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We are putting a new metal roof over our existing shingled roof and our new addition. The new part is 1 and 1/4" lower than the existing shingled roof. Can we put 1" styrofoam and 1/4" plywood over before the metal roof goes on, or is something else better?
9/5/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23532/find/You would need to make sure it is acceptable to your metal roofing producer. However, I would not use styrofoam as it is too spongy. I'd suggest poly iso board.
Isaiah Industries, Inc.
9/5/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23534/find/Agreed to Todd's recommendation. Make sure whatever foam you use has the right compression strength for roof application.
An informed customer is the Best Customer!
9/6/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23544/find/Thank you for the help. I'll look into a poly iso board.
9/12/2018
Or copy this URL: https://www.metalroofing.com/spirit/comment/23580/find/