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I recently purchased a 1939 log home here in northern Colorado. I would like to add more insulation to the walls. The house is around 550 square feet with 5 inch thick walls and 13″ of loose cellulose insulation in the attic. The house also has a full basement. The insides if the walls have a vapor barrier of what appears to be asphalt impregnated kraft paper. On top of this is a grid work of 1/2 inch firring strips to which the “drywall” (actually some type of low density fiberboard) was attached (since removed). I want to add true drywall to the inside and insulate further against the -20F+ winters. Would 1/2″ Blueboard be a viable insulation for this purpose or would I run into a problem of moisture condensing behind the foam duting the winter? Also what could be a good, economical method to seal the subfloor (1X solid lumber nailed on a 45 degree angle to the floor joists, 1/8 gap between each board) against moisture and musty smells from the basement?
Sincerely,
Ed Colclasure
Replies
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I recently purchased a 1939 log home here in northern Colorado. I would like to add more insulation to the walls. The house is around 550 square feet with 5 inch thick walls and 13" of loose cellulose insulation in the attic. The house also has a full basement. The insides if the walls have a vapor barrier of what appears to be asphalt impregnated kraft paper. On top of this is a grid work of 1/2 inch firring strips to which the "drywall" (actually some type of low density fiberboard) was attached (since removed). I want to add true drywall to the inside and insulate further against the -20F+ winters. Would 1/2" Blueboard be a viable insulation for this purpose or would I run into a problem of moisture condensing behind the foam duting the winter? Also what could be a good, economical method to seal the subfloor (1X solid lumber nailed on a 45 degree angle to the floor joists, 1/8 gap between each board) against moisture and musty smells from the basement?
Sincerely,
Ed Colclasure