Sheep's Wool Insulation - Thermafleece Cosywool
Thermafleece Cosywool sheep's wool insulation rolls are a truly sustainable insulation product made using British Wool and manufactured in the UK. Cosywool is an easy-to-use sheep's wool insulation, supplied in compressed, packed rolls for quick installation. Made from 75% sheep wool and 25% polyester (a minimum of 20% of the polyester binder comes from recycled sources). The Cosywool Rolls have all the benefits of sheep wool while remaining very affordable and non-itchy insulation *.
Great for loft, wall, and floor insulation. It has high acoustic insulation properties, making it also great for partition walls, campervans, and as part of a soundproofing system.
Sheep wool insulation has a very low embodied energy and acts as a moisture buffer by absorbing and releasing excess moisture (can absorb up to 30% of its weight in 100% relative humidity conditions). Like all Thermafleece wool products, it is long-lasting, safe to handle, itch-free* and can contribute to a healthier indoor environment by acting as a moisture buffer and absorbing indoor pollutants such as formaldehyde in the building fabric.
Please contact us if you plan to use Thermafleece Cosywool in Saunas.
If you are unsure how much you require, please call us on 01239 777009 or contact us for a quote. Please note: Prices are per roll.
- Widths Available (mm): 370 or 570 (400 mm width also available in the 100mm thickness)
- Thicknesses Available (mm): 25, 50, 75, 100, 140 or 150mm thick***
- 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
- Manufactured to ISO 9001 & 14001
- Can be recycled
- Tested and approved moth/beetle proofing to ISO 3998
Our sheep wool insulation may have a natural "sheepy" smell, which can vary between batches due to the variability of the fleeces used (Some sheep smell worse than others!). Given time and ventilation, this scent will dissipate. Thank you for your understanding. If you are sensitive to this, please consider an alternative product.
Installation Guides (opens in new tab)
Cosywool Technical Information (opens in new tab)
- Cosywool Typical U-Values
- Cosywool Acoustic Information
- Cosywool Technical Data Sheet
- Cosywool Factsheet
Additional Documentation (opens in new tab)
- Wool Performance Benefits
- Indoor Air Quality
- Wool & Moisture
- Acoustic Absorption Summary
- Risk of Rodent Damage
Case Studies:
* Some users generally find wool itchy to touch.
Further Information
Environmental Product Declaration (EPD) for Cosywool (pdf)
EPDs are a way to determine and publish the environmental impact of products and cover a range of aspects, including embodied carbon, measured as the product's Global Warming Potential (GWP). The data on the Thermafleece Cosywool, Ultrawool and SupaSoft insulation EPDs is published for the thickness required to achieve an R value of 1, enabling easy comparison with other products.
Packaging and Waste Management
***The rolls come in compressed packs, which minimise transport costs. 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.
Cosywool insulation is packaged in plastic wrap made of Low-density polyethylene (LDPE) - number 4 in the recycling triangle code. This plastic wrap is 100% recyclable and can be recycled along with plastic bags.
Cutting to size
Cosywool can be cut to size whilst it's still in its roll format using an insulation saw.
FAQ's
Do you have more questions about Cosywool or using sheep's Wool Insulation? Check out our full Cosywool Sheep's Wool Insulation FAQ's
