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.
UltraWool is high density with better thermal values offer more efficient thermal and acoustic characteristics.
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 UltraWool range includes the following readily available product thicknesses: 50mm, 70mm and 90mm.
General information about Thermafleece UltraWool
General application insulating slab
Thermafleece's natural sheeps wool slabs, UltraWool, is suitable for use in roofs, walls and floors throughout the building.
Thermafleece UltraWool slab is manufactured by combining British sheeps wool (75%) and recyceled polyester and binders (25%) before being compressed and cut into dense slabs.
|Thermal Conductivity||0.035 W/m·K|
|Nominal Density||approx. 31 kg/m³|
|Slab Width||0.39m and 0.59m|
|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|
Buy Thermafleece UltraWool slabs
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.
Please observe the 'Star Rating' indicators to assess availability.
Generally 1 or 2 days for delivery
Generally 1 to 5 days for delivery
Generally 5 to 10 days for delivery
Generally 5 to 15 days for delivery
Please call to check availability and approximate lead times
Product availability depends upon stock levels at closest depot and delivery logistics to geographic locations
Product Performance and Guides
Product Performance, Manufacturer Certification, Downloads, and Installation Guides
While we have provided Thermal Resistance values for all thicknesses on the Thermafleece UltraWool datasheet, some thicknesses are made up of multiple layers.
Items highlighted in green are generally held in stock by Thermafleece.
|UltraWool 50mm||50mm||1.43 m²K/W||1.54 kg/m²|
|UltraWool 70mm||70mm||2.00 m²K/W||2.14 kg/m²|
|UltraWool 100mm||100mm||2.86 m²K/W|
|UltraWool 140mm||140mm||4.00 m²K/W|
|UltraWool 190mm||190mm||5.43 m²K/W|
|UltraWool 240mm||240mm||6.86 m²K/W|
Standards & Approval
Thermafleece UltraWool 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 UltraWool datasheet
- Thermafleece UltraWool DoP
- Thermafleece Cold Roof application
- Thermafleece Warm Roof application
- Thermafleece Floor application
- Thermafleece Wall application
- Thermafleece Brochure
- Thermafleece Acoustic Absorbtion leaflet
- Thermafleece Indoor Air Quality leaflet
- 'How to Cut' Thermafleece Guide