Thermafleece UltraWool helps to provide exceptional acoustic insulation performance in wall, floor and roof systems. UltraWool is a high density ultra-efficient insulation rich in British sheeps wool and is the ideal choice if you are looking for maximum thermal performance when space is at a premium Research shows that using 75% wool in combination with recycled fibres outperforms alternative products with a higher percentage of wool. Our wool rich blend ensures you get the full benefit of sheeps wool with enhanced performance, durability and sustainability. Like all Thermafleece products, it is long-lasting, safe to handle and contributes to a healthier indoor environment by regulating moisture and absorbing harmful airborne substances in the home. Deliveries to the postcodes AB, IV, KW, PH, PA, HS, KA, ZE and to ROI/NI may incur additional delivery charges. 14.04m2 coverage per pack.30 item pack. Properties Length: 1.2m. Width: 390mm. Thickness: 50mm. Thermal Conductivity: 0.035 W/mK. Thermal resistance: 1.43 mK/W. Water Absorption (@100% RH): 24% w/w. Specific Heat Capacity: 1800 Jkg-1K-1. Ignition point: >500C. Density: 31 kgm-3. ApplicationRoofs: loft & warm roof.Walls: timber frame & solid wall.Floors: suspended ground floor & between floor.