michael
02-22-2011, 06:31 PM
I want put 1" xps on floor than 5/8" or 3/4" T&G OSB. Walls will be 2" XPS all seams taped with tyvek tape including floor/wall and gaps filled with spray foam. 2"x4" studs framed against XPS no space and filled with unfaced fiberglass insulation and finished with 1/2" drywall.
1.Must the OSB be Pressure treated or AdvanTech or can I use regular T&G OSB?
2.Should the floor be installed first than the walls?
3.Does the bottom plate need to be P.T. when installed on XPS?
4.Do I need a thermal/capillary break between the bottom plate when installed on top of the XPS? If so Suggestions.
5.Can I install the wall first on top of a ripped length of XPS say 6" wide then tape seams when I do the floor?
6. The side wall will need supports about every 3' from the sill plate to the joist for the top plate. Will those supports need to be pressure treated as they will sit on the foundation wall? gasket needed under plate?
7. After filling the rim joist with 2" XPS and sealing seams can I fill the rest of the cavity with unfaced insulation?
Thanks for your thoughts,
Michael
1.Must the OSB be Pressure treated or AdvanTech or can I use regular T&G OSB?
2.Should the floor be installed first than the walls?
3.Does the bottom plate need to be P.T. when installed on XPS?
4.Do I need a thermal/capillary break between the bottom plate when installed on top of the XPS? If so Suggestions.
5.Can I install the wall first on top of a ripped length of XPS say 6" wide then tape seams when I do the floor?
6. The side wall will need supports about every 3' from the sill plate to the joist for the top plate. Will those supports need to be pressure treated as they will sit on the foundation wall? gasket needed under plate?
7. After filling the rim joist with 2" XPS and sealing seams can I fill the rest of the cavity with unfaced insulation?
Thanks for your thoughts,
Michael