Construction Signs

FAQs

• Where to buy construction safety signs?

  SMI makes it easy to stay compliant with site signage. 

  We stock:

  • Durable signs for indoor and outdoor use
  • Clear messages that meet UK safety standards
  • Multiple styles for hazard, warning, and general information signs

  Explore our construction signs range for quick ordering and delivery.

• What colour are construction zone signs?

  Each sign colour has a specific safety meaning. 

  Common types include:

  • Red for prohibition messages (e.g., "No Entry")
  • Green for safety and exit routes (e.g., "Fire Exit")
  • Blue for mandatory actions (e.g., "Wear Helmet")
  • Yellow for warnings (e.g., "Caution: Deep Excavation")

  These colours follow standard UK safety guidelines for fast visual recognition.

• What are the mandatory signs on building sites?

  Site managers are required to display signs that communicate essential safety rules.

  These often include:

  • Entry restrictions for visitors or staff
  • Emergency exit and first aid locations
  • Fire safety signage, including extinguisher points
  • PPE notices for hard hats, hi-vis and safety boots

  Visit our PPE section and signage category to make sure your site is fully covered.

• What are the 5 types of safety signs in construction?

  UK regulations define the five main types of safety signs used in construction. 

  These are:

  • Warning signs - yellow triangles with black icons
  • Prohibition signs - red circles with a diagonal line
  • Mandatory signs - blue circles with white symbols
  • Safe condition signs - green rectangles for emergency info
  • Fire safety signs - red rectangles showing equipment locations

  To find the right signage for your site, browse our full signs and labels.