Nail Gun Safety

OBR Construction — Mandatory Health & Safety Module

~25 minDuration

10Questions

75%Pass Mark

12 MonthsCertificate Validity

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! Why This Training Matters

Nail guns are powerful, fast, and extremely useful on construction sites — but they are also one of the most dangerous hand-held tools in the industry. In the UK, nail gun injuries send thousands of workers to hospital every year. Nails can penetrate deeply into hands, feet, and other body parts in a fraction of a second, often without the user realising what has happened.

This training covers the safe use of nail guns — in particular cordless gas-powered nailers such as the Paslode range — including tool operation, fuel cell and battery handling, PPE requirements, maintenance, and what to do in an emergency.

Note: This course covers awareness for all OBR operatives who may use or work near nail guns. Specific tool familiarisation must also be completed using the manufacturer instructions for each tool type used on site.

1 Types of Nail Guns and How They Work

Different nail gun types are used in construction. Understanding how each works is essential for safe use.

Cordless Gas-Powered (e.g. Paslode)

Uses a fuel cell (gas canister) and battery-powered ignition to fire nails. No compressor or air hose required. Highly portable — widely used on OBR sites for timber framing, decking, and structural work. The fuel cell must be the correct type for the tool.

Pneumatic (Air-Powered)

Connected to a compressed air supply via a hose. High power and fast. Risk of accidental discharge from the air hose as well as the tool. Air hose connections must be checked before use.

Cordless Battery-Powered

Electrically driven. No fuel cell required. Quieter than gas-powered tools. Battery charge must be checked before use. Damage to lithium batteries can cause fire risk.

How Nail Guns Fire

Most nail guns have two safety mechanisms that must both be activated to fire: the trigger AND the nose contact (tip safety). Both must be depressed simultaneously. Understanding this prevents accidental firing.

Key hazard: Nail guns can fire a nail with enough force to penetrate timber, concrete block, steel, and human bone. A nail can travel through the workpiece and injure someone on the other side. Always check what is behind the work surface before nailing.

2 Fuel Cells and Batteries (Gas-Powered Tools)

Gas-powered nailers such as the Paslode range require a fuel cell (gas canister) and a charged battery to operate. Both must be handled and stored correctly.

Fuel cells — safe handling and storage:

Always use the correct fuel cell for the tool — check the manufacturer specification. Using the wrong fuel cell can cause tool malfunction or fire
Insert the fuel cell with the tool pointing away from you and others
Never puncture, crush, or incinerate fuel cells — they are pressurised flammable gas
Store fuel cells upright in a cool, dry location away from ignition sources and direct sunlight
Do not store fuel cells in vehicles in hot weather — heat increases internal pressure
Dispose of used fuel cells correctly — as pressurised flammable waste, not general waste
If a fuel cell is leaking, remove it immediately in a ventilated area and keep away from ignition sources

Battery Safety

Use only the manufacturer-approved battery for the tool
Check the battery is fully charged before starting work
Never use a damaged, swollen, or leaking battery
Do not expose batteries to water or extreme heat
Charge batteries in a ventilated area away from flammables

Fuel Cell Quantities on Site

Fuel cells are classified as flammable gas. The quantity stored on site must comply with the site fire plan. Excess stock must be kept in a designated flammable materials storage area — not left in the work area or in site cabins.

Fire risk: Fuel cells contain liquefied flammable gas. Never use or store near open flames, hot work areas, or sources of ignition. If a fire breaks out near stored fuel cells, evacuate the area immediately and call 999.

3 Safe Operation of Nail Guns

The majority of nail gun injuries are caused by unsafe working practices, not tool malfunction. Following the correct operating procedure every time eliminates most of the risk.

Before use — pre-use checks:

Inspect the tool — check for damage, blockages, and that all guards are in place
Check the correct nails are loaded — wrong nail type or length can cause misfires
Check the fuel cell and battery are correctly fitted and have sufficient charge/gas
Test the nose contact (tip safety) — it should spring back when released
Never use a tool with a defective tip safety or trigger mechanism

During use — safe working practices:

Keep fingers away from the nose of the tool at all times
Never bypass or disable the tip safety or trigger safety
Never point the tool at yourself or others — treat it as you would a firearm
Check what is behind the workpiece before nailing — nails can pass through and injure bystanders
Keep bystanders at a safe distance — minimum 2 metres
Never carry the tool with your finger on the trigger
On scaffolding or at height — secure the tool with a lanyard to prevent it falling

Double fire / bump fire: Some nail guns have a sequential fire mode and a contact (bump) fire mode. Contact fire mode is faster but significantly more dangerous — the tool will fire every time the nose contacts a surface. OBR Construction policy is to use sequential fire mode only unless specifically authorised by a supervisor.

4 PPE Requirements

The following PPE is mandatory when using or working near nail guns on OBR sites. PPE must be worn for the entire duration of nail gun use — not just when actively firing.

Safety Glasses or Goggles

Flying fragments, broken nails, and wood splinters are common when nailing. Safety glasses (EN 166) are the minimum — goggles provide better protection when working overhead or at unusual angles. Standard prescription glasses are not adequate.

Hearing Protection

Gas-powered nailers produce a loud report each time they fire. Prolonged use without hearing protection causes permanent hearing damage. Ear defenders or earplugs rated for the noise level must be worn during sustained use.

Safety Boots

Steel or composite toe cap boots (EN ISO 20345) are mandatory. Foot injuries from dropped tools and misfired nails are common. Anti-penetration midsoles (S1P/S3) are recommended where nails may fall or ricochet onto the floor.

