I’ve got a 30′ x 40′ shop/garage in central NC with 2 x 10 walls (ICF knee wall foundation needed them to be that deep due to the cantilever over the outside insulation) The original plan was to blow in dense pack cellulose but due to a job transfer I am putting the property up for sale. Since the cellulose is slow and dusty and I don’t want to mess with it I am going to install FG batts. An R-19 (or maybe R-25) batt will not fill the 9.5″ cavity so should I put the batt into the cavity against the outside wall and staple the kraft flange to the inside of the studs OR put the batt flush with the inside wall and staple to the face?
Thanks.
Steve.
Replies
Why are you using batts that don't fill the entire void?
J. D. Reynolds
Home Improvements
Because it is cheaper and assuming I put the batt against the outside wall (which seems the way to go) will allow the new owners a space to run wiring for whatever they might want to put in the walls. The two insulation contractors I talked to a year ago both were going to use R-19.The outside walls are Hardipanel.Steve.
I'm not sure why an insulation contractor would suggest 5 1/2" batt insulation for use in a 9 1/2" deep cavity.
"Cheaper" is rarely the proper route.
I'd recomend an R30 9 1/2" batt insulation.
If this project is going to be inspected by either a building or home inspector, the 5 1/2" batts will not likely pass.....whether you put them to the interior or exterior.
J. D. Reynolds
Home Improvements
what kind of sheathing/siding do you have?