Dear Tony
19th June 2012

We read with interest emails over the last few weeks in The Glazine welcoming the publication of the latest Approved Conductivity Values for spacer bars recently published by BFRC.

BFRC is pleased to be able to supply the window industry with clarity about this highly technical issue and provide a level playing field for all manufacturers and suppliers in this sector.

However, BFRC wants to stress that a determination of a spacer's thermal properties is a very complex field. A material's thermal conductivity is not the only factor that affects the thermal performance of a spacer bar.
Other elements, such as geometry, wall thickness and vapour barrier thickness also play a major part.

Anyone needing further information on this can contact BFRC direct (email
enquiries@bfrc.org or telephone 020 7403 9200) or a Certified Simulator (a list of which can be found on www.bfrc.org, in the trade section) for further guidance and assistance.

Yours sincerely

Chris Mayne

General Manager, BFRC