Key Features
- Thermafleece Roll PB20 - PB 570 100 Dimensions: 5300 x 570 x 100mm - 2 per pack
- Thermafleece is made from Sheeps Wool
- Thermafleece naturally has highly efficient thermal and sound insulating qualities
- Thermafleece Slab PB20 - PB 570 100 is used for loft insulation
- Thermafleece has a Thermal conductivity of 0.038 W/mK
Code for Sustainable Homes Credits
Thermafleece can contribute towards gaining your:-
- Building fabric (Ene2) Code for Sustainable Homes credits
- Global Warming Potential (GWP) of Insulants (Pol1) Code for Sustainable Homes credits
*when used and incorporated into appropriate systems. Site and systems specific
Thermafleece
- Thermafleece PB20 is as a lower density, compressed roll insulation that is easy to handle and install in confined spaces such as lofts.
- Thermafleece PB20 contains a lower quant ity of wool than Thermafleece (60% compared to 85%). Because Thermafleece PB20 is compress packed, it is necessary to incorporate a proportion of recycled polyester fibres to ensure the insulation regains its full thickness when un-rolled. Compressing the rolls by approximately 60% significantly reduces the impact of transporting the finished product and nearly halves the required storage space for the same volume of insulation.
- Manufactured to meet the highest quality and performance standards and using British sheep’s wool, Thermafleece is the only wool based insulation to hold BBA certification.
- Thermafleece has a thermal conductivity of 0.038 W/mK and is available in a variety of dimensions suitable for all your application needs.
- Thermafleece utilises hollow wool fibres, blended to an optimum density producing first-class thermal and acoustic performance in buildings whilst minimising impact on the environment. Manufactured in the UK using British sheep’s wool, Thermafleece meets the highest quality and performance standards and is the only wool based insulation to hold BBA certification.
Why Insulate with Thermafleece?
Insulating a property will significantly reduce the amount of energy lost from the building envelope, reducing energy consumption and carbon dioxide released to the atmosphere. Wool is a sustainable and functional complex fibre with unparalleled insulating properties, designed by nature to insulate sheep in the harshest of environments, making wool the ideal natural fibre to use in thermal insulation.
First-class performance
Not only does Thermafleece provide excellent thermal insulation in a wide variety of constructions, it can be used in many acoustic applications. Thermafleece acts in sympathy with your property absorbing many indoor air pollutants and helping control humidity levels.

Long lasting
In order to ensure consistent thermal performance, it is important that insulation retains its shape throughout its service life. Thermafleece contains a lofting agent to maintain fibre stability and ensure the insulation batts maintain structural integrity throughout their lifetime. The manufacturing process ensures that each insulation batt is composed of a random matrix of wool fibres that will not split or delaminate in service.
Certified
Thermafleece is the only wool insulation to be certified by the British Board of Agremént (BBA). Certification by the BBA ensures Thermafleece is manufactured and performs to a rigorous set of standards. The certification covers installation between joists in ventilated and unventilated lofts; under pitched roofs and between rafters for tiled or slated pitched roofs, as well as timber frame wall applications between studding with a weather resistant cladding, and a ventilated and drained cavity. Environmental Excellence Using Thermafleece can reduce carbon emissions by many tones over the lifetime of use. Moreover, wool fibres fix carbon dioxide from the atmosphere helping reduce atmospheric greenhouse gas levels and making Thermafleece one of the most sustainable building materials currently available.
Safe
Thermafleece is safe to handle without the need for personal protective equipment.

Thermafleece Product Brochures
Second Nature UK Product Range
Thermafleece Application Guides
Loft Insulation Application Notes
Room in a Roof Application Notes
Timber Frame Application Notes
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