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PostPosted: Fri Jun 29, 2007 9:32 am 
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Joined: Tue Sep 26, 2006 11:00 am
Posts: 44
Hi, here is a cut view of the new slab. The ground is sand (old river bed) so it wont moove during winter. I though about insulation underneat it so i have asked my old experienced father, he says not to put anything, just polythene barrier underneat. I have some concern at -30 deg. in winter it will be cold. I will have a heated floor though. Anyone have comments on this...

thanks !

Marc


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Marc Duchesne
Studio ConceptSon
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PostPosted: Fri Jun 29, 2007 1:21 pm 
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Joined: Wed Oct 08, 2003 1:48 am
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Location: Central Village CT
Marc Duchesne wrote:
Hi, here is a cut view of the new slab. The ground is sand (old river bed) so it wont moove during winter. I though about insulation underneat it so i have asked my old experienced father, he says not to put anything, just polythene barrier underneat. I have some concern at -30 deg. in winter it will be cold. I will have a heated floor though. Anyone have comments on this...

thanks !

Marc


Marc,

Your dad is mistaken sir......... it is even more important with a heated slab that the entire underside of the slab be insiulated to stop the earth from becoming a huge heatsink stealing heat and energy away form the place you need it most.

A minimum of 2" continuous T&G blue board is required - and in an ideal world this would also run down the inside of the foundation/grade beam) at least another couple of feet.........

I hope this helped

Rod

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PostPosted: Sat Jun 30, 2007 12:40 am 
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Joined: Tue Sep 26, 2006 11:00 am
Posts: 44
Hi Sir, thanks for your info. I will add 2 inches of insulation underneath.
I received your book last week and almost half way through reading. I learn a lot as I realised I did many mistakes when building my basement studio few years back. Thank you, this was exactly I was looking for.
Regards, Marc Duchesne


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