Metal Roofing Over Purlins
What is the proper roof assembly for a metal roof (such as Fabral Grandrib 3, http://www.fabral.com/residential.php#standingseam) which is screwed to 2x4 purlins 2' O.C., and covers a vented house attic in a cold climate? In particular I'm wondering if any sort of secondary moisture barrier, like felt paper, is needed between the metal and the purlins? I understand felt paper is recommended when metal roofing is applied over plywood or OSB.
Posted Mon, 05/09/2011 - 21:10
Other Questions in General questions
Best practices ideas for retrofitting existing PWF built in muskeg and best practices for foundations for new builds in muskeg (i.e. very wet !) and a severe cold climate