A.Cutting or breaking asbestoscement board or shingles releases asbestos fibers into the air. To remove shingles without breaking, apply pressure near the nail head to expose the head enough to cut it off with side-cutters.
If at all possible, asbestos shingles should be cut with a shingle cutter. Sawing siding panels with an abrasive saw will release large quantities of fibers. The shingles can also be scored with a carbide knife and snapped clean. In either case, a respirator with a HEPA filter should be worn.
to read the full article.