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https://www.metalroofing.com/spirit/comment/8612/find/
Strap the roof vertically over the rafters with a minimum 1" board and then select a metal roof system that installes on horizontal strapping. Ventilate the air space then at both eaves and ridge. Also choose a light colour or an Energy Star colour to reflect the heat.
This will reduce the heat transfer by over 70%.
9/7/2006
Dura-Loc Roofing Systems, Inc.
9/8/2006