It is completely fireproof. But you shouldn't use it because it's bad for your lungs. Asbestos insulation was valuable because it was a highly efficient insulation for its weight and unlike some other forms of insulation, it would not burn. In ships, especially, asbestos insulation in the early 20th century was important because it added much less weight than the available alternatives. Thus a ship had the ability to carry more armor or more weapons for the same total weight. Since the naval treaties of the early 20th century limited the ships a country could have in its navy by their displacement (weight) this was very important.
Insulation used to contain asbestos, but modern insulation materials do not contain asbestos.
Some, but not all, forms of insulation used to contain asbestos. Insulation applied new now does not contain asbestos.
Currently it is illegal to add insulation to a home with more than a very small percentage of asbestos. Exposure to these small quantities of asbestos typically do not cause harm and are considered to be safe. Older homes may have asbestos insulation that needs to be removed as these older forms of insulation do present certain health risks.
Gypsum insulation made prior to the 1970s included asbestos as a means of providing increased physical strength and insulation capacity to the product. Gypsum insulation made after the 1980s generally did not contain asbestos.
To determine if insulation contains asbestos, you should hire a professional asbestos inspector to conduct a thorough inspection and testing of the insulation material. Asbestos can be harmful if disturbed, so it's important to handle it with caution.
Does johns-manville spintex blown insulation contain asbestos
The only way to reliably identify asbestos-containing insulation is to have a small sample analysed by a qualified laboratory.
No, masonite does not contain any asbestos.
Yes, some wire insulation has asbestos.
Rock wool insulation was a substitute for asbestos insulation. You bought one or the other, not both.
Rock wool insulation is typically softer and more flexible than asbestos insulation. Asbestos insulation is denser, heavier, and may have a fibrous texture resembling human hair. It is recommended to have a professional conduct testing to properly identify asbestos-containing materials.
Asbestos insulation has no characteristics that make it look any different from other forms of insulation intended for the same application. The only way to know for certain whether insulation contains asbestos is to have a sample analysed in a qualified laboratory. Insulation on pipes and boilers is often white and chalky in appearance. Other forms of insulation have different appearances.