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Gable roof over flat roof

Posted by Walter on May 17th, 1998 07:42 PM

I have a small single-story house with a flat tar roof, and I want to convert to a gable roof with standing seam, steep pitch (probably 8/12) for some living space upstairs.

Can I avoid tearing off the existing roof, and probably the decking, by putting down 2x4 flat 'sleeper" running perpendicular to the 2x12 joists, then install the 2nd floor deck on top of the 2x4's? In other words, put in a partical 2nd floor without removing the existing roof material. Any advice would be appreciated.

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