Thermal bypass
Heritage Building Retrofit Toolkit, published by the City of London Corporation in March 2024, defines thermal bypass as: ‘Heat loss that bypasses the thermal insulation layer between two areas of the construction. This is caused by a combination of conductive and radiative heat loss mechanisms which result in uncontrolled air movement.’
See also: Thermal bridge.
[edit] Related articles on Designing Buildings
- Definitions of retrofitting.
- Fabric first.
- Heritage.
- How to deal with retrofit risks.
- LETI publishes Climate Emergency Retrofit Guide.
- National Retrofit Strategy NRS.
- Renovation v refurbishment v retrofit.
- Retrofit.
- Retrofit and traditional approaches to comfort.
- Shallow retrofit.
- Step-by-step retrofit.
- Thermal bridge.
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
Leaders in Learning for Practice Network
Call for conservation leaders in learning to register interest in new network.
The importance of early engagement
Construction lessons from the Trillium HealthWorks Experience Centre.
Mayors are to be given planning call in powers
Mayors across England will be able to make the most important planning decisions.
The Master Builder: William Butterfield and his times. Book review.
Why construction can't afford to ignore the skills gap.
Building Safety Regulator, 19 August
Gill Kernick appointed Independent Chair of Residents’ Panel.
Connecting knowledge, technology and conservation
Building competence for the future of built heritage.
Building Regulations and Building Safety Act
CIOB publishes free advice for non-domestic clients.
Building Safety Newsletter from MHCLG.
An extraordinary record of steel engineering worldwide.
Households living near new pylons to save on bills.
ECA warns growth must not outpace grid capacity or skills.

















