attic is 400 sq ft.there are 4 round 6'' Vents in soffit,and 2 roof vents-12"x12".Rock wool,blown in,R/30 NO VAPOR BARRIER.Why the mold?no gable or ridge vent either.How do i fix this?There are baffles in attic,rafters are not blocked.
is your HVAV unit in the attic?Is the moisture coming from it? Also-ridge vents help allow proper ventilation.
Are your bathroom exhaust fans blowing straight into the attic, maybe? Or your dryer vent?
You still don't have enough attic ventilation. Definitely need more soffit vents. Roof mounted turbine vents that turn in the wind help suck more air through the attic. This coupled with at least one gable end vent should stop further mold. Removing old mold is a hassle, but can be done using diluted bleach in a lawn pump sprayer. A respirator will be needed to ensure you can breathe while applying the bleach solution.
