Insulating I-joist cathedral ceiling with Roxul
I have decided to use Roxul to insulate my cathedral ceiling constructed of I-joists on 24" centers.
The Roxul should be encapsulated on all sides.
I will be leaving a ventilation cap at the top of the I-joists, utilizing the flange as the spacer.
I was planning on using the steel stud version because it is 24.25" wide.
I first thought of using 1" XPS as the air sealing, cut to fit between the webs, caulked and taped.
I was wondering if using something like Tyvek sealed and stapled to the underside of the flange instead of the XPS?
It would be continuous, vapour permeable, and yet provide the air sealing.
Posted Jun 28, 2014 10:29 PM ET
Edited Jun 30, 2014 8:35 AM ET
Other Questions in Green building techniques