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Old 06-13-2012, 11:23 PM   #1
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attic condensation


My house has two roofs, one the original flat roof and the new pitched roof construction on top of the old one.

Some condensation forms in the old roof and comes out the sides of the building staining the exterior walls.

I will be adding vapor barrier to the ceilings when I do some remodeling. But I will not be remodeling the whole house.

Do I need to drill wholes in the old roof to allow vapor to escape up through the new roof insulation?

rodmccoy is offline   Reply With Quote
Old 06-14-2012, 12:09 AM   #2
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Location: Fairbanks, AK
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attic condensation


Rod: A vapor barrier may kill the roof by trapping moisture. VB's are not used much anymore. First, where are you? Second, more details will be helpful. Why is the water condensing on the old roof? Why is it so cold? Any ventilation over it? How are the roofs connected, if they are? Any insulation in either roof? Etc. Pics are always great, too.

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