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Monolithic slab in a cold climate

I've been talking to an excavator who says that he has done quite a few monolithic slabs up here in Vermont, including one for his own home. I'm wondering if anyone else has used a monolithic slab in a cold climate and if so, how did they do it? I'm thinking that 4" of foam insulation under the slab and another 4" around the slab would work, but I wonder how far out it should go. I also wonder about what kind of vertical insulation to use around the slab perimeter. Any advice?

Asked by William Ritke-Jones
Posted Apr 5, 2012 5:58 PM ET
Edited Apr 6, 2012 6:22 AM ET


7 Answers

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Yes, you can install a frost-protected shallow foundation in a cold climate.

Here's a link to an article with more information: Frost-Protected Shallow Foundations.

Answered by Martin Holladay, GBA Advisor
Posted Apr 6, 2012 7:34 AM ET



Answered by William Ritke-Jones
Posted Apr 6, 2012 11:08 AM ET


You can also go to http://cchrc.org/ and read their information on FPSF's. Do a search of "frost protected shallow foundations."

Answered by John Klingel
Posted Apr 7, 2012 2:22 AM ET


Alan Gibson wrote a good piece on his techniques in the April 2010 JLC. http://www.jlconline.com/cgi-bin/jlconline.storefront/4f80c30e091c174427...

Answered by Dan Kolbert
Posted Apr 7, 2012 5:56 PM ET


thanks for the resources!

Answered by William Ritke-Jones
Posted Apr 9, 2012 11:13 AM ET


Frost-proctected shallow foundations are pretty much standard when building a house here in sweden. Here is an example of a type of foundation called supergrund: http://www.aerobord.ie/images/stories/multimedia/Supergrund_flyer_Newsty.... this on have a U value of 0.11 w/mk2 down to as low as 0.07 w/mk2.

Answered by tommy hakomaki
Posted Apr 16, 2012 11:20 AM ET


Tommy H: Very nice. For those of us wanting an edge beam, these would work real well. Does anyone know if these are available in the States? At one time, a builder here was tinkering w/ the idea of having these made here, but then changed his slab design.

Answered by John Klingel
Posted Apr 16, 2012 2:42 PM ET

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