Driftless SW Wisconsin | Here is the type of thing I am talking about. Radon reduction is another reason to have ventilation in a very tight new house, regardless of type of insulation. Ventilation is in the newer building codes in some places. Older houses leak enough so this is less of an issue. Newer tight houses it is an issue unless you are in a climate where you leave windows open. Jim
Edited by Jim 11/15/2012 13:34
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