A reader's Roofs and roofing question: Shingle to metal roof?
Kyle V. from Kingston, Canada had this Shingle to metal roof question.
I am preparing to convert my roof from shingle to metal roof. What i am wondering is, does there need to be a sheathing on first of can i run it just on batton on the trusses? Or does it require OSB?
The normal layout for a metal roof is
trusses, battens, and an insulation foil or blanket, then the metal sheeting.
If there is sheeting already on that is in good condition then I don't see any reason to remove it though. Provided that the battens are screwed through the sheeting and into roof trusses. But still use insulation foil in between though.
There couple of issues maybe.
Your existing battens may be closer together than necessary, this is no problem really, except that they may be thinner than recommended.
The company supplying the metal roofing will have detail sheets for fixings, supports, etc.
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