If you would like to reply to this thread, please log in. If you do not have an Ask the Experts forum user account, create one here.
If you would like to reply to this thread, please log in. If you do not have an Ask the Experts forum user account, create one here.
We are building a hybrid steel home and I have not decided how to insulate the roof and was hoping for some feedback. We are building a 40x60 residence that will be T'd to a 30x60 garage. The residence building will be half attic and half cathedral open ceiling. I have read a lot about Zip System sheathing, tape and flashing and want to use this as the sheathing for both buildings. I am thinking that the section of residence with attic, we will insulate like a standard home with blown in and vent the space with soffit and ridge vents. But I am unsure about the cathedral roof/ceiling section. My purlins will be 2x8's for residence and 2x6's for garage and not steel. I am thinking that I would insulate the 7.5" cavity with either mineral wool or fiberglass. The garage building I am again thinking complete zip sheathing and then blanket insulation.
Please let me know if this makes sense of if there are best practices for insulating a steel roof, steel sided home? Again, our home will be a hybrid steel structure, the girts and purlins will be wood. The only steel will be the trusses themselves. Thanks for the help!
1/13/2022
Or copy this URL: https://www.metalroofing.com/spirit/comment/25783/find/Thank you. I am not sure where you are located but, especially in the cathedral area, I think having a vapor barrier behind the drywall would help prevent moisture migration into the insulation.
Additionally, check with your metal roof manufacturer to see whether they suggest a layer of mechanically fastened underlayment on top of the ZIP System sheathing. I believe that most manufacturers do.
Isaiah Industries, Inc.
1/14/2022
Or copy this URL: https://www.metalroofing.com/spirit/comment/25785/find/