Can I put rigid insulation under patio pavers, and should I have a permeable system right against the house?
I am considering replacing the patio outside my walk out basement of my 1959 house in northeast Ohio (zone 5). I would like to put rigid insulation under the new patio to help keep the uninsulated floor slab inside the house a little warmer, similar to a frost protected foundation. In a perfect world I would also like to have the new patio be permeable to minimize rain water runoff. However I ran across a publication from the state of Minnesota that recommends a minimum distance between a permeable pavement installation and a building foundation. So I have several questions:
-Is this a concern for small residential patios?
-Is there insulation available that would provide rainwater permeability as well as thermal protection?
-If I don’t try to have a permeable installation, could I use standard rigid insulation under pavers, or would a concrete patio be better with rigid insulation?
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