The types of insulation that were most commonly made with asbestos are loose fill also called blown in insulation.
Asbestos in attic uk.
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.
A mine near libby montana was the source of over 70 percent of all vermiculite sold in the united states from 1919 to 1990.
Asbestos attic insulation photos.
Asbestos was used to make several exterior materials.
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There was also a deposit of asbestos at that mine so the vermiculite from libby was contaminated with asbestos.
Consider this statement from research titled zonolite attic insulation exposure studies where even the suggested method for removal by the manufacturer.
He decided to replace the existing insulation with new fiberglass insulation to save money in the winter months.
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Once vermiculite is disturbed millions of asbestos fibers become airborne.
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.
Roofing and siding shingles are among the most common materials to contain asbestos and will readily release fibers into the air if broken.
Asbestos was also put into cement used on the exterior of buildings to help insulate the.
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Concerns about asbestos contaminated vermiculite insulation.
Loose fill insulation comes in a variety of materials.
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While remodeling the attic of his 1960s home john found piles of brown pebble like insulation.
Most older cement board products contain asbestos.
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.
The asbestos found in vermiculite is extremely friable and is the most dangerous type amphibole of asbestos.
There is one primary source of asbestos attic insulation.
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