0 lb felt as underlayment?: "is 40 lb felt as an underlayment good enough for ..." - Guest User (7/28/2004) | Underlayment | Archive

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is 40 lb felt as an underlayment good enough for a custom bilt vertical seam roof or do i need to install another barrier that the metal will "slide" on for expansion and contraction, so. california use.		Guest User 7/28/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3567/find/
I strongly suggest either a slip sheet such as red rosin paper on top of the felt paper or else use one of the new synthetic underlayments which acts as both underlayment and slip sheet.		Guest User 7/28/2004	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/3568/find/