England · Statutory guidance
Conservation of fuel and power: Approved Document L, Volume 2 — Buildings other than dwellings
Energy performance guidance for non-domestic buildings, covering fabric, services, controls and commissioning.
- Edition
- 2021 edition incorporating 2023 amendments · Volume 2; later editions and transitions on source page
- Search coverage
- 116 of 116 PDF pages · 2 OCR pages
Energy & sustainability
Open original PDF at page 34 Source wording and page order preserved. Drawings and table layouts remain available in the original PDF.
L1(a) O N L I N E V E R S I O N
Limiting standards for new or replacement elements
4.5 New fabric elements should meet the limiting standards in Table 4.1. This includes all of the following.
a. Elements in new buildings.
b. New elements in extensions to existing buildings.
c. New or replacement elements in existing buildings.
Guidance on when a new or replacement element in an existing building must meet the requirements
in this table is given in Section 10.
4.6 If windows or fully glazed pedestrian doors cannot meet the requirements of Table 4.1 in an
existing building because of the need to maintain the character of the building, either of the
following should be met.
a. These fittings should not exceed a centre pane U-value of 1.2W/(m2·K).
b. Single glazing should be supplemented with low-emissivity secondary glazing.
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Approved Document L Volume 2, 2021 edition Building Regulations 2010
O N L I N E V E R S I O N
Edition and local adoption determine which requirements apply. Use the publisher’s document for the complete clauses, diagrams and amendments.