These fibers consist of millions of microscopic fibrils.
Asbestos in attic.
Asbestos is actually a natural fiber so if your attic insulation looks like wool there is a slight chance that it will contain asbestos.
There are many different kinds of wool like insulation that are man made and do not have asbestos but if your attic insulation looks like wool than it is best to be safe and have it tested by a professional.
Asbestos attic insulation photos.
These are thin visible fibers.
The types of insulation that were most commonly made with asbestos are loose fill also called blown in insulation.
Asbestos is dangerous because it contains what is known as fibrous crystals.
Loose fill insulation comes in a variety of materials.
Asbestos was incorporated in the insulation of different types including attic insulation.
Asbestos can be found in the insulation used in walls attics the materials around plumbing and pipes electrical wiring as well as on heating and air conditioning units.
Also you need to consider if any disturbance of the insulation possibly by a contractor doing work in your attic may result in the fibers being deposited into other areas of your house where an exposure might be possible.
If your attic or wall insulation is in batt or blanket form whether it s fiberglass cellulose or another material you generally don t have to be concerned about asbestos.
Here are selected photos on this topic but full relevance is not guaranteed.