Fiberglass insulation 50mm non-FSK is a lightweight thermal and acoustic insulation material made from fine glass fibers bonded together to form a resilient mat. Designed for use in walls, ceilings, and roof spaces, this non-foil-faced (non-FSK) variant offers excellent heat resistance and sound absorption without the reflective aluminum layer, making it ideal for internal applications where vapor control is not required. The 50mm thickness provides reliable energy efficiency, helping to maintain comfortable indoor temperatures and reduce noise transfer. It is easy to install, non-combustible, and compatible with most ceiling and wall systems, making it a cost-effective solution for both residential and commercial buildings.