TOPIC: I Have An Existing Metal Roof and Have A Question
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We installed a metal roof using a reclaimed corrugated metal over a farmstand. This structure has no walls, so open on all 4 sides, supported with 2x8" rafters and 1x3" cross beams. We experienced heavy frost yesterday which created a lot of condensation on the underside, and therefore dripping everywhere. This is a shed roof, but we do have a pitch, although hit is not steep.
How can I prevent this dripping? Would an oscillating fan pointed at the metal roof help prevent the frost and therefore the condensation? Is the condensation due to the wood underneath being new and will stop after the wood dries out?
I have not experienced this before with metal roofs on other airy structures including new metal corrugation and standing seam metal -- all of which are exposed on the underneath as this one is.
Please help! Feeling desperate.
I am not sure of the exact dynamics of what has happened because, of course, this is not a typical metal roof installation. My guess is the metal panels dropped in temperature over night and warm moist air rising up from the ground then condensed on the cool surface. I do not think the wood structure has anything to do with what you have experienced. Keeping the air stirred up may help. You could also have the underside of the metal sprayed with closed cell foam which will probably also be a blessing in hot weather.
Thank you! Was hoping to keep the bottom side exposed so we can see the beautiful metal.
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