27 Mar '13, 7am

Green Building Q&A: What could cause condensation inside my exterior walls?

I just started a bathroom remodeling project. When my contractor removed the tile off the walls in the shower and around the windows, the insulation was wet. Condensation seems to be the cause. The question is, how do I eliminate the condensation problem before re-tiling my bathroom? I got new siding three years ago and Tyvek was installed under my new vinyl siding. The Tyvek appears to be installed on top of the plywood without any additional insulation. My contractor feels that there should be additional insulation so the temperature changes of Chicago winters will be minimized on the wall. My siding installer said that is not necessary. As my contractor is working on removing existing tile, I am trying to decide what to do. The past two days, the wall and insulation dry out, but at night when the temperature drops, I can feel the wetness behind the interior insulation. ...

Full article: http://www.greenbuildingadvisor.com/community/forum/gener...

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