Construction site signage checklist (CDM 2015)

CDM 2015: who is responsible?

CDM 2015 (the Construction (Design and Management) Regulations 2015) is the primary UK regulation for construction safety. It places duties on:

• The client — making suitable arrangements for managing the project, including ensuring the principal contractor and principal designer are appointed and resourced
• The principal designer — coordinating health and safety in the pre-construction phase, including identifying signage needs at the design stage
• The principal contractor — coordinating health and safety in the construction phase, which is where most signage decisions actually happen
• Designers — eliminating or reducing risks through their designs
• Contractors — implementing the principal contractor's plan and managing their own work safely

For signage specifically, the principal contractor is the practical decision-maker on most projects. They specify what signs go where, manage supplier procurement, and update signage as the site progresses through phases.

The seven categories of construction site signage

1. Site identification and contact

Required by planning conditions and CDM 2015. Includes the project board (project name, principal contractor name, principal designer name, site manager contact, completion date), hoarding graphics, and any branded site identification.

2. Perimeter access control

"Authorised personnel only" prohibition signs at all gates and access points. "No public access" supplementary signage on hoarding. "No unauthorised entry" warnings on perimeter. The principal contractor has a duty under CDM to control site access.

3. Mandatory PPE

Blue circle mandatory signs at all entry points showing required PPE — typically hard hat, hi-vis, safety footwear at minimum. Activity-specific PPE (eye protection, ear protection, respiratory) signed at the boundary of zones where required. See our PPE signage range.

4. Hazard warnings

Yellow triangle warning signs for site-specific hazards. Vehicle movement warnings (forklift, dumper, crane), deep excavation warnings, overhead work warnings, hot work warnings, slippery surface warnings during wet conditions. Updated as the site evolves through phases.

5. Prohibition

Red circle prohibition signs. "No smoking" (statutory under Health Act 2006 for any enclosed welfare facility). "No entry" to specific high-risk zones (e.g. exclusion zones around lifting operations). "No mobile phones" in fuel storage areas.

6. Site rules / induction

Induction signage at the welfare facility or main site office. Site rules board summarising the safety expectations. Visitor management signage. Speed limit signage for site vehicles. Lone worker policies if applicable.

7. Emergency information

Assembly point identification at the designated muster location. First aid signage at the first aid post. Fire equipment identification at extinguishers and call points. Emergency contact information board. Post-incident protocol signage.

Multi-message site safety boards

Most UK construction sites combine multiple required signs into one or two large multi-message boards mounted at the main entry points. This reduces visual clutter while ensuring all required messages are visible at a glance. Direct Signs manufactures bespoke multi-message boards in any combination — typical sizes are 1200×900mm or 1500×1000mm in aluminium composite.

Materials and lifespan

Construction signage is exposed to wind, weather, vehicle strikes, and contractor handling. Standard recommendation: aluminium composite (Dibond) for 12-18 month project durability. For longer projects (multi-year megaprojects, infrastructure builds), upgrade to pressed aluminium. Avoid vinyl-only signs for external construction signage — they degrade in 6 months under typical site exposure.

Browse construction signage

• Quarry and construction signage hub
• Mandatory PPE signs
• Hazard and warning signs
• Prohibition signs
• Bespoke multi-message boards (custom quote)