Asbestos-containing materials (ACMs) can be either friable or non-friable. Friable ACMs are materials that can be easily crumbled or reduced to a powder by hand pressure. Non-friable ACMs are materials that are not easily crumbled or reduced to a powder by hand pressure. Friable ACMs pose a greater health risk than non-friable ACMs because they are more likely to release asbestos fibers into the air when disturbed. Some examples of friable ACMs include:

1). Asbestos-containing insulation

2). Asbestos-containing ceiling tiles

3). Asbestos-containing floor tiles

4). Asbestos-containing pipe insulation

5). Asbestos-containing joint compound

Examples of non-friable ACMs include:

1). Asbestos-containing roofing shingles

2). Asbestos-containing siding

3). Asbestos-containing cement pipe

4). Asbestos-containing floor tiles

5). Asbestos-containing mastic.