy shield), then a layer of 5-1/2" and 3-1/2" roxul for an R-value of 48.5, VT energy code is 49.
I pulled down some Sheetrock and the roxul at a wet spot and the bottom of the rigid was very wet. After they plastered the house was loaded with moisture.
Do you think it just reminants or do I have a more serious problem?
CW in VT
Posted Mar 19, 2017 4:40 PM ET
Edited Mar 20, 2017 8:52 AM ET
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