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What type of decking is required under a metal roof? Does it have to be plywood or can it be a grid system of 1x4's between the trusses. Also, can an underlayment be added after the roof is already installed?
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Underlayment must be installed before the roof is.
The question of decking or not is determined by the particular product being installed and what its manufacturer calls for.
8/15/2006
Or copy this URL: https://www.metalroofing.com/spirit/comment/8504/find/Isaiah Industries, Inc.
8/15/2006
Or copy this URL: https://www.metalroofing.com/spirit/comment/8505/find/