Winterizing a stone summer cottage
I own a 90 year-old stone summer cottage in the Pocono Mountains in NE Pennsylvania. I intend to gut it to the stone shell, and completely renovate it as our primary year-round residence.
The cottage currently has a dirt crawl space and the foundation depth is unknown, but the bulding has been stable for 90 years now, with no significant cracking. The stone perimeter walls are approximately 24″ thick and my plan is to dig out the crawl space a bit, pour an insulated ‘rat slab’. I plan is to expose some of the stone walls on the outside, frame out and spray foam the inside; and in some areas expose the inside stone surface and foam and ‘side’ the outside.
I intend to make the house as energy efficient as I can, within reason; my dream would be heating through a water source or ground coupled heat pump, that feeds radiant floors, with some wood supplimenting.
My major concerns are:
1. Will the stone walls wick moisture significantly and do I need to be concerned where the inside stone surface is exposed?
2. I plan to install a ‘radon fan’ under the ‘rat slab’ and piped above the eave line, but should I be concerned with radon seeping in, through the exposed interior stone?
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