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A Window Energy Rating (WER) is measurement and category for the efficiency of a window system as a whole. It considers the frame, the centre pane U value, the solar transmission of the glass, the effect of the spacer around the edge of an insulating glass unit and the air permeability of the window.

We do make active use of recycled glass, referred to as cullet, in our processes to improve our environmental performance. Internal and pre consumer cullet consists of broken glass generated from edge trimmings and off specification product.

By the nature of the toughening process it is not possible to produce toughened glass as flat as annealed glass. Two types of deviation, known as overall bow and roller wave, can be produced. Overall bow may vary dependent upon the glass type/ thickness, size, aspect ratio and other factors.

Pilkington United Kingdom Limited, part of the NSG Group, is making a multi-million-pound investment in its Merseyside facilities as part of a government-backed project that will save 15,000 tonnes of carbon emissions each year while securing the future of rolled glass manufacturing in the UK.

Published on 15 th December 2021 and coming into force on 15 th June 2022, the government has set out its new requirements for Part L (conservation of fuel and power) of the Building Regulations and the supporting Approved Document for new non-dwellings in England.

Heat loss is normally measured by the thermal transmittance or U value, usually expressed in W/m 2 K. In its most basic terms, the lower the U value, the greater the thermal insulation. U values for insulating glass units are determined in accordance with BS EN 673.

We manufacture, process and distribute glass in the UK under the Pilkington brand name, using the most advanced glass and coating technology. We offer a wide range of innovative flat glass solutions for the construction industry.

Pilkington Spectrum is a Windows-based glass performance model which enables you to quickly and efficiently calculate key properties of insulating glass units without the need to construct and measure them. You can use Pilkington Spectrum to provide the following information: Pilkington Spectrum has been independently verified by TuV Rheinland!

To download the ISO 9001 and 14001 certificates, please click on the following links: ISO 9001:2015 - Quality Management System. Valid until 28 th May 2025. ISO 14001:2015 - Environmental Management. Valid until 28 th May 2025.