As with other building materials, knowledge of the history of the construction can help you eliminate some materials that are too new to contain asbestos. For the rest, the only way to determine with certainty if asbestos is present is to have a sample sent to a lab and examined microscopically.
Many materials can be examined in a polarized light microscope to determine whether and how much asbestos is present.
However, because of the way flooring materials are made, it is usually necessary to examine the same with an electron microscopy to be certain that asbestos is not present.
Installing asbestos flooring involves less disturbance to the asbestos-containing product than does removal of asbestos felt roofing. Consequently the flooring installer probably has less exposure to airborne asbestos fiber than does the roofing remover, and therefore less risk of developing cancer.However, if a similar comparison is made between the flooring remover and the roofing remover, the greater risk falls to the flooring remover.
Installing asbestos flooring involves less disturbance to the asbestos-containing product than does removal of asbestos felt roofing. Consequently the flooring installer probably has less exposure to airborne asbestos fiber than does the roofing remover, and therefore less risk of developing cancer.However, if a similar comparison is made between the flooring remover and the roofing remover, the greater risk falls to the flooring remover.
Carefully
No
Linoleum is actually a brand name which is often confused with all types of sheet vinyl. In fact many types of sheet vinyl have asbestos in the backing as well as in the associated mastics used for installation. The backings can have very high Chrysotile content of up to 65% and should be approached with caution if there are plans to disturb it or if it is in deteriorated condition. Date of manufacture is very helpful as asbestos content in sheet vinyl falls dramatically after 1985 but before that asbestos is very common in all resilient flooring.
Asbestos was banned in sheet materials in the United States in the late 1970s. The use of asbestos in sheet materials has declined globally due to health concerns associated with asbestos exposure and regulations restricting its use.
what is the weight of a 10 foot big six asbestos sheet
That will depend on size and thickness of the sheet. MANY of the asbestos products have been removed from the market, or are strictly regulated due to the health hazards of asbestos. There are other fireproof materials available.
The difference between corrugated asbestos roofing and flat asbestos cement sheet is the form in which it was cast and, perhaps, the thickness of the finished product. Asbestos was merely an additive to cement. Both products are basically cement with a fiber strengthener that happens to be asbestos.
Presumably, one contains asbestos fibers and the other does not; or One is corrugated and the other is flat.
waffles
The only way to tell whether a gasket has asbestos or not is to have it sampled by a qualified person and analysed in a qualified laboratory.