Rockwool Attic Insulation Asbestos

A home inspector pointed out that the insulation behind the upstairs knee walls is called something wool.

Rockwool attic insulation asbestos. However there are loose fill wall and attic insulation which can contain asbestos. Rock wool is a silica based stranded insulation very similar to fiberglass. Loose fill insulation comes in a variety of materials. 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.

Select your attic insulation application. Mineral wool insulation rock wool is made from mineral fibers manufactured from stone and waste from mining. It remained prominent in construction through the 1950s. The types of insulation that were most commonly made with asbestos are loose fill also called blown in insulation.

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. It s old dirty and fibrous and the inspector told him that it should be tested for asbestos fibers. This is in part because it is a man made material that is quite dense and suitable. You may also find thousands of loose particles within walls or under attic flooring.

There is one primary source of asbestos attic insulation. Asbestos is a fiberous form of silica and traces of material that appear similar to asbestos under. Rock wool manufacturing company incorporated asbestos into mineral wool boards and insulation cement products that were used to help secure pipe insulation. 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.

Rock wool is another name for mineral wool insulation. Asbestos while many forms of insulation manufactured prior to the mid 1980s contain asbestos rock wool does not.