This topic has been closed by the administrator. Comments are no longer accepted.
I am planning to put about 2 or 3 inches of rigid insulation over an existing compostion roof on a 25 yr old cathedral ceiling with inadequate insulation and no venting, then we will install a standing seam metal roof.
I gather from other comments here,that a 1 inch space from eave to ridge is now required under the roofing material (metal in this case)for venting purposes.
Where does the synthetic underlayment go if I vertical strap the insulation to hold it down into the decking, then add horiz 1/4's then the panels? Under the panel or under the strapping wood directly on top of the rigid insulation?
Dick
5/7/2007
Isaiah Industries, Inc.
5/12/2007