Another drywall question.
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Another drywall question.
I have a guest room on our garage. It's about 15x18, bath, "kitchenette", closet. It has an open, vaulted ceiling. It is insulated, but was not heated or cooled most the time during the last year or so. The drywall at the very peak crumbled and shows signs of moisture and a little mold. I figure my problem was condensation, as during the recent rain, no moisture. My secondary concern is the corner metal used. I can understand the drywall going to pot, but the corner metal is rusted like it sat in salt water for 5 years. I see a little rust coming through in non-crumbled areas.
Isn't that stuff galvanized? Should it rust? If it rusts, how can you put drywall mud on it and not have a disaster?
I'm going to get this fixed, but want to make sure I don't have a bigger problem with all the corner metal.
Thanks.
Isn't that stuff galvanized? Should it rust? If it rusts, how can you put drywall mud on it and not have a disaster?
I'm going to get this fixed, but want to make sure I don't have a bigger problem with all the corner metal.
Thanks.
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How long ago was this dry wall installed? There is a huge problem with drywall made in China. Corner bead can rust if left to stay wet long enough. I would double check the roof in the area where you are having these issues. You might have a small leak somewhere as well.
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Drywall was done about 18-24 months ago. I'm going to give the roof another look/sprinkler test. I have drywall (same stuff) in the car part of the garage for the fire barrier. No problems there, but that doesn't get closed up like the guest room.
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Joined: Mar 2003
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From: northern Michigan
Sounds to me like you have a ventilation issue. Air flow between the roof and the insulation prevents mositure buildup that will cause condensation. The most effective means of controlling this is with the combination of a ridge vent that runs the leanght of the roof peak and soffit vents on both sides of the roof overhang and make sure nothing is blocking this area. It is not uncommon for those that don't know better to try and seal that area with insulation. If this don't fix it a powered gable end vent should, but in 99% of the cases passive ventilation is all that is needed.
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