Yea I got that great stuff gun. they say it can sit for up to 30 days. But i've had mine sitting over a year and the foam inside is still good. I only did that because you can disassemble the gun. and I knew if it hardened I can just disassemble it clean it out and reuse it possibly. but turns out it never hardened in a year and 9 months so i just used it again. whoever engineered this gun is a life saver!
I was thinking about the same and putting roxul on top of it (both in the wall cavity). But Im not sure. Im afraid of possible moisture collection inside the wall because of this XPS. I live in climate zone 5 (upper part, actually almost zone 6). Do I have to worry and do I have to use vapour barrier/retarder in this case?
