FLAT ROOF

Flat roofs are common in modern architecture and commercial buildings. While they appear level, they always have a slight pitch (at least 1:40) to ensure water drains properly.

Pros and Cons

  • Cost-effective: Uses fewer materials than pitched roofs.
  • Extra Space: Perfect for roof gardens, terraces, or HVAC units.
  • Accessibility: Easier and safer to inspect or install solar panels.

Cons: 

  • Drainage: Water can pool if the design or maintenance is poor.
  • Maintenance: Requires more frequent checks than sloped roofs.
  • Lifespan: Generally shorter (15–30 years) compared to tiles or slate.
Common Materials
  • EPDM (Rubber): Durable, lightweight, and very resistant to weathering.
  • TPO / PVC: White reflective membranes that help reduce cooling costs.
  • Built-Up Roof (BUR): Traditional layers of gravel and hot tar.
  • Modified Bitumen: Asphalt layers reinforced with fabric or fiberglass.
  • GRP (Fiberglass): A seamless, liquid-applied glass-reinforced plastic.