Risk of overheating in buildings
It is far from unusual to see reports referring to London’s overheating property market, although not in quite the literal way that a new Whitepaper by WSP | Parsons Brinckerhoff highlights.
‘Overheating in Homes: Keeping a growing population cool in summer’, published in October 2015 recommends that new measures are introduced, overhauling the building regulations, in order to tackle a problem that, as cities become hotter in the future, only looks set to worsen.
The report has built upon a ComRes survey commissioned by WSP PB published the previous month. The survey found that four out of five (83%) of Londoners suffered from overheating in their home on at least one occasion during this year’s summer. The survey also found that almost a third (31%) of those who suffered from overheating at night felt tired or unwell the following day.
Despite being better at protecting from the cold in winter, the report found that new-build homes, and in particular flats, were less successful in alleviating overheating than older homes.
Overheating has become an emerging issue due to factors including climate change, susceptibility to heat amongst an ageing population, insulation, air-tight construction, and the ‘urban heat island’ effect where metropolitan areas experience warmer temperatures than surrounding rural areas. Government figures show that around 2,000 deaths a year are attributable to heat.
According to the report, there is ‘overwhelming agreement’ that the Standard Assessment Procedure (SAP) is ‘inadequate’ at measuring the risk of overheating. The following steps are proposed to try and tackle the issue of overheating:
- A new, robust regulatory overheating analysis method for all new developments.
- Requirement for new housing developments to adhere to a ‘cooling hierarchy’ to assess the most relevant measure to combat overheating.
- Requirement for new buildings to be designed to facilitate retrofitted cooling installations.
- The introduction of measures on a development and city-wide basis for reducing the urban heat island effect, including green infrastructure and ‘cool pavements’.
- Measures to move towards an ‘all-electric city’ that will lead to a reduction in heat production from all vehicles and buildings in urban areas and will also reduce noise pollution, enabling people to open windows and so benefit from natural ventilation.
Author of the report Barny Evans, associate at WSP | Parsons Brinckerhoff, said: “Even as winter approaches overheating needs direct action. Current regulations rightly focus on stopping us feeling the cold, but we have yet to find the right solution to uncomfortably hot homes.
"This represents an opportunity to build better, more sustainable and ultimately more desirable homes. An increase in population and densification of our cities means we are more likely to live in flats in future, so we need to understand how to build these homes so that they are comfortable for residents now and in the future.”
Responding to the report, Association for the Conservation of Energy director Joanne Wade said: “Overheating isn’t a main issue now but will be increasingly important with climate change. The key thing is ventilation as well as insulation. We need to improve the quality of our building stock by making it properly insulated and properly ventilated.”
Featured articles and news
Deputy editor of AT, Tim Fraser, discusses the newly formed society with its current chair, Chris Halligan MCIAT.
Barratt Lo-E passivhaus standard homes planned enmasse
With an initial 728 Lo-E homes across two sites and many more planned for the future.
Government urged to uphold Warm Homes commitment
ECA and industry bodies write to Government concerning its 13.2 billion Warm Homes manifesto commitment.
Places of Worship in Britain and Ireland, 1929-1990. Book review.
The emancipation of women in art.
CIOB Construction Manager of the Year 2025
Just one of the winners at the CIOB Awards 2025.
Call for independent National Grenfell oversight mechanism
MHCLG share findings of Building Safety Inquiry in letter to Secretary of State and Minister for Building Safety.
The Architectural Technology Awards
AT Awards now open for this the sixth decade of CIAT.
50th Golden anniversary ECA Edmundson awards
Deadline for submissions Friday 30 May 2025.
The benefits of precast, off-site foundation systems
Top ten benefits of this notable innovation.
Encouraging individuals to take action saving water at home, work, and in their communities.
Takes a community to support mental health and wellbeing
The why of becoming a Mental Health Instructor explained.
Mental health awareness week 13-18 May
The theme is communities, they can provide a sense of belonging, safety, support in hard times, and a sense purpose.
Mental health support on the rise but workers still struggling
CIOB Understanding Mental Health in the Built Environment 2025 shows.
Design and construction material libraries
Material, sample, product or detail libraries a key component of any architectural design practice.
Construction Products Reform Green Paper and Consultation
Still time to respond as consultation closes on 21 May 2025.
Resilient façade systems for smog reduction in Shanghai
A technical approach using computer simulation and analysis of solar radiation, wind patterns, and ventilation.