If you re layering insulation atop other insulation don t use the kind that has kraft face finish i e paper or foil backing.
Attic moisture mold.
This moisture feeds mold growth.
Wood cardboard clothing dust leaves and other organic components provide the needed energy source.
How to spot attic mold due to high attic moisture or roof leaks.
These photos show mold on attic surfaces due to high moisture in that area.
And while it will cost some money to take care of it know that it can be taken care of quickly and at a reasonable cost.
Mold remediation currently being done throughout whole house.
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.
Attic hvac system causing condensation and high humidity which caused mold throughout attic.
Mold located on ductwork on roof decking trusses or just about anywhere in the attic is simply a problem of excessive moisture.
If your attic is well ventilated and has no moisture intrusion you won t have attic mold to deal with.
As such it is recommend you minimize attic storage as much as possible.
Unfortunately improper installation or choosing the wrong kind of insulation causes moisture from the lower levels of the home to rise and get trapped in the attic.
Mold requires moisture moderate temperatures and a source of energy to grow.