What is the conservation of energy have to do with mold in the attic? Well, if you step back and examine how the house behaves as a whole system, they are often directly related.

Mold needs moisture to chronic form and thrive, so source of moisture must be present. Maybe the moisture came from outside. The roof is newer and a quick check of the roof shows no obvious damage or leaks.

Maybe the moisture coming from inside. During the heating season, inside the house often has high humidity, especially bathrooms and kitchens. A quick check shows that all bathroom fans, kitchen chimneys, etc. are properly ducted completely outdoors and not in the attic. The amount of insulation looks good and the attic is well ventilated.

Thanks to leaks! Air leaks can cause major source of energy loss in most houses and a common source of chronic moisture, mold loft. Most homeowners are aware of air leaks around windows and doors.

Look around in the attic and you can find major gaps in recessed lights and fans, holes where pipes or son mounted, large gaps in the chimney can be found. And do not forget the whole house fan and especially folding attic stair cover - a big hole in the ceiling that is often overlooked naked!

Sealing the leaks can stop a significant moisture source. And just think of all the energy you can save and the cold drafts you can stop!