UK Schools Overheat as Poor Design Traps Heat
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- Retrofit Action for Tomorrow surveyed 80 schools across England, finding 68% reported overheating and more than a quarter described it as "significant."
- Harry Paticas says teachers have reported pupils fainting or vomiting in class, with schools closing and exams cancelled due to heat, calling it a critical safeguarding issue.
- Single-glazed windows let up to 37% more heat into a building than double glazing, while modern safety restrictors seal windows shut and post-2000s glass atriums create greenhouse-like conditions.
- Tarmac playgrounds can reach up to 60C during heatwaves according to research at a school in Catford, south London, absorbing and retaining heat where children play.
- Victorian school buildings were originally designed with passive cooling — tall sash windows that opened top and bottom, external shutters and awnings — features later stripped away through refurbishment and changing safety rules.
- The Department for Education's new 10-year modernisation strategy signals a shift toward retrofit and resilient learning environments, though Paticas argues national-scale investment is still needed.
Why it matters: With 68% of 80 English schools already reporting overheating and one recording temperatures above 40C, the source documents a safeguarding and learning-quality crisis: heat raises task-completion times, increases errors, and lowers cognitive performance and test results. The DfE's 10-year modernisation strategy has been launched but, as Paticas argues, tactical fixes like external shading, stack ventilation, and tree planting must scale into a national retrofit programme before schools can keep children safe and learning through worsening heatwaves.
