We just recently purchased a home that is 29years old that we noticed has a little bit of mildew/mold growing on the sheathing. An inspector told us that it's most likely due to poor ventilation and insulation.
We only have gable vents installed on each side of the roof and no soffit vents or ridge vents. We don't even have any room for soffit vents so that's not even an option of adding them.
We were considering just remediating the mold,then replacing the insulation that's contaminated and adding new batts and making sure there are no areas exposed that could get warm air from inside the house, then adding an attic fan with a thermostat and humistadt to one of the gable vents. Would this provide enough air flow?
hope someone can advise!!