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Ezi-Flo Rainwater Systems

Ezi-Flo from Roofing Industries offers a comprehensive selection of spouting systems, and gutters which are functional, as well as aesthetically pleasing, and are suited to most residential and some commercial applications, irrespective of roofing style and materials used.  Purpose made gutters can also be manufactured to meet specific project requirements with appropriate external or internal brackets supplied to suit.  

Available as zincalume, galvanised, aluminium, stainless steel, copper, zinc, zinc magnesium alloy, Colorcote and Colorsteel pre-painted modern colour surface finishes. 

Ezi-Flo downpipes, in square or round profiles, feature proprietary bends and joiners for improved water flow.  Rainwater heads are available to ensure smooth flow particularly during periods of heavy rainfall. Ezi-Flo Rainwater heads are normally custom manufactured in range of materials and finishes.

  • Traditional Spouting: Quarter Round, Old Gothic, J Line, ½ Round 168mm, ½ Round Swaged, ½ Round Flat Back, ½ Round Flat Back SwagedGutter Systems: 125mm Box Gutter, 175mm Box Gutter, 300mm Box Gutter
  • Custom Design Gutters
  • Rainwater Heads — zinc, galvanised, stainless steel, copper, aluminium, and Colorcote and Colorsteel surface finishes
  • Downpipe Systems: rectangular, round
Key Features
  • Custom design guttering can be manufactured it suit individual projects
  • Colour-matched brackets
  • Downpipe systems in rectangular or round
  • Rainwater heads can be custom made to meet design and capability
NZ Made
NZ Made
Scope of Use
  • Suitable for most residential applications
  • For low pitched roofs the J Line gutter is ideal as it features an extended sloping face to hide the end of the roofing
  • Suitable for some commercial applications — larger gutters such as the 300mm Box Gutter combined with Rainwater Heads can provide solutions
  • All Roofing Industries Rainwater products are compatible for the collection of drinking water
Limitations on Use

It is imperative that the appropriate rainwater system, comprising, gutters, spouting, fascia, brackets and downpipes are correctly specified and then installed accordingly to ensure rapid shedding of water from the roof via downpipes to the groundwater system. Failure to implement an efficient rainwater system can result in water ingress and significant water damage to property. Roof drainage performance design must take the following factors into account:

  • Roof pitch
  • Rainfall intensity
  • Catchment area
  • Cross sectional area of the rainwater carrying system including downpipes
  • Rainhead design
  • Efficiency of flow rate and water discharge via the Downpipe(s)
  • Overflows
  • Roofing profile capacity
  • Roof penetrations which may obstruct water flow

For further information in relation to all roof drainage charts and calculations refer to Roofing Industries.

Where snow may collect on the roof and the rainwater system, it is recommended Roofing Industries staff are consulted for design and appropriate installation instructions including the possibility of using snow straps.

Other Performance Attributes

Regular maintenance will extend the life of rainwater systems, and it is especially important to keep all surfaces free from dirt, leaves and debris accumulation, paying particular attention to the requirement of frequent freshwater washing of the undersides of gutters and spouting which may not receive regular rain washing or alternatively are installed in a corrosive environment. 

Brochure: Ezi-Flo Rainwater Solutions


Brochure: Roofing with Style


Installation Guide: Metal Longrun Roofing & Cladding


Installation: MRM Code of Practice
RANZ Roofing Guide
CAD/PDF Details
Commercial or Residential
Roofing Details
Roofing Industries Gutter Profiles



Roofing Industries Fascia Profiles



RVT Version
Commercial or Residential
Fascia and Gutter Profiles

RI-AF01 2016

Revit 2016

Roofing Industries is a 100% New Zealand owned and operated metal roof and cladding manufacturing business.

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