Glazing solutions to meet Part L

The Part L Approved Documents of the Building Regulations for England and Wales have been issued, coming into force on 1st October 2010.  New buildings will have to be at least 25% more efficient than current new buildings.

For replacement windows, the requirements for Window Energy Ratings and window U values have been tightened.  Greater restrictions are placed on the centre pane U value compliance route. The benefit of supplementing existing single glazing with low-e secondary glazing has also been recognised. 

Energy efficient glazing such as Pilkington K Glass™ and Pilkington energiKare™ are well placed to satisfy these requirements. For non-dwellings, there will be a greater focus on limiting solar gains in the summer, increasing opportunities for high performance solar control glass such as Pilkington Suncool™ and Pilkington Eclipse Advantage™. 

Further information

For more information on Part L, or our range of products, please contact our Technical Advice Centre (email us at or phone on 01744 692000).