Mold spores look black and dark like this.
Black flakes in attic.
A technician can tell you if the problem is the duct liner.
Black mold in attics.
This summer i cleaned the portion of the black stain with a dry mop as much as i could reach from the hatch opening.
In this photo of very dark mold in an attic in a wet attic mold which we found to be brown in the microscope looked black on the plywood.
Hire a mold remediation specialist.
If the duct liner is the source of the black dust it should be replaced right away as the particles could be dangerous if inhaled.
If you see those black particles you ll need to have a mold remediation specialist.
While the black stains are either mould or just black dust from attic insulation settled on the.
Deteriorating duct liners produce black particles which blow from the vents and collect on walls or the ground.
But just because your insulation is old doesn t mean it is dangerous.
It is also a potential breeding ground for black mold because it is often hot and humid and there is a potential for water seepage.
Black flakes on sheathing might be clear shellac or silver paint post smoke remediation flaking off not surprising after years of drought and hot summers even from off site generated smoke drawn into the attic from past events.
When this seepage occurs it can often go.
A quick visual inspection can tell you whether or not you should get your insulation tested for asbestos.
One of the most common materials containing asbestos fibers is attic and wall insulation.
Last winter i took a look into the attic and noticed black stains and water marks on a portion of the sheathing material.