sub slab water line insulation?
Hi. I am in zone 4a and building a post frame house/shop.
I want hot water to arrive quickly to fixtures, so I was leaning toward a hot water loop using a circulation pump.
Since the hot water loop will be under the slab and under the 2″ of recycled XPS, how do I effectively and economically insulate the water lines
so I am not paying to heat the earth?
Thus far, I have seen 6ft lengths of foam at the big box stores, but they do not appear very impressive for this strategy.
I am planning to use PEX for all water supply lines.
Thank you for your advice.
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