Half insulating a stone basement?
It’s been a long road and we are almost ready to move in to our project. I tackled the two part plaster myself with nice results but now it’s getting cold. My basement is typical fieldstone 1880 style and the house is in Zone 6b. The foundation is about 4′ underground and 2′ exposed with a 10×10″ fir sill plate beam. I have read the building science articles about completely modifying the basement but that’s not in the cards and is another massively expensive project I cannot tackle at the moment. My other plan on getting the basement a bit more under control to increase the efficiency of the home is to insulate the rock wall only in the above ground area and the sill plate areas. I was going to place an inch or so of xps against the rubble foundation (again, only in the above ground top 2′ of foundation) and run some 2×2’s vertically and stuff some batts over the top of the xps, then enclose the 2×2 studs with drywall. The sill area will be cut XPS and spray foam to seal the edges. In the future I could simply spray foam the lower parts of the foundation when budget affords.
My Question is: Is this feasible? What precautions should I look out for when installing this system? Thanks much
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