However there are loose fill wall and attic insulation which can contain asbestos.
Rockwool attic insulation asbestos.
The types of insulation that were most commonly made with asbestos are loose fill also called blown in insulation.
It remained prominent in construction through the 1950s.
Rock wool is another name for mineral wool insulation.
The material was developed in the 1850s and patented in the u s.
Mineral wool insulation rock wool is made from mineral fibers manufactured from stone and waste from mining.
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.
Normally mineral wool or rock wool slag wool or stone wool insulation does not contain asbestos but there are exceptions it would be unusual for a residential home to have rock wool insulation containing asbestos to know with absolute certainty i d have a sample of the insulation tested.
It s old dirty and fibrous and the inspector told him that it should be tested for asbestos fibers.
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.
Rock wool manufacturing company incorporated asbestos into mineral wool boards and insulation cement products that were used to help secure pipe insulation.
Select your attic insulation application.
Asbestos while many forms of insulation manufactured prior to the mid 1980s contain asbestos rock wool does not.
Rock wool is a silica based stranded insulation very similar to fiberglass.
Use rockwool thermal stone wool insulation to insulate the attic of a new build extension or to increase the r value and top up the current attic insulation especially in an older home.
If you re insulation is the batt style insulation as the loose fill insulation has the higher risk as it s loosely poured into wall or joist cavities.
A home inspector pointed out that the insulation behind the upstairs knee walls is called something wool.
There is one primary source of asbestos attic insulation.
Loose fill insulation comes in a variety of materials.
