Building insulation materials is used depends on a wide variety of factors. Some insulation materials have health risks, some so significant the materials are no longer allowed to be used but remain in use in some older buildings such as asbestos fibers and urea. Factors affecting the type and amount of insulation to use in a building include: Considerations regarding building and climate: Often a combination of materials is used to achieve an optimum solution and there are products which combine different types of insulation into a single form. Spray foam is a type of insulation that is sprayed in place through a
Mineral wool Mineral wool Mineral wool is any fibrous material formed by spinning or drawing molten mineral or rock materials such as slag and ceramics. Applications of mineral wool include thermal insulation (as both structural insulation and pipe insulation, though it is not as fire-resistant as high-temperature insulation wool), filtration, soundproofing, and hydroponic growth medium. Mineral wool is also known as "mineral fiber", "mineral cotton", "mineral fibre", "man-made mineral fibre" (MMMF), and "man-made vitreous fiber" (MMVF). The nomenclature of these wool products is simply the parent/raw material name in prefix to "wool". Specific mineral wool products are "stone wool" and "slag wool".