Vermiculite has been around since the 1800s but most of the asbestos contaminated vermiculite found in homes dates from the early 1920s to 1990.
Asbestos found 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.
In fact it s still used heavily in some parts of the world such as india and china.
Gentry october 8 2015 at 6 10 pm.
Once vermiculite is disturbed millions of asbestos fibers become airborne.
Consider this statement from research titled zonolite attic insulation exposure studies where even the suggested method for removal by the manufacturer.
There is one primary source of asbestos attic insulation.
Asbestos was a popular material for most of the twentieth century mainly because of its ability to insulate and act as a fire retardant.
There are other sources of asbestos in attic insulation but this single source significantly outpaces the others the primary source of asbestos attic insulation is from a specific mine in montana operated for 70 years by the libby company according to the environmental protection.
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.
Attic insulation in older homes may contain asbestos that could fall through ceiling cracks.
But just because your insulation is old doesn t mean it is dangerous.
If you notice that you have insulation that is falling apart in your building have a professional inspect for asbestos.
The asbestos found in vermiculite is extremely friable and is the most dangerous type amphibole of asbestos.
æ s ˈ b ɛ s t ə s or æ s ˈ b ɛ s t ɒ s is a term used to refer to six naturally occurring silicate minerals all are composed of long and thin fibrous crystals each fibre being composed of many microscopic fibrils that can be released into the atmosphere by abrasion and other processes.
While remodeling the attic of his 1960s home john found piles of brown pebble like insulation.
He decided to replace the existing insulation with new fiberglass insulation to save money in the winter months.
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.
In older homes specifically asbestos may be found in many different materials from pipe insulation to flooring adhesive to roof shingles.