Building insulation materials are thermal insulation materials used in the construction or retrofit of buildings.
Building insulation is low-thermal-conductivity material used to reduce building heat loss and gain, and reduce noise transmission. Cellulose insulation is plant fiber used in wall and roof cavities to insulate, draught proof and reduce noise.
Four major types of loose-fill cellulose products have been developed. These are generally characterized as dry cellulose, spray applied cellulose, stabilized cellulose, and low dust cellulose. These types are used in different parts of a building and for different reasons.
Wood fibre insulation is available as loose fill, flexible batts and rigid panels for all thermal and sound insulation uses. It can be used as internal insulation: between studs, joists or ceiling rafters, under timber floors to reduce sound transmittance, against masonry walls or externally.