At Unity Lime, our sisal insulation is a natural fibre solution designed for those seeking breathable, sustainable alternatives to conventional insulation materials. Sourced from the strong, fibrous leaves of the agave plant, sisal offers dependable thermal and acoustic insulation while supporting healthier indoor environments. This insulation is particularly well-suited to heritage buildings, eco-renovations, and new builds where vapour permeability and compatibility with natural materials are key.

Unlike synthetic insulation, sisal fibre insulation allows moisture to pass through, helping to prevent condensation and maintain stable internal humidity. This makes it ideal for use alongside lime plasters, earth mortars, timber frames, and other breathable construction methods. Its naturally dense and fibrous structure adds to its thermal performance and long-term durability, with resistance to rot and degradation in well-ventilated systems.

Free from chemical irritants and safe to handle, sisal insulation aligns with sustainable building values—offering a renewable, low-carbon alternative that doesn’t compromise on performance. Whether you’re upgrading an older home or constructing a low-impact property from the ground up, our natural sisal insulation provides a reliable and environmentally responsible choice for thermal comfort and fabric health.