Home / Real cases / C Watkins Plumbing Limited

PHW · Construction and civils · 2026-10-29

C Watkins Plumbing Limited fined £20,000 after sparks from welding ignited uncovered foam insulation on the roof of an apartment building under construction, and four subcontractors had to escape through a single opening and down a ladder

Staines-upon-Thames, Surrey · Staines Magistrates' Court

What happened

On 26 June 2024, four subcontractors working under the company's control were installing an air source heat pump on the roof of a 14-storey apartment building under construction. Sparks from welding ignited uncovered rigid foam insulation and the fire spread across the roof space. The workers escaped through a single opening and down a ladder to Level 14, with no other exit, no means of raising the alarm and no fire extinguishers.

Injuries: The four workers escaped and no injuries are reported on the page.

The breach

Regulation 15(2) of the Construction (Design and Management) Regulations 2015

The sentence

  • Fine: £20,000
  • Costs: £8,270
HSE inspector

“Watkins failed to follow its own procedures for hot works.”

What would have prevented it

Before any welding or other hot work, carry out a risk assessment and method statement, issue a permit to work, cover combustible insulation and make sure there is more than one way out and a way to raise the alarm.

How PHW helps

The machines, packs and quizzes that fit this kind of site.

Sector

Mini plant and Stihl saws: show who is trained, on the day

View →
Safety pack

Working at height

View →
Quiz

Who is allowed to run your plant, and where is it written down?

View →

Source: HSE press release, PICTURED: Aftermath of apartment roof blaze workers 'lucky to escape' from