°Ç¸ç³Ô¹Ï

Skip to main content
Research and analysis

Gathering evidence to improve airtightness in the UK housing stock

This research gathered evidence on the baseline airtightness of the UK housing stock, to support domestic retrofit policy and modelling tools.

From:
Department for Energy Security and Net Zero
Published:
1 October 2025

Documents

Ref: 2025/002

PDF, 1.3 MB, 84 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email alt.formats@energysecurity.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Ref: 2025/002

PDF, 1.21 MB, 56 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email alt.formats@energysecurity.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Ref: 2025/002

PDF, 771 KB, 79 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email alt.formats@energysecurity.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Ref: 2025/002

PDF, 436 KB, 37 pages

This file may not be suitable for users of assistive technology.

Request an accessible format.
If you use assistive technology (such as a screen reader) and need a version of this document in a more accessible format, please email alt.formats@energysecurity.gov.uk. Please tell us what format you need. It will help us if you say what assistive technology you use.

Details

Understanding airtightness is important for minimising heat loss through uncontrolled air exchange between the inside and outside of a building, and good airtightness plays an important role in achieving low energy, comfortable homes.

This research was designed to gather evidence on the airtightness of the UK housing stock, and support energy efficiency policy, including the Standard Assessment Procedure (SAP) and the development of its successor the Home Energy Model (HEM).

Updates to this page

Published 1 October 2025

Sign up for emails or print this page

Related content