Closed cell foam question
I've read quite a bit on GW about closed cell spray foam being too expensive but after receiving quotes I'm in the air. I'll be building 2600 sq. ft. Plus 1300 unfinished basement in NE Kansas with 2x4 construction as recommended by our designer. Here are the numbers:
$6500 for blown in fiberglass at r15 and r50 in the attic
$10500 for closed cell spray at r20 in walls and r50 in attic
Both quotes include "delux foam and caulk package"
If I add foam to the exterior I'm adding $1-1.5k in sheathing plus some labor, needing to do additional air sealing, and also extending my window and door jambs that will add some cost. To me the price difference is close enough that the it seems much simpler to just do the closed cell and eliminate several additional variables in the process. The savings from downsizing my hvac is basically lost by adding the ERV. Kansas seems to be more of a heating climate these days if that's worth anything :)
Either way I do like the idea of a tight house with controlled ventilation. We will be all electric but I haven't called the electric company to ask about any discounts.
What do you guys think?