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Harmer Cast Aluminium Roof Outlets

Harmer Cast Aluminium Roof Outlets


Harmer aluminium roof outlets are designed to be compatible with various roof constructions and waterproofing membranes. These outlets ensure a secure and watertight connection between the drainage system and the roof, providing effective and efficient water displacement.

These outlets are lightweight yet durable for ease of installation. Their high flow performance ensures that rainwater is efficiently directed away from the roof, preventing potential water damage.

Harmer offers a wide range of roof drainage products designed to work seamlessly with the waterproofing membrane. This critical connection ensures the long-term effectiveness of the roof drainage system and minimizes the risk of leaks and damage.

Overall, Harmer Roof AV Vertical outlets can be supplied with a dome or flat grate to provide reliable and efficient drainage for flat roof structures, using either in-situ cast concrete, timber or lightweight metal deck construction.

An aluminium roof outlet connects to continuous waterproofing systems, including single-ply membranes, mastic asphalt, and high-performance built-up felt.

Aluminium roof outlets provide a drainage solution for excess rainwater and prevent pooling or flooding on the roof surface.

Gutters Online offers competitive prices and a wide range of high-performance aluminium roof outlets from Harmer to meet the demands of various flat roofing applications.


Aluminium roof outlet range

Our range of roof outlets includes retro-gulley outlets designed for flat roof refurbishment without removing the old rainwater outlet. Roof outlets are available with a vertical spigot or threaded connection, making them suitable for various applications.

Aluminium roof outlets offer efficient flat roof drainage solutions for various types of roofs - warm, cold, and inverted. These outlets are designed to connect to individual downpipes and are ideal for flat roof structures made of in-situ cast concrete, timber, or lightweight metal deck construction.


Harmer roof drainage

Standing water can add unnecessary weight to a roof, potentially causing it to sag or collapse. Efficient rainwater systems divert rainwater away from the roof and foundation, prolonging the lifespan of the roofing materials and preventing costly repairs. A well-maintained drainage system is a vital component in maintaining any roofing structure's overall functionality and longevity.


Roof drainage applications


Low-pitched and flat roof applications

The Harmer Roof range is designed for flat and low-pitch roofs. With Harmer's AV aluminium range, you can experience exceptional flow performance, reducing multiple outlet requirements.

The anti-vortex effect becomes more robust as the water depth or rainfall intensity increases, ensuring efficient water disposal even in harsh weather conditions.

High flow performance roof outlets include a deep integral sump for controlled water flow into the pipe. Dome grates for Harmer AV outlets incorporate a patented baffle to prevent water swirl and air entrapment, giving you a high capacity aluminium flat roof outlet. The AV system provides complete reassurance, critical to building drainage design.


Roof outlets for car parks and industrial buildings

We offer load-bearing outlets designed for applications where roof outlets are exposed to vehicular traffic. These outlets are specifically suited for car parks, factories, and workshops. Harmer Car Park outlets are designed to meet drainage requirements in multi-level car parks and utility areas.


Outlets for balconies

The Harmer aluminium shallow sump balcony outlet offers a discreet design solution for new and refurbishment projects. With a wide range of grate options, it not only enhances the functionality but also improves the overall appearance of the drain. Harmer roof outlets can seamlessly integrate with aluminium rainwater systems, allowing endless design possibilities.

The Harmer Balcony range ensures practicality and style using paving supports, sand or cement bedding, or epoxy resin coverings.


Outlets for roof terraces

Harmer's Modulock system is designed for efficient raised deck drainage on green roofs, terraces, walkways, and ballasted flat roof construction.


Why use aluminium outlets?

Aluminium is strong, durable, and sustainable. It is also weatherproof and unaffected by UV light, ensuring long-lasting performance. The Harmer aluminium outlet range is known for its exceptional quality and is made from marine-grade aluminium alloy, which offers excellent corrosion resistance.


Life expectancy of aluminium

Aluminium outlets have a functional life expectancy of 40 years (up to 25 years in industrial/marine environments) and can be fully recycled.


Technical information

  • 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 the grate and clamping collar
  • Easy-to-follow installation guide

Order securely online or contact our friendly customer service team on 0330 912 2288.

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