Austin ranch house insulation
I was able to convince my house design team to review the sizing of the HVAC equipment needed for the project. I now need to finalize the insulation parameters which I would like to use. I was hoping to get some input on this area from the experts on the forum. Here is what I am thinking about going with, please suggest changes if you think differently.
Roof – 1.5″ polyiso on top, 8.5″ open cell foam underneath roof deck
Walls – 5.5″ open cell foam in wall cavity (I considered cellulose but I am not sure about my contractors experience in doing this well), XPS foam on outside. I am not sure about the optimal thickness, I am considering 2″ but is this excessive?
Floor – 2.5″ XPS underneath
I am pretty certain that my architect and mechanical engineer think that I am crazy for wanting this extent of insulation, they do not feel there is a payoff in our climate zone. Am I? Please chime in on specific recommendations/changes for the 3 components.
Thank you, as always.
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