Fibreglass Insulation

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What Is Fibreglass Insulation Used For? Fibreglass insulation is suitable for a wide range of applications. Used for loft insulation , it's laid between or across joists to reduce heat loss through the roof. Knauf Loft Roll and Isover Spacesaver are popular choices here with Combi-Cut perforations that make it easy to cut to fit standard joist spacings without extra tools. Superglass Multi Roll is another reliable option, available in a range of thicknesses to suit different thermal targets. For acoustic insulation , glass wool air-pocketed structure makes it an effective sound absorber, reducing noise transmission between rooms and from neighbouring properties. Superglass Acoustic Roll and Knauf Acoustic roll are designed specifically for this, fitting between studs in partition walls and floors. For cavity wall insulation , fibreglass batts pack out the gap between masonry skins, addressing one of the biggest sources of heat loss in older homes. Superglass Superwall Cavity Batts are designed for this application and supplied in convenient packs. Why Choose Fibreglass Insulation? Fibreglass insulation is non-combustible, achieving the highest possible Euroclass A1 fire rating for both safety and Building Regulations compliance. It's also resistant to mould and won't degrade over time when kept dry, making it a reliable long-term choice. It's lightweight and straightforward to handle, which keeps installation quick whether you're a contractor or tackling a DIY project. Plus, it’s manufactured from recycled glass, making it a more sustainable option than many alternative materials. One thing worth knowing: glass wool should be kept dry, as it loses its insulating properties if it gets wet. It can also cause skin irritation, so gloves and protective clothing are recommended when handling and cutting it. Choosing the Right Thickness Fibreglass insulation is available in thicknesses from 25mm up to 280mm, with thermal conductivity values ranging from 0.032 to 0.044 W/mK