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Condensation?

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Ernie Gladstone
5/11/2007
I installed a metal roof on 2x4 strapping (with tar paper between) 10 years ago. The strapping is nailed directly to roof rafters (no plywood between). This past winter, i noticed water (frozen) on the insulation between the rafters. I believe it is a result of the metal roof condensating on the north side and water is somehow making through the tar paper which has sagged between the strapping. I am considering lifting the roofing, laying plywood over the strapping, and then replacing the tar paper before putting the roof back down to rectify this problem. I am curious to know if anyone else has experienced this problem (condensation) or has simpler (and cheaper)suggestions on how to fix my problem.
Todd Miller
Isaiah Industries, Inc.
5/11/2007
Ernie, you may have several options here. One option might be to increase attic ventilation. That could resolve things. Your idea is also an option. Talk to an experience insulation contractor but spraying icynene insulation on the attic ceiling may also be an option. Hope this helps.
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