Thermafleece CosyWool Roll

Thermafleece CosyWool Roll is a versatile, affordable, and eco friendly insulation made with a wool rich blend of 75% British sheep's wool and 25% recycled fibres. It delivers outstanding thermal and acoustic performance, while its convenient compressed form makes it easy to transport, store, and install. Once unrolled, it expands back to its full thickness, giving you long lasting insulation that improves both energy efficiency and indoor comfort.

Unlike some alternatives, research shows that this carefully balanced blend of wool and recycled fibres actually outperforms products with a higher wool percentage, offering enhanced performance, durability, and sustainability.

Like all Thermafleece insulation, CosyWool Roll is safe to handle, long lasting, and naturally breathable, helping regulate indoor moisture and absorb airborne pollutants - contributing to a healthier living environment.

Why Choose Thermafleece CosyWool Roll?

• Affordable and Cost Effective - designed to make natural wool insulation more accessible, while energy savings mean it quickly pays for itself.
• Excellent Performance - with thermal conductivity of 0.039 W/m·K and up to Rw = 40dB sound reduction.
• Long Lasting and Durable - includes a lofting agent to maintain structural integrity for decades.
• Sustainable Choice - made with British wool, reduces CO₂ emissions, and locks in carbon.
• Breathable and Healthy - natural fibres helps regulate humidity for healthier buildings and occupants.
• Safe and Easy to Handle - chemical free, recyclable, and safe for DIY or professional installation.
• Quality Assured - manufactured to ISO 9001 standards and tested to meet UK building regulations.

Technical Specifications

• Thermal Conductivity: 0.039 W/m·K
• Water Absorption (@100% RH): 30% w/w
• Specific Heat Capacity: 1800 J/kg·K
• Vapour Resistivity: 9 MN·s·g⁻¹·m⁻¹
• Acoustic: Rw = 40dB
• Mould Resistance: Pass (CUAP 2002-01-25)
• Moth and Beetle Resistance: Pass (ISO 3998)
• Fire Performance: EuroClassE | BS 5803-4 (Pass) | EN 11925-2 (Pass)
• Thickness Recovery: Pass (EN 823)
• Dimensional Stability: Pass (EN 1604)

Available Sizes:

Thickness: 25mm, 50mm, 75mm, 100mm, 140mm, 150mm

Width: 370mm and 570mm

Roll Lengths:

• 25mm - 12m
• 50mm - 13m
• 75mm - 8.5m
• 100mm - 6.5
• 140mm - 4.6m
• 150mm - 4.3m

Installation and Handling

• Supplied in compressed rolls for easier transport and storage - expands on unpacking.
• Non hazardous - no gloves or specialist clothing needed (PPE recommended in lofts or dusty space).
• Store dry, under cover, and away from direct sunlight.
• Replace any insulation that becomes wet in storage or service.
• Not suitable for use as a standalone cavity barrier - when installed in walls or floors, ensure compliance with cavity/fire barrier requirements.

Whether you're insulating a loft, wall, or floor, Thermafleece CosyWool is the smart choice for eco friendly, affordable, and high performance insulation that makes homes warmer, quieter, and healthier - while reducing carbon impact.