R-25 exterior rigid foam in Maryland, USA
I was given 50 sheets of 4x8 R-25 rigid foil faced foam that was left over from a commercial building project. I also have 35 sheets of 4x8 R-10 blue board. I live in Maryland just outside of Washington, DC. I plan to add an addition on to the house this summer. The existing house is all masonry with no insulation. I would like to use the 2" R-10 board to cover the existing brick section and them add cement siding and new windows,
How can I use the R-25 in the new addition? I would like to use it under the siding and on the roof but I am not sure if it is a good choice in my region. Can I leave the stub bays empty? Do I need house wrap, etc? Please point me in the right direction.
Posted Mon, 03/17/2014 - 07:10
Edited Tue, 03/18/2014 - 04:58
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