Thermafleece CosyWool slab sheeps wool insulation Thermafleece CosyWool Insulation

Thermafleece CosyWool Slab

British sheeps wool insulation for general applications within the building envelope.

Suitable for use in a number of applications including roof, wall and floor systems.

Made in Britain from 75% British sheeps wool and 25% recycled polyester.

CosyWool slabs are denser than the rolls allowing for a tighter friction fit in walls and roofs.

Higher thermal mass helps buffer heat to reduce summertime overheating.

Allows a healthy moisture balance helping protect building fabric and health.

Can be safely handled without gloves or protective clothing

Thicknesses and Availability:

This Cosywool slab range includes the following readily available product thicknesses: 50mm, 75mm, 100mm and 140mm.

Product Information

General information about Thermafleece CosyWool Slab

Product Application

General application insulating slabs

Thermafleece's natural sheeps wool slabs, CosyWool, is suitable for use in roofs, walls and floors throughout the building.

Product Make-up


Thermafleece CosyWool slab is manufactured by combining British sheeps wool (75%) and recycled polyester and binders (25%) before being compressed and cut into dense slabs.

Product Properties

Thickness 50mm to 140mm
Slab Length 1.2m
Slab Width 0.39m and 0.59m

Product Prices

Buy Thermafleece CosyWool Slab

These items are shipped direct to site from the manufacturer; carriage charges will apply. The carriage charge is based on the number of packs ordered. Please select the appropriate CosyWool product(s) and relevant delivery charge before adding to the basket. If an order is placed without, or with an incorrect delivery charge, I will contact you before processing the order.

Product ex-VAT inc-VAT
Thermafleece CosyWool Slab 50mm, 42 x 0.39x1.2m = 19.66m² £145.12 £174.14
Thermafleece CosyWool Slab 50mm, 28 x 0.59x1.2m = 19.82m² £146.30 £175.56
Thermafleece CosyWool Slab 75mm, 27 x 0.39x1.2m = 12.64m² £139.60 £167.52
Thermafleece CosyWool Slab 75mm, 18 x 0.59x1.2m = 12.74m² £140.71 £168.85
Thermafleece CosyWool Slab 100mm, 21 x 0.39x1.2m = 9.83m² £144.79 £173.74
Thermafleece CosyWool Slab 100mm, 14 x 0.59x1.2m = 9.91m² £145.97 £175.16
Thermafleece CosyWool Slab 140mm, 15 x 0.39x1.2m = 7.02m² £144.79 £173.74
Thermafleece CosyWool Slab 140mm, 10 x 0.59x1.2m = 7.08m² £146.03 £175.23
Please add one of the below delivery charge options, based on the number of packs of Thermafleece CosyWool being ordered:
Delivery Charge ex-VAT inc-VAT
1 x pack of Thermafleece CosyWool Slab £30.00 £36.00
2 x packs of Thermafleece CosyWool Slab £60.00 £72.00
3 - 4 packs of Thermafleece CosyWool Slab £70.00 £84.00
5 - 8 packs of Thermafleece CosyWool Slab £140.00 £168.00
9 - 12 x packs of Thermafleece CosyWool Slab £210.00 £252.00
13 - 16 packs of Thermafleece CosyWool Slab £280.00 £336.00
17 - 20 x packs of Thermafleece CosyWool Slab £350.00 £420.00
21+ packs of Thermafleece CosyWool Slab £420.00 £504.00

Reasonable stock levels are held with delivery lead times being around 4-5 working days. Larger orders may take a little longer.

Thermafleece reserves the right to change stocked products - while we will do all we can to keep on top of changes, availability and lead times my vary.

  • Generally 1 or 3 working days for delivery
  • Generally 1 to 5 working days for delivery
  • Generally 5 to 10 working days for delivery
  • Special request or made to order item, allow extended lead times. Minimum order levels may apply.
  • Please call to check availability and approximate lead times

Product Performance and Guides

Product Performance, Manufacturer Downloads, and Installation Guides

Product Performance

Thermal Conductivity 0.038 W/m·K
Nominal Density approx. 22 kg/m³
Water Absorption 30% w/w @100% RH
Mould Resistance Pass CUAP 2002-01-25
Moth/Beetle Proofing Pass ISO 3998
Vapour Resistance > 9 MNs/gm
Product Thickness Thermal Resistance kg/m²
CosyWool slab 50mm 50mm 1.32 m²K/W 1.09 kg/m²
CosyWool slab 75mm 75mm 1.97 m²K/W 1.63 kg/m²
CosyWool slab 100mm 100mm 2.63 m²K/W 2.19 kg/m²
CosyWool slab 140mm 140mm 3.95 m²K/W 3.08 kg/m²

Standards & Approval

Thermafleece CosyWool slab is manufactured in accordance with quality management system ISO 9001. All products must be installed in accordance with guidance issued by Thermafleece.

Where building regulation approval is required, you should take advice from your local building control authority and the building designer.

  • GWP (A1-A3): 1.63 kgCO2e
  • GWP (A1-A3) inc. biogenic carbon: 0.59 kgCO2e
  • Recycled Content: 20%
  • Recyclable: Yes

Thermafleece Videos

How to cut Thermafleece insulation