Confined Space Entry Permits: How They Work

When entry into a confined space cannot be avoided, the law requires a safe system of work. In practice, the centrepiece of that system is usually a permit-to-work — a formal, written authorisation that confirms the space has been assessed, the hazards controlled, and every precaution put in place before anyone goes in.

This article explains what an entry permit is for, what it should contain, and how it fits into the wider duties placed on Irish employers.

Why a permit-to-work exists

A permit-to-work is not bureaucracy for its own sake. It is a disciplined check that nothing has been overlooked. Under the Safety, Health and Welfare at Work (General Application) Regulations 2007, Part 3an employer must establish a safe system of work where confined space entry is unavoidable. The permit gives that system structure: it forces a deliberate, recorded decision before entry rather than a casual "in you go".

A permit-to-work converts a verbal "should be fine" into a written, signed confirmation that it actually is.

The permit also creates accountability. Someone competent has to authorise the work, the entrants have to acknowledge the controls, and the document records who was responsible for what.

What a confined space entry permit should cover

While the exact format varies between sites, a sound entry permit typically captures:

• The specific location and a clear description of the confined space.
• The task to be carried out and how long it is expected to take.
• The hazards identified by the risk assessment and the controls in place.
• Atmospheric testing results for oxygen, flammable gases and toxic substances, taken before and, where needed, during entry.
• Isolation of pipes, services and machinery that could introduce a hazard.
• Ventilation arrangements.
• Equipment required, including breathing apparatus, harnesses and communications.
• Emergency and rescue arrangements, including the standby person outside.
• Names and signatures of the authorising person and the entrants, plus a defined time limit.

Crucially, a permit is time-limited. It applies to a specific job for a defined period and must be cancelled and reissued if conditions change.

The permit is only as good as the assessment behind it

A permit does not create safety on its own — it records the controls that a thorough risk assessment has already identified. That assessment is required under section 19 of the Safety, Health and Welfare at Work Act 2005, and the arrangements should be reflected in the workplace safety statement under section 20. If the assessment is weak, no amount of paperwork will make the entry safe.

Who issues and signs the permit?

The permit should be authorised by a competent person who understands the hazards and the controls, and who is not the same person rushing to get the job done. The entrants sign to confirm they understand the controls and will follow them. When the work is complete or the time expires, the permit is formally closed, confirming that everyone is out and the space is secured.

Make the system second nature

Permits work only when everyone involved understands the why as well as the how. Training ensures authorisers, entrants and standby personnel know their roles, recognise when a permit must be stopped, and treat the document as a live safety control rather than a form to be signed in a hurry. Backed by competent people and a strong assessment, the permit-to-work becomes one of the most effective safeguards a workplace has.