Primary Research

Review of co-heating test methodologies

Download Report (PDF, 4.2mb)

The co-heating test

The co-heating test has been developed to assess the amount of heat that leaks through the thermal envelope of a building – the ground floor, walls, roofs and windows, etc. It is currently the only test available for assessing whole buildings and providing a measure of as-built performance. This report shows results from a programme of work designed to evaluate the reproducibility of the co-heating test. Tests were carried out on a single house by the seven separate test organisations which partnered on this project. Results varied considerably, suggesting that more work was needed to ensure that the test was an accurate predictor of as-build performance. The work considered some effects which may be contributing to the variation in test result and how these might be controlled.

Download the report

Explore NHBC Foundation

NHBC Foundation Research

Delivering high-quality research and guidance to help the house-building industry address the challenges of delivering 21st-century new homes

Learn more

Access NHBC Foundation Publications

Access and download NHBC Foundation’s full portfolio of publications and practical guides, covering primary research, research reviews and documents informing the debate

View all publications

Latest NHBC Foundation News

View the latest NHBC Foundation news, articles and Foundation facts showcasing the most recent publications and reporting on progress with new research projects

NHBC Foundation news