What are the fasteners for roof exterior rigid insulation (4.5 inches)?
I am looking to use a detail similar to 4-05055 - metal roof/unvented/cathedral/exterior 4.5" rigid insulation. I have a few questions on the assembly:
1- are the layers of rigid insulation adhered together?
2- what type of fasteners are being used to go thru the first layer of sheathing, thru 4.5" insulation, 2nd layer of sheathing and into rafters? spacing? (I am located in NY - 90 mph ground wind)
3- do you know a relative comparison between this detail and using a SIP panel - cost? installation? structural?
Posted Jul 23, 2014 9:11 AM ET
Edited Jul 23, 2014 10:33 AM ET
Other Questions in Green building techniques