Thermafleece CosyWool Slab

Thermafleece CosyWool Slab is a versatile flexible insulation rich in British sheep’s wool and is the ideal choice if you are looking for all round performance and value for money.

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 sheep’s wool with enhanced performance, durability and sustainability.

CosyWool Slabs are flexible but denser than rolls and provide friction fit in walls and roofs providing excellent thermal and acoustic performance.

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.

Why Insulate with Thermafleece CosyWool Slab?

Insulating a property will significantly reduce the amount of energy lost from the building envelope, reducing energy consumption and carbon dioxide released to the atmosphere.

Affordable

Thermafleece CosyWool Slab is designed to minimise up-front cost making wool-based insulation more affordable to a wide range of end users. What’s more, the energy it saves means Thermafleece CosyWool Slab quickly pays for itself.

Long Lasting

Thermafleece CosyWool Slab contains a lofting agent to maintain durability, fibre stability and structural integrity creating a long-lasting insulation.

Quality Assured

Thermafleece CosyWool Slab is manufactured and supplied in accordance with ISO 9001 quality management systems.

Sustainable

Thermafleece CosyWool Slab can reduce CO2 emissions by many tonnes over the lifetime of use. What’s more, wool 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.

Safe

Thermafleece CosyWool Slab is safe to handle and can be recycled or safely disposed of at the end of its life.

Specifications

Performance
• Thermal Conductivity: 0.038 Wm-1K-1
• Water Absorption (@100% RH): 30% w/w
• Specific Heat Capacity: 1800 Jkg-1K-1
• Mould Resistance: CUAP 2002-01-25: Pass
• Moth/Beetle Proofing: ISO 3998: Pass
• Vapour Resistivity: 9 MN·s·g-1m-1
• BS 5803-4, Flammability & Smoulder Resistance:
Pass
• EN11925-2, Reaction to Fire: Pass
• Fire Classification: EuroClass E
• Recoverability and thickness, EN 823: Pass
• Dimensional stability to EN 1604: Pass
• Can be used to achieve airborne sound reduction
of Rw = 40dB

Standards
• Manufactured to ISO 9001

Environmental
• GWP (A1-A3) total: 0.06 kgCO2e R1
• Recycled Content: 20%
• Recyclable: Yes
• EPD registration no. S-P-04468
• EPD valid to 31/10/26

Sizes
• Thicknesses – 50,75,100,140 mm
• Widths – 370 & 570 mm
• Slab Length – 1200 mm, all sizes

Installation and Handling

Thermafleece CosyWool is non-hazardous and can be handled without protective clothing, although we recommend you wear PPE in spaces such as lofts.

Protect the insulation from prolonged exposure to sunlight when unpacked and avoid wetting, store under cover and clear of the ground.

If the insulation gets wet during storage or as a result of flooding in service, remove the affected insulation and replace with new.

When installed in walls and floors, spaces filled with CosyWool should be considered as concealed voids for the purposes of fire risk and cavity barriers installed as appropriate. Thermafleece CosyWool is not suitable for use as a cavity barrier.