Building insulation materials jagged, shredded, or scuffed). When found in the home, asbestos often resembles grayish-white corrugated cardboard coated with cloth or canvas, usually held in place around pipes and ducts with metal straps. Things that typically might contain asbestos: All polyurethane foams are composed of petrochemicals. Foam insulation often uses hazardous chemicals with high human toxicity, such as isocyanates, benzene and toluene. The foaming agents no longer use ozone-depleting substances. Personal Protective Equipment is required for all people in the area being sprayed to eliminate exposure to isocyanates which constitute about 50% of the foam raw material. Fiberglass is the most common
Building insulation materials hour fire rating according to DIN (German) standards. An additional source of insulation derived from hemp is hempcrete, which consists of hemp hurds (shives) mixed with a lime binder. It has little structural strength but can provide racking strength and insulation with comparable or superior R-values depending on the ratio of hemp to binder. Sheep's wool insulation is a very efficient thermal insulator with a higher performance than glass fibre and no reduction in performance even when condensation is present. It is made from the waste wool that the carpet and textile industries reject, it is available in both rolls