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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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
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
Danger Deep Water warning safety sign with deep water hazard symbol

Danger Deep Water Sign

Warn individuals of deep water hazards with this Danger Deep Water Sign.
• Alerts people to the presence of deep water and potential drowning hazards
• Suitable for construction sites, docks, waterways and industrial areas
• High-contrast yellow and black design ensures excellent visibility and quick recognition
• Available in Rigid Plastic (1mm) and Rigid Plastic (2mm)
• Helps reduce the risk of accidents and improve safety awareness around deep water
£9.83
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 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
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
Danger Asbestos Dust warning safety sign with yellow hazard symbol

Danger Asbestos Dust Sign

Warn workers and visitors of hazardous asbestos dust with this Danger Asbestos Dust Sign.
• Clearly communicates the danger of asbestos dust exposure
• Suitable for construction sites, demolition areas and industrial workplaces
• High-contrast yellow and black design ensures maximum 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 respiratory harm by alerting workers and visitors to asbestos dust hazards
£2.71
Danger Asbestos Removal warning safety sign with yellow hazard symbol

Danger Asbestos Removal Sign

Warn workers and visitors of hazardous asbestos removal activities with this Danger Asbestos Removal Sign.
• Clearly communicates the presence of asbestos removal hazards
• Suitable for construction sites, demolition areas and industrial workplaces
• High-contrast yellow and black design ensures excellent visibility and readability
• 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 exposure and improves on-site safety awareness
£2.71
Danger Asbestos Removal landscape safety sign with warning hazard symbol

Danger Asbestos Removal Sign - Landscape

Warn staff, contractors and visitors of hazardous asbestos removal work with this highly visible danger safety sign.
• Clearly alerts people to dangerous asbestos removal activity
• Ideal for construction sites, demolition areas and refurbishment projects
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl
• Helps reduce health risks by improving awareness of asbestos removal operations
£7.36