1x4 covered by plywood to cut down on rippling | Ask The Experts Forum

Guest User 8/22/2006	Having metal roof over shingles...1x4 are laid..would plywood help eliminate excessive gas-canning( as roof is quite wavy)? Thank-you	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/8524/find/
Allan Reid Dura-Loc Roofing Systems, Inc. 8/23/2006	Depends on style and gage of product. In the lighter low profile it will help a little but not in the heavier gages.	Share Or copy this URL: https://www.metalroofing.com/spirit/comment/8525/find/

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