Thermafleece Cosywool roll insulation is ideal for loft, wall, and floor insulation, boasting excellent acoustic insulation properties.

Its versatility extends to applications in partition walls and campervans and as a critical component in soundproofing systems.

If you are unsure how much you require, please call us on 01239 460470 or contact us for a quote. 

Please note: Prices are per roll.

Sustainability

Thermafleece CosyWool stands out for its environmental benefits. It can significantly reduce CO2 emissions throughout its lifespan, contributing to a greener future. Wool, a key component, actively fixes carbon dioxide, reducing greenhouse gas levels.

Breathability

Insulating with breathable natural fibres, such as those found in Thermafleece, promotes stable humidity and moisture levels within buildings. This not only enhances the building's health but also contributes to the well-being of its occupants.

Specifications

• Widths Available (mm): 370 or 570 (400 mm width also available in the 100mm thickness)
• Thicknesses Available (mm): 50, 75, 100, 140, or 150mm
• Thermal conductivity: 0.039 W/mK
• Density: 18 kgm³
• Ignition Point: >500°C
• Sound absorption: NRC 1.05 @ 100mm
• Sound reduction: Rw 40dB @ 75mm
• Highly breathable
• Made in the UK
• Contains British Wool
• Manufactured to ISO 9001
• Can be recycled.

Composite Structure

Thermafleece CosyWool Rolls incorporate a polyester binder, striking a balance that outperforms alternatives with a higher percentage of wool. The 75% wool combined with recycled polyester fibres ensures optimal benefits of sheep’s wool, including enhanced performance, breathability, durability, and sustainability.

Installation & Cutting Tips

The 'Roll and Cut' method is recommended for precise cutting. Use a Sharp Scalloped Edge Knife or Insulation Saw for best results.

• To cut length: Roll the insulation tightly along the width, measure, and cut through for a neat edge.
• To cut width: Keep the insulation rolled and measure the desired width. Using the knife or insulation saw, cut through the entire roll without unwinding for accuracy.

When installing Thermafleece Cosywool, it's advised to ensure the roll width is slightly oversized, which allows for 'friction fit', where the insulation can expand in place and lock itself in.

When Cosywool is unpacked, it will be compressed for ease of handling and transport. The insulation is intended to expand in place, which improves the friction fit. Once unpacked, it can take up to 10 days to recover 85% of its nominal thickness; it will continue to regain full depth in situ, which can take up to 6 weeks.

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.

*2026 Update* - Thermafleece advises against using Cosywool in Saunas.

Documents

• Cosywool Rolls Factsheet
• Cosywool Rolls Technical Data Sheet
• Cosywool Rolls Declaration of Performance
• Cosywool Rolls Environmental Performance Declaration

Installation Guides

• Cold Roof
• Warm Roof
• Suspended Floor
• Walls

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