Harmer Roof Aluminium Outlets

Harmer Aluminium Roof Outlets are hydraulically engineered to ensure trouble-free performance, whilst offering versatility and choice for both architects and specifers.
  • Provide flat roof drainage for warm, cold and inverted roofs
  • For flat roof structures with insitu cast concrete, timber or lightweight metal deck construction
  • Ideal for connection to continuous waterproofing systems (single layer, built up felt, mastic asphalt or single ply)
  • Designed to connect to individual downpipes
  • Not be used in managed rainwater systems
  • Screw outlets recommended where connection to outlet occurs within thickness of concrete slab, where a completely gas-tight seal is required
  • AV® Retro-Gulley outlets available for flat roof refurbishment (removal of old rainwater outlet not necessary)
  • AV® Multi-Gulley outlets available for variable angle discharge Installation & Fixing

Installation & Fixing

  • Easy to handle and fix
  • Minimal maintenance requirements
  • Lightweight, durable and non-corrodible
  • AV® outlets drain up to 40% more roof area than conventional gravity outlets
  • High flow performance with increasing head of water at the outlet
  • Life expectancy of aluminium: 40 years (rural/suburban areas); up to 25 years (industrial/marine areas)
  • Aluminium is 100% recyclable
Materials & Finishes
  • Precision cast in aluminium silicon alloy LM6 to BS EN 1559:1997
  • Outlet body (fully concealed after installation) is in mill finish aluminium
  • Gunmetal specification available for connection to copper pipework and for installation in copper or lead-clad roofs
  • Grate is polyester powder coated in blue; clamping collar is coated in yellow
  • Domical grates supplied as standard; flat grates are also available  

If you have ANY questions about our products, or want to give us some feedback about your shopping experience with us, please feel free to contact us on 0330  2231731 or email:

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