I AM RECEIVING CONFLICTING INFORMATION ON THE EFFECTIVENESS OF WHITE POLY/THIN FOAM/BLACK POLY OR FOIL/BUBBLE BUBBLE/WHITE POLY UNDER CONCRETE SLAB INSULATION FOR RADIANT HEAT. ARE THESE AN ACCEPTABLE SUSTITUE OR SHOULD I GO WITH 2″ OF EXTRUDED POLYSTRENE.
THANK YOU
Replies
didn't you just yell at us in another thread???
delete one or the other and that way you can have focused replies instaed of scattered....
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming
WOW!!! What a Ride!
Forget the primal scream, just ROAR!!!
you must be the new guy with the caps lock button stuck in the on position...
2" extruded is the way to go...
Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming
WOW!!! What a Ride!
Forget the primal scream, just ROAR!!!
The bubble wrap is not effective in that application, regardless of what the salesman tells you. Go with 2" extruded, and run at least 1" around the perimeter of the slab as a thermal break.
If it will be radiant heat, check out 'Heatcrete'.
Absolutely do not use "Insultarp' or other similar bubble foil insulations under your slab. Use R-10 minimum XPS. Dow's Foamular 250 is a good choice unless you are going to park your collection of army surplus tanks and troop carriers on the slab, in which case you would upgrade to maybe the 1000.