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Underslab insulation
Last Post 01 Nov 2008 04:47 AM by BadgerBoilerMN. 2 Replies.
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mmcompanyUser is Offline
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13 Oct 2008 07:36 PM
Installing radiant system in basement of new home. Is under slab insulation really needed when the slab is well below grade. The exterior walls are ICF's all the way down to the footings atleast 4' down?.  
medelpadconstUser is Offline
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31 Oct 2008 09:25 PM
I use a product called the Barrier under all of our below grade slabs. Think of it in terms as you are heating your basement to around 70 degrees and the ground temperature under the slab is at 54-46 degrees. The expensive BTUs you have provided to heat the 70 degree area are going to the slab which is at the cooler temperature to heat. That is how  thermodynamics work. Hot to cold. I have tried all different kinds of insulation and have found that the Barrier works and installs the best.

Bruce Westerlund
Medelpad Construction LLC
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01 Nov 2008 04:47 AM
Closed cell polystyrene is the standard. The blankets are cheap, fast and easy but lack the R-value sought by most designers. I avoid all insulation that will be compressed under a slab: this includes all bubble foils and blankets.
MA<br>www.badgerboilerservice.com
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