Primary Research

Ageing and airtightness: how dwelling air permeability changes over time

Download Report (PDF, 1.44mb)

Testing how air permeability changes

In response to suggestions that new homes become leakier as they age because of shrinkage and settlement and that this provides additional adventitious ventilation, this research subjected a small number of dwellings to re-testing one to three years after completion to establish how their air permeability had changed.

As the sample size was limited, this research was intended only to provide an indication of the performance.

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