roofing // flat roofing // waterproofing // drainage // rainwater pipes // soil and waste drainage // flat roof drainage // floor drainage // roof membranes // single ply roofing // built up roofing // thermal insulation // structural metal decking // rooflights // structural waterproofing // green roofs // facade systems // grp // gutters // building envelope // standing seams
Harmer AV is a general range of outlets that uses anti-vortex principles to optimise flow performance when connected to individual downpipes as part of a "one-to-one" flat roof drainage system. The outlet uses a patented baffle within the grating to prevent water swirl and air entrapment, enabling the outlet to drain at 90% of its pipe capacity.
Flat Roof Drainage Product Options:
Harmer Roof AV flat roof drainage units are available as vertical spigot or vertical screw and in gunmetal for copper or lead clad roofs or for connection to copper pipework. Gunmetal outlets are the same design as aluminium outlets, but are cast in 85/5/5/5 leaded gunmetal to BS EN 1982: 1999 - CC491K. Foamed insulation is available as an option for both aluminium and gun metal outlets.
Harmer Roof AV Retro-gulley outlets are designed to fit within the existing outlet and pipework of a roof that is being upgraded. It is a very cost-effective and efficient flat roof drainage solution, since it is not necessary to remove the old rainwater outlet. The tail pipe is cut to the required length, inserted through the existing outlet and sealed to the existing pipework using a special multi-fin pipe seal. The Retro-gulley has been designed in conjunction with the Flat Roofing Contractors Advisory Board.
The Multi-gulley outlets are designed to provide multi-directional flat
roof drainage. Rotated on site, the interchangeable spigot pipe allows for
any angled outflow from vertical to horizontal. This flexibility allows easier
alignment of pipe systems.The Multi-gulley has also been designed in conjunction
with the Flat Roofing Contractors Advisory Board.
Alumasc is a world leader in building and construction products, bringing together the experience and skills of a specialist range of manufacturers' to offer some of the best known and most highly regarded brands on the market. Alumasc's building products, some of which are world leaders in their field, are used throughout the UK and other parts of the world.
Alumasc have a comprehensive portfolio of roofing and waterproofing products. This encompasses the full range of products that are necessary to provide a complete flat roofing system, from high performance roofing membranes to monolithic structural waterproofing and green roofing systems.
roofing // drainage // waterproofing