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To: Kirk © who wrote (43265)1/7/2013 10:58:43 AM
From: robert b furman  Respond to of 219281
 
Yes,

Really takes a deep huge trench in Wisconsin - frost goes down 48 inches.

Really only works with new buildings.

I have an old school house built in 1860 and the basement was dug in 1930.

Am using warmboard which is passive solar retro approach when floor is needed.

warmboard.com

altestore.com

This stuff has really come down in price.

I have a flat roof with ideal southern exposure.

Next years project.

Bob