Harmer Aluminium Roof Detail Rainwater Outlets are designed for use with flat roof structures, using either insitu cast concrete, timber or lightweight metal deck construction. Harmer Roof Outlets are ideal for connection to continuous waterproofing systems using single ply membranes, mastic asphalt, high performance built-up felt and liquid applied systems.

Product Images
Key Points


  • Two-way outlets are for connection to pipework through a parapet
  • Balcony outlets are supplied with a flat grate and are for use in areas of pedestrian access.
  • Gulley outlets are for narrow gutter and gulley drainage
  • Car Park outlets are for designed to meet drainage requirements in multi-level car park and utility areas
  • Horizontal and 45 degree discharge outlets are available for flat roof applications
  • Lightweight, durable and non-corrodible
  • 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)
  • Connection to all standard sizes of pipework
  • BBA approved powder coating on grate and clamping collar
  • Aluminium is 100% recyclable
  • Precision cast in aluminium silicon alloy LM6 to BSEN 1559:1997
  • Outlet body (fully concealed after installation) is in mill finish aluminium
  • Minimal maintenance requirements
  • Grate is polyester powder coated in blue; clamping collar is coated in yellow
Installation & Fixing
  • Easy to handle and fix
  • Minimal maintenance requirements