A hot works permit must be obtained before any task that produces heat, sparks, or open flame on a construction site. This includes welding, cutting, grinding, brazing, soldering, and the use of bitumen torches. The permit system ensures that the work area is inspected, combustible materials are removed, fire extinguishers are available, and a fire watch is maintained. Failure to follow the hot works permit process is the leading cause of construction site fires in the UK.
Key Hazards
Fire from sparks igniting combustible materials above, below, or behind the work area
Incomplete permits allowing hot works without adequate fire safety controls
Fire watch periods being cut short or skipped after hot works are completed
Permits not updated when work location or conditions change during the shift
Control Measures
Obtain a signed hot works permit from the authorised issuer before starting any hot work activity.
Inspect the work area and remove all combustible materials within a minimum radius of 10 metres.
Check the area above, below, behind, and on both sides of the work position for hidden combustibles.
Position a fire extinguisher suitable for the fire types present within immediate reach of the worker.
Ensure the operative carrying out the hot works has read and understands all permit conditions.
Appoint a dedicated fire watch person to monitor the area during and after the hot works.
Maintain the fire watch for a minimum of 60 minutes after all hot works activity has ceased.
Display the permit at the hot works location so it is visible to all workers in the vicinity.
Close out the permit formally with the issuing authority when the fire watch period is complete.
Remember
A hot works permit is required for every task producing heat, sparks, or open flame without exception.
Check above, below, behind, and to both sides of your work position for hidden combustible materials.
The fire watch must continue for at least 60 minutes after hot works are completed on every occasion.
Construction site fires caused by hot works have resulted in total building losses worth millions of pounds.
The permit must be displayed at the work location and all conditions followed throughout the task.
If the work location changes during the shift, a new permit must be obtained for the new position.
Applicable Legislation: Regulatory Reform (Fire Safety) Order 2005 · Health and Safety at Work etc. Act 1974 · CDM Regulations 2015 · Joint Code of Practice for Fire Prevention on Construction Sites