New and improved U-value service

bwfThe British Woodworking Federation (BWF) has re-launched its basic U-value calculation service to bring it in line with the Construction Products Regulation (CPR).

The CPR’s introduction on 1 July 2013 means that businesses with 10 staff or more, or with a turnover of €2million or more – known as small and medium enterprises (SMEs) – are required to have their U-value calculations validated by a notified body.

The BWF has teamed up with notified body, the British Board of Agrément (BBA), to ensure that all calculations supplied by the BWF can be validated for SMEs to be compliant with the CPR.

Chris Addison, BWF technical officer, who runs the BWF’s basic U-value calculation service, said: “Approval of our U-value calculations by the BBA means that joinery firms can be confident that their windows comply with the Building Regulations, can secure compliance in a cost effective manner – and of course – be used for CE marking purposes.

,“We work with each company to get their window to the required U-value and then issue them with a certificate, which they can use to prove compliance for Building Control, clients, and use to promote their products’ performance.”

‘Micro enterprises’ with nine or fewer employees still do not require notified body validation for U-values, but are still required to provide a U-value for Building Control approval. The BWF’s basic U-value calculation service is also available for micro enterprises to access.

For more information and to apply for the new BWF basic U-value calculation service, visit

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