If you want maximum thermal performance, mainly where the depth of insulation is restricted, then Thermafleece UltraWool slabs are the ideal choice. With a 31 kg/m3 density, Thermafleece UltraWool also offers exceptional acoustic insulation performance in wall, floor and roof systems. 

High Performance - With a Thermal Conductivity of 0.035 W/mK, Thermafleece UltraWool is the best-performing natural fibre-based insulation on the market. 

Sustainable - Thermafleece UltraWool can reduce CO2 emissions by many tonnes over the lifetime of use.  Wool also fixes carbon dioxide helping reduce greenhouse gas levels. 

Breathable - Insulating with breathable natural fibres can contribute to more stable humidity and moisture levels within buildings.  This can help improve the health of the building and the occupants. 

• Widths Available (mm): 390 or 590 
• Thicknesses Available (mm): 50, 70, or 90 
• Thermal conductivity – 0.035 W/mK 
• Density: 31 kgm³ 
• Ignition Point: >500°C 
• Sound absorption – NRC 1.10 @ 90mm 
• Sound reduction – Rw 41dB – 54dB @ 70mm 
• Highly breathable 
• Made in the UK 
• Contains British Wool 
• Manufactured to ISO 9001 & 14001 
• Can be recycled. 

This product will smell sheepy, which can become more apparent when near it. If you are sensitive to this, please consider another product. Given time to air any smell will dissipate.

Installation Guides (opens in new tabs)

• Cold Roof
• Warm Roof
• Suspended Floor
• Walls