exposed concrete foundation

Old 10-12-14, 04:40 AM
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Location: owego, new york
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exposed concrete foundation

I have a concrete foundation that is exposed to the northeastern weather. It is exposed anywhere from 1 foot to about 4 foot. I was considering digging down below the frost line and installing some hard foam/Styrofoam to the foundation. Most of the interior walls are insulated.
Would this be a good idea?
How does the foam get fastened?
Is there a paintable foam?
Thank you and if you have any wisdom to add to this installation it would be appreciated
Old 10-12-14, 05:06 AM
Join Date: Oct 2008
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Here's a link to get you started: BSD-103: Understanding Basements — Building Science Information

When you install rigid insulation above grade it needs to be protected from damage. I elected to put mine on the inside to avoid the insects tunneling through and detail work on the outside. If your current walls are flush with your foundation you will need to flash over the rigid and slope it to drain water away.

If the walls are well insulated on the inside the benefits will be less. Were the joists at the rim (basement ceiling) air sealed and insulated? That is the outside band that sits on top of the foundation.


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