Other fibers are often used as replacements for asbestos. Fibreglas, rock woll and even carbon fibers can be used, depending on the application.
Asbestos provides better insulation, because it is thicker and denser than iron.
Asbestos provides better insulation, because it is thicker and denser than iron.
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.
Some older soffit boards are constructed from asbestos cement sheets, many types of insulation, if you have an older home with cloth wiring the cloth can contain asbestos as well.
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.
Asbestos cement
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.