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-   -   Basement insulation (http://www.diychatroom.com/f103/basement-insulation-164698/)

mazzonetv 11-25-2012 09:10 PM

Basement insulation
 
Unfortunately hurricane Sandy forced me into a complete basement remodel. My basement has a poured concrete foundation which I would like to spray with Ames Blue Max while I have everything exposed. After applying the blue max (which forms a vapor barrier), what kind of insulation would everyone suggest? Should I use a rigid foam? The basement usually stays dry, the only way I got water in was because my Whole neighborhood flooded and our sewers backed up.

Thank you in advance

NiNe O 11-25-2012 09:12 PM

is your basement underground?

mazzonetv 11-26-2012 06:07 AM

Yes - 8' ceilings and about 6' is underground.

NiNe O 11-26-2012 06:41 AM

Seems like earth is a pretty good insulation

Gary in WA 11-26-2012 09:35 PM

Is the waterproofing mainly for peace of mind, another future similar incident? I'd spend the money on foamboard rather than a vapor barrier. Foam board, thick enough to prevent condensation is suggested by BSC: http://www.buildingscience.com/docum...lation-systems

If near New Brunswick, NJ, your average annual low temps are 46* above grade. Without any f.b, just R-13 cavity in a wood frame wall, at 70* you'd be good to 46%RH. R-5 (1"f.b.) =good to 55%RH, 2" (R-10)= 60%RH.

Have you figured your heat loss/savings yet: http://www.quadlock.com/technical_li...Insulation.pdf

Page 69, and find your wall make-up: http://www.buildingscience.com/docum...study-analysis

Gary


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