With a raised house how should I insulate underneath?
My house is raised off the ground about 5' and the current insulation is falling apart and was just firberglass batt insulation. I'm looking at wool batt insulation but my joists are 2x10. Is it ok to leave a space between in the cavity if i am using batt designed for 2x6 install? Additionally being that far off the ground is it still rocommended to lay poly on the ground? my house backs up to a canal leading to a river and there is no draiage issues. Thank you in advance.
I can’t speak to where you could find thicker sheep wool, but if you are talking about Rockwool Mineral wool insulation then you should be able to find it at 7.5 inches thick. And, how much insulation you need depends on what climate zone you are in.
If you are 5 feet off the ground and air flows freely underneath then I don’t think you’ll really need the 6-mil poly unless you close it in. What climate zone are you in (or nearest city), and are you keeping it open all around?
I live in southeast Louisiana about 50 miles north of New Orleans. I only have horizontal, cedar slats across the cinder block supports. Air flow is unrestricted as these slats are about and inch and a half spacing between each.
Apologies. I was looking at Rockwool for insulation.