Gloves

Wear cut-resistant gloves when handling nails and loading the tool. However, avoid bulky gloves when operating the trigger — they can reduce sensitivity and increase the risk of accidental activation. Use close-fitting gloves only.

Bystanders: Anyone working within 2 metres of an active nail gun must wear eye and hearing protection. Supervisors are responsible for enforcing this. If bystanders will not wear PPE, cease nail gun operations until the area is clear.

5 Maintenance, Clearing Jams, and Emergency Response

Routine maintenance:

Clean the tool regularly — particularly the nose, magazine, and drive blade. Debris causes misfires and jams
Lubricate as per the manufacturer instructions — Paslode tools require specific lubrication intervals
Check the drive blade for wear — a worn drive blade causes bent nails and misfires
Remove the fuel cell before carrying out any maintenance or cleaning
Store the tool with the fuel cell removed when not in use for extended periods
Only authorised personnel should carry out repairs — do not attempt to dismantle the tool beyond routine user maintenance

Clearing a jammed nail — safe procedure:

Point the tool in a safe direction — away from people
Remove the fuel cell
Remove the battery
Wait 30 seconds to allow the combustion chamber to clear of any residual gas
Open the nose/magazine as per the manufacturer instructions to access the jam
Remove the jammed nail carefully — do not use another nail as a lever
Inspect the nose and drive blade before reloading

Never clear a jam with the fuel cell or battery fitted. The tool can fire during the clearing process. Always disconnect power sources first.

If a nail gun injury occurs:

Call 999 immediately — nail gun injuries always require hospital treatment
Do not attempt to remove the nail — this can cause further damage and increased bleeding
Apply pressure around (not on) the nail to control bleeding
Keep the casualty still and calm until the ambulance arrives
Report the incident to your supervisor and record it in the accident book
Preserve the scene — the tool should not be used again until investigated

6 Key Summary

DO

Carry out pre-use checks before every use
Wear safety glasses, hearing protection, and safety boots
Keep bystanders at least 2 metres away
Check what is behind the workpiece before nailing
Use sequential fire mode only
Remove fuel cell and battery before clearing jams
Store fuel cells correctly away from heat and ignition
Use a tool lanyard when working at height

DON'T

Point a nail gun at yourself or others
Bypass or disable any safety mechanism
Use contact/bump fire mode without authorisation
Clear a jam with the fuel cell or battery fitted
Use the wrong fuel cell or nails for the tool
Store fuel cells in hot vehicles or near ignition sources
Carry the tool with your finger on the trigger
Attempt to remove a nail from an injury site

Remember: A nail gun injury can happen in a fraction of a second. The tip safety and trigger safety exist for a reason — never override them. Treat a nail gun with the same respect you would give a firearm.

Certificate Validity: This Nail Gun Safety certificate is valid for 12 months from the date of issue.

? Knowledge Assessment

Answer all 10 questions. You must score 75% or above (8/10) to pass and receive your certificate.

Question 1 of 10

Most nail guns require two actions to fire. What are they?

The trigger and the safety switch on the side The trigger and the nose contact (tip safety) must both be depressed simultaneously The trigger only — the tip safety is optional The trigger and a separate key switch

Question 2 of 10

Before clearing a jammed nail from a gas-powered nailer, what must you do first?

Point the tool downward and pull the trigger to clear the jam Remove the fuel cell and battery, then wait 30 seconds before opening the nose Ask a colleague to hold the tool while you clear the jam Use a screwdriver to push the nail through

Question 3 of 10

Which fire mode must OBR operatives use unless specifically authorised otherwise?

Contact (bump) fire mode for speed Either mode — the choice is personal preference Sequential fire mode only Auto fire mode

Question 4 of 10

What is the minimum safe distance that bystanders must maintain from an active nail gun?

0.5 metres 1 metre 2 metres 5 metres

Question 5 of 10

Which PPE is mandatory when using or working near a nail gun?

Hard hat only Safety glasses and gloves only Safety glasses or goggles, hearing protection, and safety boots as a minimum No PPE is required for nail guns as they are considered low risk

Question 6 of 10

Where must fuel cells for gas-powered nail guns be stored on site?

In the site cabin for easy access In a cool, dry designated flammable materials storage area away from ignition sources In the tool box next to the nail gun In a vehicle for convenience

Question 7 of 10

A nail gun injury occurs on site — a nail has entered a colleague's hand. What is the correct immediate action?

Pull the nail out carefully and apply a plaster Call 999 immediately, do not remove the nail, apply pressure around the wound, and keep the casualty still Drive the casualty to hospital yourself to save time Apply a tourniquet above the wrist and remove the nail

Question 8 of 10

Why must you check what is behind a workpiece before nailing?

To ensure the nail will hold correctly Nails can pass completely through the workpiece and injure someone on the other side To check for hidden cables only To avoid damaging the workpiece surface

Question 9 of 10

When working with a nail gun at height on scaffolding, what additional safety measure is required?

No additional measures are required The tool must be secured with a tool lanyard to prevent it falling The fuel cell must be removed when working above 2 metres A second person must hold the tool at all times

Question 10 of 10

What should you do if a fuel cell is leaking?

Continue using it until it is empty Seal the leak with tape and continue working Remove it immediately in a ventilated area, keep away from all ignition sources, and report it Place it in a bucket of water to neutralise the gas

Certificate of Completion

Nail Gun Safety

This is to certify that

Nail Gun Safety Training

Has successfully completed the OBR Construction Nail Gun Safety online training module in accordance with the Provision and Use of Work Equipment Regulations 1998 (PUWER) and HSE guidance on the safe use of nail guns and cartridge-operated tools in construction.

Score Achieved

Date of Issue

Valid Until

Trainer

Martin Jones

Reference

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