Trisomet® 120 mm composite roof panels (540 m2) and Trisomet® 80 mm composite wall panels (370 m2) from Tata Steel were specified for Western Power Distribution Depot in Spilsby, Lincolnshire.

Western Power Distribution (WPD) depot achieved a BREEAM Outstanding rating of 101.9%, post completion, making it the world’s highest rated BREEAM project at the time. Contributing to the rating was the long-lasting, air-tight envelope constructed from Trisomet® composite panels with its energy efficient liner.

The enhanced U value specification of these panels reduces the heat energy conduction losses through the building envelope by 7.5% compared with the notional building specification.

Both systems feature a Colorcoat HPS200 Ultra® pre-finished steel (Goosewing Grey) external weather face and Colorcoat® High Reflect (Bright White) internal liner. The Colorcoat® High Reflect provides light energy savings of up to 12% due to its enhanced reflectivity when compared with a standard liner.

“WPD wanted a long-lasting, air-tight envelope to help reduce the operating costs of the building” says B3 Architects’ Michael Cooper, “and so we specified Trisomet® composite panels for the roof and walls. As well as being robust, quick to fit and cost-effective, the panels have a PIR core which provides the desired high level of insulation which greatly contributes to the BREEAM Outstanding rating.”

WPD’s Estates Manager, David Withers said, “We are delighted that the depot has achieved an outstanding rating which recognises our drive for sustainability and for providing colleagues with a first class working environment.”