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Fratt

06:29AM | 10/30/02
Member Since: 10/29/02
1 lifetime posts
Bvbasement
I have decided to pour a concrete slab at the back of my house to replace the interlock pavers in place now. These pavers have approximately 6-8" of limestone screening support below them that will remain. Installation of a poly plastic layer and 4" of rigid styrofoam will follow. Then installation of a hydronic radiant floor heating system inside of the 4-5" concrete slab. This entire slab is going to be converted into a 4 season solarium, thereby being heated all year. The concrete slab would have a turndown foundation of 10" minimum. I seek input of wether the slab would heave as a result of frost. I live just north of Buffalo, across the pond in Toronto, Canada.

GlennG

02:46PM | 10/30/02
Unless you turn down the edge of the slab to below your local frost line it is susceptible to heaving.

Glenn

joed

07:48AM | 11/08/02
Member Since: 09/17/02
524 lifetime posts
What are attempting would work if this was a stand alone builing as the entire slab would float as a unit. Since this is attached to a house you will need a 4 foot foundation. Consult the local building department. They will tell you what they require. They might even require a footing.
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