jblake122
New Member



What do you think these stains are? Cause for alarm, etc.?
Attached are some pics. These pictures really make the stains seem worse than they are.
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What can I do to reduce the humidity? And, what’s the likelihood of this developing into mold?They look like typical condensation stains (from the larger photo it looks like they track the ceiling joists). The solution will largely depend on where in the country you are, but assuming its NC the issue may be that in the winter you get frost in the attic due to poor air sealing. Alternatively if its humid in the attic and your living space is air conditioned that might be causing condensation to form. Nothing to really worry about at this point, just keep an eye out for mold and see what you can do to reduce the humidity in attic.
Assuming that its caused by excess humidity in the attic then as oldognewtrick was alluding to it may be a function of better ventilation. I don't know what is typical in your area, but if its just passive vents on the gable ends you may want a fan. Alternatively if its more a function of condensation caused by the warm air in the house touching the cooler surfaces in the attic (those joists become thermal bridges for the cold) it may be addressable with better insulation.What can I do to reduce the humidity? And, what’s the likelihood of this developing into mold?