This is unusual and typically only occurs when an attic suffers from.
Mold in attic insulation.
If you re layering insulation atop other insulation don t use the kind that has kraft face finish i e paper or foil backing.
If you have mold in the attic we recommend consulting with a mold removal specialist because.
Blocked or insufficient ventilation.
Improper exhausting of bathroom fans or dryer vents.
Insulation is often affected.
This is typically done with an ulv fogger and sprayed throughout the attic area.
3 fog the attic with a mildicide.
Heating ventilation and air conditioning ducts may also.
Dryer exhaust vents kitchen exhaust fans and bathroom exhaust fans.
This moisture feeds mold growth.
This would be considered light mold growth.
Close up of mold growth on white fiberglass insulation.
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.
Wet insulation should be removed as quickly as possible and allowed to dry.
The most common cause of attic mold by far is blocked or insufficient ventilation.
Replacement of insulation may be necessary if this is the case.
Cardboard paper or loose fill insulation should be disposed of as these will be practically impossible to clean.
Brush all contaminated porous insulation such as fabric or foam with a wire brush to remove loose mold.
What causes attic mold.