Housewraps, cedar siding and moisture on interior of exterior wall
We built a Timberframe home in 2002. This past winter we noticed that we had moisture on the inside of our exterior sheeting. I have read many articles and have received a lot of opinions. However, depending on who I talk with, the answers are different. 1) We put cedar siding over Dow weathermate housewrap without a rainscreen. This seems to be the majority of the problem. 2) one solution was to remove the siding and put 1 1/2 rigid foam insulation, a rainscreen and then the siding. The idea here is to move the duepoint away from the walls. The problem I have with this idea is that our local code required a vapor barrier on the backside of our interior wall. And, it seems that without beeing able to completely remove this, it could cause problems. The second idea is to put tarpaper over the plywood and create a rainscreen for the air to dry out the siding. We live in climate zone 5 (just barely). We have cold winters but not as cold as others that are also listed in zone 5. My question is….since it seems that the worst moisture problems are on walls close to the kitchen, bathroom and laundry room…would this solution allow the interior moisture to escape and not build up? And, if we chose the foam board insulation solution, wouldn’t there be potential for moisture build up behind the insulation (since we are adding another barrier? We have install bathroom and laundry room fans with a greater cfm just to make sure that they are removing as much moisture as possible…..
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