Approved Document L - Jeremy Dunn Explains
Jeremy Dunn, Glazing Vision’s Technical Director, answers some of the questions we often receive about Approved Document L and the most recent changes.
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APPROVED DOCUMENT L AND ROOFLIGHTS - A SPECIFIER'S GUIDE
In 2021, changes were made to Building Regulations: Approved Document L – Conservation of Fuel and Power which affects building work on both new and existing buildings in England from 15th June 2022.
In the shift towards a Future Buildings Standard planned to come into effect in 2025, the government announced a number of changes to the Building Regulations to help the UK deliver net zero, including a mandatory 30% cut in carbon for all new homes, and a 27% cut for other buildings, including offices and shops. These changes have meant necessary amendments have had to be made to the Approved Document.
This guide focuses on the requirements for rooflights and roof windows in relation to Approved Document L in dwellings and buildings other than dwellings, and covers:
VOLUME 1 – DWELLINGS: ROOFLIGHTS AND ROOF WINDOWS
- Calculating the target primary energy rate, target emission rate and target fabric energy
efficiency rate in dwellings - Limiting heat gains and losses in rooflights and roof windows in dwellings
- New rooflights and roof windows in existing dwellings, including extensions
- Work to rooflights and roof windows in existing dwellings
VOLUME 2 – BUILDINGS OTHER THAN DWELLINGS: ROOFLIGHTS AND ROOF WINDOWS
- Calculating the target primary energy rate and target emission rate in buildings other than dwellings
- Limiting heat gains and losses in rooflights and roof windows in buildings other than dwellings
- New rooflights and roof windows in existing buildings, including extensions
- Work to rooflights and roof windows in existing buildings
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FREE PART L GUIDE
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Why do need this? - Additional Information
By providing this information, it allows us to forward your enquiry on to your local Technical Specification Manager and enables them to provide you with a formal quotation quicker.