Mold needs 3 things to grow.
Attic fan mold.
Moisture food and warmth.
This can be easily addressed by increasing your ventilation via your bathroom fans.
Causes of mold while damp and warm climates are a prime breeding ground for our fuzzy friend other conditions that bring mold include lack of ventilation and proper sheathing.
No air sealing an attic will reduce the likelihood of moisture entering the attic.
Attic mold loves wet insulation.
High humidity in a space like an attic can lead to mold and a spill in a carpeted area of your home that isn t quickly taken care of can also lead to mold under the carpet.
Mold located on ductwork on roof decking trusses or just about anywhere in the attic is simply a problem of excessive moisture.
The only potential downside of air sealing is the increased humidity inside the home.
This is why mold resistant insulationis so important in an attic.
This dramatically lowers the odds of mold growth.
If you eliminate just one of these elements mold will starve and die.
Dryer vents plumbing vents kitchen or bathroom fans vented into the attic.
If you find black spots in your attic and you are thinking it could be harmful black mold you do not necessarily need to panic.
Causes of mold in your attic.
Related to 3 above this practice can pump warm moist air into the attic where it can be trapped and begin the cycle of mold growth.
The most common cause of attic mold by far is blocked or insufficient ventilation of the attic space.
Mold will survive in almost any environment that is the right temperature has moisture even in the air and has something for food e g.