APM Survey Finds 99% of Project Managers Affected by Heatwaves

Extreme Weather Disrupts UK Construction Output

A new survey conducted for the Association for Project Management (APM) reveals that 99% of project managers have seen their projects impacted by heatwaves. Furthermore, 62% of respondents stated that their site operations and schedules were significantly affected by severe high temperatures.

Extreme heat presents serious operational challenges for the UK construction sector. Higher temperatures force site managers to alter shift patterns, increase mandatory rest breaks, and implement stricter hydration and shade protocols to prevent heat-related illnesses among workers. Beyond labor health, high temperatures also affect material performance, accelerating the drying times of concrete, mortars, and renders, which can compromise structural integrity if not managed correctly.

What it Means for Sourcing and Purchasing

What does this mean for a UK tradesperson or DIYer actually buying this kit — does it change what they should pay, buy, or watch out for?

While this report does not alter the retail shelf price of standard hand tools or fixings, it directly impacts job scheduling and material consumption on site. Tradespeople buying fast-setting mortars, plasters, or chemical anchors must factor in drastically reduced working times during warm weather spells, potentially requiring the purchase of temperature-retarding additives or specialized hot-weather formulations. Expect potential supply chain delays on large-scale building materials when prolonged heatwaves disrupt primary production and site deliveries. DIYers and sole traders should budget for extra hydration equipment, shade canopies, and lighter, high-visibility summer workwear to maintain safe working conditions during peak summer months.

Adapting Site Planning for Summer Conditions

The practical takeaway for contractors, subcontractors, and self-employed tradespeople is to integrate weather contingency plans into early project quotes and timelines. Subcontractors should ensure their health and safety risk assessments account for thermal comfort and UV exposure, adjusting working hours to cooler early-morning slots where possible to keep projects on track without compromising safety.

Reported by Construction Management — original article