metal roof ?
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Senior User
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metal roof ?
This fall we built a 24x26 ft garage and put a white 5 vee metal roof on it. Every thing was fine till this month when it started to sweat. We don't have any heat in it.Has anyone else had this problem?
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Joined: Jan 2005
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From: Huntington Indiana
Sounds like the end vents and soffits are not giving enough ventilation. Must be the winds are from the sides and so you have dead air. Probably need to put in vents in the peak of the roof (probably 2 will do).
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From: Klamath Falls
I have found that the material supplier or manufacturer will usually give you the best advice for a problem like you're having. They have a vested interest in the longevity of their product and are very likely to be genuinely interested in your problem. The internet makes it easy to reach almost anyone.
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From: Klamath Falls
P.S.
bigredtruckmi is on the right track. I did a re-roof last year and spent a little time researching. It seems the industry has reached consensus and the gable vents that we've been doing forever are obsolete. Ridge venting is preferred and there is a formula that considers sq. ft. and length of ridge. When you look at the new information from the roofing industry, it sure makes sense.
bigredtruckmi is on the right track. I did a re-roof last year and spent a little time researching. It seems the industry has reached consensus and the gable vents that we've been doing forever are obsolete. Ridge venting is preferred and there is a formula that considers sq. ft. and length of ridge. When you look at the new information from the roofing industry, it sure makes sense.
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if you have a warm humid inside and cold outside, where the two meet you will have condinsation(can't spell). A couple of ceiling fans might help also
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From: Southern New England
CBall. I think that's your problem (not having sheathing). Recently I installed a standing seam roof on an addition to my garage and was ready to install the roof just on the purlins. When I did some research, I discovered that the manufacturer recommended installing sheathing with 30 pound felt if the space will be heated or enclosed.
You may want to install rigid insulation such as blue Dow board (1" or 2" foam) between the rafters from underneath. Tack some firring strips to the rafters to keep the foam from falling. That should help the warm air from coming in contact with the cold steel and condensating.
You may want to install rigid insulation such as blue Dow board (1" or 2" foam) between the rafters from underneath. Tack some firring strips to the rafters to keep the foam from falling. That should help the warm air from coming in contact with the cold steel and condensating.
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you might find a local to spray it also, sprayed in place polyurethane foam it goes on as a liquid and expands about 30 times, seals any nail or screw holes and stops any air leaks, but for the do it yourselfer the best bet would ridgid board, the highest R-factor you can afford
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Joined: Jun 2004
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From: Northern MD
I checked out the spray insulation and almost died from the cost. To insulate my 42x60x14 garage, the insulator wanted $15,000! To insulate it myself with R-19, including the cost of a scissors lift, cost me less than $2500. I would have rather had the spray in, but there was no way I could justify that price. I thought it would be cheap because the building was empty, and they could just roll right through it, saving a lot of time. Boy was I wrong!
