What are Rainheads and Sumps? Exploring Their Value and Importance

When people think about roofing and stormwater systems, gutters and downpipes usually get all the attention. Rainheads and sumps, on the other hand, are often overlooked. This is despite them actually playing a major role in managing heavy rainfall and protecting a property from water overflow.

You’ll see them on everything from modern architectural homes through to commercial buildings and industrial projects across Melbourne. In addition to their value in a practical sense, they’ve also become a popular design feature, particularly when paired with contemporary roofing materials like COLORBOND® steel.

Keep reading for everything you need to know!

What Is a Rainhead?

A rainhead, which might also be called rainwater heads, rainwater diverters, collectors’ heads, and even leaf eaters, are essentially the first-stage of filtration devices for the downpipes outside your property.

In terms of design, they’re typically available as:

Long tapered
Rectangle
Rectangle/collared
Rectangle/tapered
Square
Standard tapered
Conical
Ned Kelley
Rectangle collared/tapered

Essentially, the main function of a rainhead is to collect rainwater from the roof and direct it into a downpipe or gutter system. This process helps to stop any debris, leaves, and branches from clogging the drainage system and reduces water flow velocity, splashing, and noise.

Need quality roofing supplies in Coburg, Dandenong or Reservoir? From rainheads to skylights and custom-made flashings, you’ll find it all at your nearest Roofing Options Centre store.

What Is a Sump?

A sump performs a similar function, but is generally installed in box gutters. It acts as a collection point where water gathers before entering the downpipe system.

Box gutters are commonly used on commercial buildings and modern residential designs, but they can hold significant amounts of water during heavy rainfall. Without an effective drainage point, water can pool and create unnecessary stress on the roofing structure.

Sumps help move water away efficiently while also supporting overflow management. In many projects, they’re custom-fabricated to suit the exact dimensions and drainage requirements of the roof design.

The Value of Rainheads and Sumps

Rainheads and sumps are not simply decorative additions. They form an important part of a properly functioning roof drainage system.

Better Stormwater Management

One of their biggest advantages is improved control over stormwater flow. By slowing and directing water more effectively, they help reduce surging through downpipes during intense rainfall.

This becomes particularly important in Melbourne and other parts of Australia where weather conditions can change quickly and heavy rain events are common.

Overflow Protection

If a downpipe becomes blocked by leaves, debris or other obstructions, rainheads can provide a visible overflow point. Rather than allowing water to back up into the roof cavity, excess water spills externally where the issue can be noticed sooner.

That extra layer of protection can help minimise costly water damage.

Support for Larger Roof Designs

A lot of newer homes and commercial buildings you come across in Melbourne tend to feature expansive rooflines and box gutter systems. However, some of these designs can actually collect enormous amounts of water across relatively short periods of time.

Rainheads and sumps help those systems cope with higher water volumes more effectively, particularly during storms.

Architectural Appeal

Rainheads have also become a strong visual feature in modern building design. Square, round, half-round and V-shaped profiles can complement both traditional and contemporary exteriors.

With custom fabrication available, they can be tailored to suit the proportions and style of the project rather than appearing as an afterthought.

The Benefits of COLORBOND® Steel Rainheads and Sumps

Material choice matters just as much as design. That’s why many builders, roof plumbers and homeowners choose COLORBOND® steel for rainheads and sumps.

Built for Australian Conditions

Australian weather can be harsh on external building materials,

Intense UV exposure, coastal conditions, heavy rainfall and fluctuating temperatures all take their toll over time.

COLORBOND® steel is manufactured and tested specifically for Australian conditions, making it a reliable option for long-term performance.

Strong and Durable

Rainheads and sumps deal with constant water exposure, so durability is critical. COLORBOND® steel offers excellent strength while resisting corrosion, peeling, cracking and chipping when properly installed and maintained.

That durability makes it well suited to both residential and commercial roofing applications.

Consistent Design Finish

One of the major advantages of COLORBOND® products is the wide range of colours available, with options to suit basically any stylistic preference. The other benefit here is that rainheads and sumps can be matched to roofing, gutters, fascia and other external elements for a more cohesive finish across the property.

Rather than standing out awkwardly, they become part of the overall architectural design.

COLORBOND® & ZINCALUME® Rainheads

All of our Rainheads and Sumps are manufactured using Bluescope COLORBOND® or ZINCALUME® Steel. We only use one of Australia’s most trusted products because it is made to last, tested in the harshest conditions and made right here in Australia.

COLORBOND® Rainheads and other COLORBOND® products look great on your project! That’s why Roofing Options Centre is Melbourne’s favourite COLORBOND® Rainhead and Sump manufacturer & supplier.

Custom-Made Colorbond Rainheads

Rainheads act like large overflow containers to assist downpipe water flow and reduce water surges into the stormwater system. We manufacture Custom-Made Rainheads, each handmade to suit the unique needs of your individual project. Standard designs are available as well as a small range of Stocked-Sizes on the shelf, all of which are available in the entire COLORBOND® colour range.

Custom-Made to your requirements
Bead or No Bead, the choice is yours
Various designs such as Square, Round, Half Round & V Shape
Available in the entire COLORBOND® colour range & ZINCALUME® steel

Stay Protected with COLORBOND® Rainheads and Stumps

Ready to get your hands on COLORBOND® rainheads and stumps in Melbourne? Roofing Options Centre is the place to be. Simply use our order forms to make an order, or pop by one of our stores to view it all up close and chat with an expert!

Our team knows roofing supplies like the back of their hand, and will happily work with you to find an option that best suits your needs. In addition to steel roofing supplies, we also stock a great selection of: