Technical Specification
Thermal Performance
Thermafleece PB20 is manufactured using state of the art techniques to produce a tightly bound random matrix of hollow wool fibres and recycled polyester with a large internal surface area that ensures the finished insulation has excellent thermal insulating properties.
Thermafleece PB20 has a nominal density of 20kg/m3 and a thermal conductivity of 0.039 W/mK which is better than most equivalent conventional insulation.
Acoustic Performance
Thermafleece PB20 can be used in many applications outlined in Approved Document E, contributing to the reduction in the passage of sound in structures in line with current UK Building Regulations and Robust Details.
As part of the overall sound reduction measures the use of an appropriate absorbent material such as Thermafleece PB20 to fill wall voids will make a valuable contribution towards passing required acoustic tests under the regulations.
Moisture and Temperature Control
The hygroscopic nature of wool fibres means that Thermafleece PB20 can act in sympathy with buildings to control internal moisture levels and contribute to a more stable and comfortable indoor environment.
When the wool in Thermafleece PB20 encounters moisture it is capable of releasing and absorbing heat. Wool releases heat when absorbs moisture and absorbs heat when it releases moisture which can have a stabilising influence over air temperature.
Fire Resistance
Thermafleece PB20 is treated with a low level of borate fireproofing agent to improve its intrinsic fire resistance and comply with BS 5803-4 achieving results of zero for ignitability, spread of flame.
Technical Data
