Thermafleece Technical Data

BBA Brochure
BBA_Brochure.pdf
(355.4 KB)

Thermafleece is the only British wool insulation to be BBA certified - (02/3950). Meaning that it totally complies with Building Regulations, in 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.

The low thermal conductivity of Thermafleece (0.039 W/m.K.) compares favourably with that of other fibrous insulants.

A lofting agent is required to ensure that the insulation maintains its shape and entraps air throughout its service life. Currently there are no natural materials available that can do this, so we use a lofting agent composed of polyester. Every effort has been taken to ensure that the virgin polyester content of the product is kept to a minimum. Thermafleece contains 7.5% recycled polyester and 7.5% virgin polyester.

Thermafleece is manufactured in batts full details are shown below.

Batt Dimensions	Batts Per Pack	Square Metre per Pack
50 x 400 x 1200	42	20.16
50 x 600 x 1200	28	20.16
75 x 400 x 1200	27	12.96
75 x 600 x 1200	18	12.96
100 x 400 x 1200	21	10.08
100 x 600 x 1200	14	10.08

Technical Sales Service and Backup

Second Nature UK Ltd is pleased to provide technical advice on how to incorporate Thermafleece into different forms of constructions, for both refurbishment and new build projects.

We offer:

A technical sales office helpline 0844 8009953.
Computer U value and Condensation Risk Analysis calculations.
Copies of the relevant reports and samples.
Help and advice on meeting the requirements of meeting Building Regulations.

Recommendations as to methods, use of materials and construction details are based on the experience and knowledge of Second Nature UK Ltd and are given in good faith as a general guide and a service to designers, contractors and manufacturers.

Fire Resistance

Wool has a higher fire resistance than cellulose and cellular plastic insulants; it does not burn but rather melts away from an ignition source and extinguishes itself. Thermafleece is treated with a natural fireproofing agent to improve its intrinsic fire resistance and comply with BS 5803-4 (Spread of Fire) achieving results of zero for ignitability, spread of flame and heat evolved.

BBA Certification

Thermafleece is BBA Certified. The BBA is the UK's major approval body for new construction products and installers. Agrément Certificates are recognised by specifiers and other industry decision-makers as proof that the products covered by them have been rigorously assessed, will allow compliance with Building Regulations to be achieved and will last for a defined period.
BBA Brochure
BBA_Brochure.pdf
(355.4 KB)