Warning Signs

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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Danger Explosive Atmosphere EX ATEX Category 2 safety sign with recognised EX hazard symbol

Danger Explosive Atmosphere Sign - EX Atex Category 2

Warn staff and visitors of explosive atmosphere hazards in ATEX Category 2 areas with this highly visible danger safety sign.
• Clearly identifies areas where explosive atmospheres may occur
• Suitable for industrial sites, factories and hazardous zones
• High-visibility yellow and black 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 maintain ATEX compliance and improve workplace safety awareness
£2.26
Danger Scaffolding Incomplete warning sign with yellow and black triangular scaffolding hazard symbol

Danger Scaffolding Incomplete Sign

Warn workers and visitors of incomplete scaffolding and potential fall hazards with this Danger Scaffolding Incomplete Sign.
• Clearly warns of unsafe, incomplete scaffolding structures
• Ideal for construction sites, maintenance areas and building works
• High-visibility yellow and black design for clear hazard identification
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps reduce accidents by alerting people to scaffolding hazards
£5.72
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
£5.72
Warning Site Traffic safety sign with warning hazard symbol

Warning Site Traffic Sign

Warn staff, visitors and drivers of moving site traffic with this highly visible warning safety sign.
• Alerts people to the presence of moving site traffic
• Suitable for construction sites, industrial yards and loading areas
• High-visibility yellow and black design for clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps reduce accidents by increasing awareness of vehicle movement
£8.50
Danger Overhead Live Wires electrical warning sign with electrical hazard symbol

Danger Overhead Live Wires Electrical Sign

Warn staff, contractors and visitors of hazardous overhead live electrical wires with this highly visible danger safety sign.
• Alerts people to the presence of overhead live electrical hazards
• Suitable for construction sites, industrial areas and outdoor work zones
• High-visibility yellow and black 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 reduce the risk of accidental contact with live electrical wires
£5.72
Danger Asbestos Keep Out Sign

Danger Asbestos Keep Out Sign - Landscape

Danger Asbestos Keep Out Landscape Sign clearly warns workers, contractors and visitors of asbestos hazards and instructs unauthorised individuals to stay out of restricted areas.
• Warns of asbestos hazards and reinforces keep out instructions to help prevent accidental exposure.
• Ideal for construction sites, demolition projects, refurbishment areas, industrial premises and restricted asbestos work zones.
• High-contrast yellow warning and blue instruction panels with bold lettering provide clear visibility and quick recognition.
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm) and Self Adhesive Vinyl.
• Landscape format helps communicate asbestos danger and access restrictions clearly at entrances, barriers and hazardous work areas.
£2.01
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
£6.75
Construction Site Keep Out No Trespassing Sign

Danger Construction Site Keep Out / No Trespassing Sign

Danger Construction Site Keep Out / No Trespassing Sign clearly warns workers, visitors and members of the public of construction hazards and prohibits unauthorised entry.
• Combines a construction site danger warning with a clear no trespassing instruction to discourage unauthorised access.
• Ideal for building sites, development projects, perimeter fencing, restricted work zones and industrial premises.
• High-contrast yellow warning and red prohibition panels with bold lettering provide clear visibility and recognition.
• Available in Aluminium Composite (3mm), Rigid Plastic (1mm), Rigid Plastic (2mm) and Recyclable Correx ® (4mm).
• Helps reinforce construction site security, access restrictions and awareness of potentially hazardous work areas.
£10.76
Warning Pedestrians Crossing safety sign with pedestrian symbol on yellow warning background

Warning Pedestrians Crossing Sign


Clearly warns drivers and personnel of pedestrian crossing activity to improve safety in shared areas.
• Warns of pedestrian crossing hazards and moving foot traffic
• Ideal for construction sites, warehouses, car parks, and roadways
• High-visibility yellow and black design ensures clear recognition
• Available in Rigid Plastic (1mm), Rigid Plastic (2mm), Self Adhesive Vinyl and Recyclable Correx ® (4mm)
• Helps reduce accidents by encouraging awareness around pedestrian routes
£8.50
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
£44.24
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
£8.19
Danger deep excavations safety sign with warning symbol

Danger Deep Excavations Sign

Warns of dangerous deep excavation areas to prevent accidents and ensure site safety
• Alerts workers and visitors to serious deep excavation hazards
• Ideal for construction sites, civil engineering works, and excavation zones
• Bold black text on yellow background ensures maximum visibility
• Available in Rigid Plastic (1mm) and Rigid Plastic (2mm)
• Helps reduce risk of falls and supports safer working conditions
£8.19