1x4 covered by plywood to cut down on rippling

Guest User
Having metal roof over shingles...1x4 are laid..would plywood help eliminate excessive gas-canning( as roof is quite wavy)? Thank-you
Allan Reid
Dura-Loc Roofing Systems, Inc.
Depends on style and gage of product. In the lighter low profile it will help a little but not in the heavier gages.
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