The deep ground will naturally be warm all winter. It's just a matter of keeping the nasty cold air away from the pipes. I have a similar situation with the crawl space under my house. Lots of pipes. I normally like to let some fresh air circulate under there, but when it gets cold, I close it up. I got a cheap remote radio digital thermometer ($10) so I can watch the temperature underneath. Overall, insulation is your best friend. R-5 is a bit light. Stack it for R-15 or more.
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timeasmymeasure
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Date: 2009-01-22 07:57 pm (UTC)