Warning Signs

Construction Warning Signs alert workers, contractors, visitors and members of the public to potential hazards commonly found on building sites and temporary work areas. Also known as site warning signs, hazard warning signs or construction hazard signs, they play a vital role in reducing risk and improving site safety.

Widely used by contractors, developers, principal contractors, local authorities and facilities managers, these signs help identify dangers such as moving vehicles, excavations, overhead work, hazardous substances and restricted access areas.

Typical installation locations include site entrances, perimeter fencing, hoardings, access routes, excavation zones, loading areas, scaffolding locations and high-risk work areas.

Manufactured in the UK and available in durable materials suitable for indoor and outdoor use, construction warning signs provide clear visual communication to help maintain safe and compliant construction environments.

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Pack of 6 Warning Deep Excavations safety signs with yellow warning symbol

Pack of 6 Warning Deep Excavations Signs

Warn workers and visitors of hazardous excavation areas with this Pack of 6 Warning Deep Excavations Signs designed to improve site safety and hazard awareness.
• Warns of deep excavation hazards
• Ideal for construction sites, roadworks, utility projects and excavation areas
• High-visibility yellow and black warning design for maximum recognition
• Available in Rigid Plastic (1mm)
• Supplied as a pack of 6 for consistent safety signage across site
£53.09
Warning Men At Work safety sign with warning hazard symbol

Warning Men At Work Sign

Warn staff, visitors and the public of active work areas with this highly visible warning safety sign.
• Indicates active work zones to improve safety awareness
• Ideal for construction sites, industrial areas and maintenance zones
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce accidents by warning people of ongoing work activities
£8.10
Danger Buried Cables Electrical warning safety sign with electrical hazard symbol

Danger Buried Cables Electrical Sign

Warn workers of buried electrical cable hazards with this Danger Buried Cables Electrical Sign.
• Alerts workers to the presence of underground electrical cables
• Ideal for construction sites, excavation zones and utility areas
• High-contrast yellow and black design ensures clear visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), and Self Adhesive Vinyl
• Helps reduce the risk of cable strikes, electrical accidents and excavation damage
£2.71
Danger Asbestos Being Removed No Unauthorised Persons Beyond This Point safety sign with warning and prohibition symbols

Danger Asbestos Being Removed No Persons Sign

Warn staff, contractors and visitors that asbestos removal is in progress and prohibit unauthorised access with this highly visible safety sign.
• Prevents entry into hazardous asbestos removal zones
• Ideal for construction sites, demolition areas and restricted workspaces
• High-visibility yellow, black and red design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps reduce exposure risks and maintain site safety compliance
£6.86
Danger Asbestos No Admittance Protective Clothing safety sign with warning, prohibition and mandatory symbols

Danger Asbestos No Admittance Protective Clothing Sign

Warn personnel of asbestos hazards and enforce controlled access with this Danger Asbestos No Admittance Protective Clothing Sign.
• Warns of asbestos hazards, restricts access to authorised personnel and requires protective clothing before entry
• Ideal for asbestos-contaminated areas, construction sites and plant rooms
• Bold colours and recognised safety symbols provide excellent visibility and quick understanding
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back), and Self Adhesive Vinyl
• Helps enforce site safety procedures and reduce the risk of exposure to hazardous asbestos materials
£6.86
Danger Keep Out safety sign with warning and mandatory symbols

Danger Keep Out Sign

Warn individuals to stay out of hazardous or restricted areas with this Danger Keep Out Sign.
• Clearly communicates danger and restricted access requirements
• Ideal for construction sites, industrial areas and restricted zones
• Bold colours and recognised safety symbols provide excellent visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps maintain workplace safety, security and prevent unauthorised access
£7.14
Caution wet paint safety sign with paintbrush symbol

Caution Wet Paint Sign

Warns individuals of freshly painted surfaces to prevent contact and potential damage
• Alerts people to avoid contact with wet paint surfaces
• Ideal for maintenance areas, public spaces, and construction sites
• Bright yellow background with clear text ensures high visibility
• Available in Rigid Plastic (1mm) and Self Adhesive Vinyl
• Helps prevent smudging, damage, and accidental contact
£2.71
Danger Scaffolding Incomplete warning safety sign with scaffolding hazard symbol

Danger Scaffolding Incomplete Sign

Warn people of incomplete scaffolding and potential fall hazards with this Danger Scaffolding Incomplete Sign.
• Clearly alerts workers and visitors to unsafe incomplete scaffolding
• Suitable for construction sites, maintenance areas and building works
• High-visibility yellow and black design ensures instant recognition and readability
• Available in Rigid Plastic (1mm) and Rigid Plastic (2mm)
• Helps prevent accidents by restricting access to unsafe scaffolding structures
£9.83
Danger High Voltage Cables Underground warning safety sign with electrical hazard symbol

Danger High Voltage Cables Underground Sign

Warn workers and the public of buried high voltage electrical cables with this Danger High Voltage Cables Underground Sign.
• Clearly warns of underground high voltage cable hazards to help prevent accidental contact
• Ideal for construction sites, excavation areas and industrial zones
• High-contrast yellow and black design ensures maximum visibility and instant recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce the risk of electrical accidents and supports safer excavation practices
£7.14
Warning Men Working Below Sign with yellow hazard symbol

Warning Men Working Below Sign


Alerts workers and visitors to personnel working below ground level or in excavated areas.
• Warns of people working below to help prevent accidents
• Suitable for excavations, basements, construction sites, access routes and work zones
• Bold yellow warning design with clear black text and hazard symbol
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps improve awareness around below-ground work areas
£10.81
Warning Mud On Road Sign

Warning Mud On Road Sign

Warning Mud On Road Sign helps alert drivers, workers and visitors to mud hazards on road surfaces.
• Warns of mud on the road to reduce accident risk
• Used on construction sites, farm entrances and site access roads
• Clear yellow warning design with bold black text and symbol
• Available in Rigid Plastic (1mm) and Self Adhesive Vinyl
• Helps maintain safer vehicle movement around muddy areas
£14.77
Danger Asbestos Permit To Work Must Be Obtained safety sign with warning and mandatory symbols

Danger Asbestos Permit To Work Must Be Obtained Sign

Ensure permit to work procedures are followed in asbestos hazard areas with this highly visible danger and mandatory safety sign.
• Warns individuals of asbestos hazards and requires a permit to work before access
• Suitable for construction sites, refurbishment areas, restricted zones and hazardous work environments
• High-visibility yellow, black and blue design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic 1mm (Self Adhesive Back), Rigid Plastic (2mm), Rigid Plastic 2mm (Self Adhesive Back) and Self Adhesive Vinyl
• Helps control access to asbestos hazard areas and supports safe working procedures
£6.86