Proper basement insulation - interior and exterior?
I own a home built in 2007 that has 1" XPS insulation on the exterior of the basement walls below grade. Above grade there is no insulation on the exterior...about 6-8" of the foundation is exposed above grade. Basement walls are 9', poured concrete that used a textured brick form. The basement also has radiant heat in the concrete floor. It's just waiting for my to finish it!
I've studied the building sciences page, and unfortunately it doesn't show how to insulate the basement interior walls properly if there is minimal exterior insulation.
First off, do I need to insulate the above grade portion of the basement first? I'm thinking I would use 1" XPS that has a stucco like finish.
On the interior, I was thinking of somehow attaching 1" XPS to the concrete walls (that have the textured brick finish), then building a 9 foot tall 2x4 stud wall with unfaced batt insulation. Would this cause any condensation problems? Is it overkill? I wouldn't mind making the walls as thin as possible, but I want it built right.
Basement has remained very dry since we moved in 2+ years ago. Though our house seems to be very "tight" as I had to have a HRV installed due to high humidity in winter/condensation on windows...the HRV solved that problem.
Posted Fri, 01/17/2014 - 10:51
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