Bought a home that was built in the late 1920s. Was checking around the attic when I saw "Johns-Manville Super Felt" insulation. Upon some research there seems to be contradicting information on whether this brand of insulation contains asbestos or not.
The ELG Law and Asbestos.com websites list Super Felt as part of the product line that has asbestos.
However, someone else at Inspectapedia.com cites research saying that rock wool generally does not contain asbestos and it is unlikely that this product line had it either. Since ACM insulation usually came in loose-fill or board format, not batts.
I realize the surefire way is to get a sample and have it tested. However, given that it seems to be largely intact and tearing a piece off would make it friable, I'd love some thoughts on how best to proceed.