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Exeric · 11-01-12, 06:57 PM

Well, I'll explain myself here while waiting for the subject to get split. It is standard construction, sheathing attached to 2x4s. Maybe I didn't explain myself well. Also i'm not seeing where I have two vapor barriers. The house wrap is standard tyvek air barrier. The xps has low to moderate vapor permeability. So even that doesn't act like foil backed iso.
We generally don't use vapor barriers in Cali because we don't need them here.

Also, to answer your other question. I just installed new windows and doors within the existing structure and matched to the existing siding, and the interior walls are stripped to 2x4 studs. So it is much more practical at this point to install the xps on the interior side.

Do you have any ideas on the questions I asked you?

11-01-12, 06:57 PM	#5
Exeric Apprentice EcoRenovator Join Date: Aug 2012 Location: California Posts: 274 Thanks: 19 Thanked 37 Times in 28 Posts	Well, I'll explain myself here while waiting for the subject to get split. It is standard construction, sheathing attached to 2x4s. Maybe I didn't explain myself well. Also i'm not seeing where I have two vapor barriers. The house wrap is standard tyvek air barrier. The xps has low to moderate vapor permeability. So even that doesn't act like foil backed iso. We generally don't use vapor barriers in Cali because we don't need them here. Also, to answer your other question. I just installed new windows and doors within the existing structure and matched to the existing siding, and the interior walls are stripped to 2x4 studs. So it is much more practical at this point to install the xps on the interior side. Do you have any ideas on the questions I asked you? Last edited by Exeric; 11-01-12 at 07:05 PM..