We are Sydney's Downpipe Roofing Supply Specialist with
the best service, professional advice and product range.


No 1 Roofing and Building Supplies have of a wide range of downpipe supplies that are available in a complete range of gauges, shapes and lengths in both Colorbond and Zincalume.

​We carry all the popular downpipe sizes such as 100 x 50mm, 100 x 75mm, and 90mm round, from all the leading brands in any colour or finish you require.

Downpipe Colours and finishes include all the Colorbond colours, Zincalume, Copper, and Stainless Steel.

We also carry a large range of downpipe accessories, such as brackets, nozzles, joiners, offsets and astragals, and if we don’t have it in store, we can source it for you.

And if we can’t source it, we can make it and provide custom downpipes made to your specifications.

Stratco Contour Downpipe

Stratco Downpipe
ACE Gutters Logo


No1 Roofing and Building supplies is a leading supplier of all ACE downpipe products and are able to supply an extensive range of ACE downpipe rainwater products such as the 100 x 50 MM, 100 x 75 MM, 90 MM Round, and downpipe accessories.

The ACE downpipe products are manufactured in Australia, and are backed by a 20 year warranty, and are available in an extensive range of rainwater products to suit all of your guttering needs.

  • 100 X 50mm, 100 X 75mm, 90mm is available in a DURAKOTE 80% Gloss

Hunter Red, White, Federation Green, Brown, Heritage Red, Smooth Cream, Merino, Jasmin Brown, Slate Grey, Iron Grey.

  • 100 X 50mm, 100 X 75mm, 90mm is available in a DURAKOTE 25% Gloss

Heritage Red, Smooth Cream, Merino, Jasmin Brown, Slate Grey, Iron Grey, Mountain Blue, Rivergum, Tuscan Red, Dusk, Off White, Birch, Gull Grey, Armour Grey, Mist Green, Caulfield Green, Monolith, Ebony, Basal, Territory, Wallaroo, Gulf, Manteal, Coventry.

ACE 100 x 50 MM Downpipe

Ace 100 x 50 MM Downpipe

ACE 90 MM ROUND Downpipe

Ace 90 MM Round Downpipe


100 x 50 MM ROLLFORM

ACE Downpipe 50 x 100 MM

Volume in 1.8m length 9 litres
Flow capacity 3.5 litres per second

100 x 75 MM ROLLFORM

ACE Downpipe 75 x 100 MM

Volume in 1.8m length 13.5 litres

Flow capacity 4.4 litres per second


ACE Downpipe 90 MM

Volume in 1.8m length 11.44 litres
Flow capacity 4.2 litres per second


No1 Roofing and Building supplies is a leading supplier of all ACE downpipe accessories to suit products such as the 100 x 50 MM, 100 x 75 MM, 90 MM Round.

Downpipe accessories

ACE 100 x 50 MM, 100 x 75 MM
Rollform Downpipe

ACE Downpipe Accessoies Rollform Offset


Stramit downpipes and No.1 Roofing and Building Supplies; the perfect partnership for all your residential and commercial downpipes needs.

Since 1989, Stramit has been creating steel cladding products that are trusted by Australians.

Made from Colorbond steel and coated with an incredibly durable Zinc-Aluminium or Zinc-Aluminium-Magnesium alloy, Stramit downpipes are designed to cope with everything the weather can throw at it and yet fit in with any architecturally inspired vision.

Choose from round, rectangular or fluted downpipe profiles in a range of sizes. Superior crush-folded seams are a feature of all Stramit downpipes.


  • Round - 90mm, 100mm, 125mm, 150mm, 225mm, 250mm and 300mm.
  • Rectangular - 100 x 50mm, 100 x 75mm, 100 x 100mm, 100 x 150mm, 150 x 150mm.
  • Standard Lengths - 1.8m and 2.4m but custom made up to 4m long is available in most sizes.


Stramit and No.1 downpipes come in a wide range of more than 30 Colorbond colours and finishes including the:

  • Standard steel range
  • Ultra steel range
  • Matt steel range
  • Copper
  • Stainless steel


Brackets, astragals, shoes, pops, drops and other stormwater connectors are available to order.

We can also supply custom length downpipes. Remember when designing your roof drainage system you’ll need to consider the following:

  • Local rainfall intensity
  • Area of roof catchment
  • gutter & downpipe capacity
  • Potential overflow issues

No 1. Roofing and Building Supplies; we have the products and the expertise to help you sort all your roof drainage issues.

STRAMIT Round Downpipe

Stramit Downpipes


No1 Roofing and Building Supplies and Lysaght downpipes offer the easy way to deal with your roof drainage challenges effectively and elegantly.

Lysaght downpipes offer a range of material and colour options to choose from including Colorbond and unpainted galvanised Zincalume steel.

Lysaght downpipes are suitable for use with all metal and tile roofing materials. Profile options include round, rectangular or square.

Lysaght roofing and cladding products have been an iconic feature of Australia since 1857. Lysaght downpipes are made from 100% Australian steel and they’re still as distinctive as ever.

When you’re looking for products that will last the distance you can’t go wrong with Lysaght.


Lysaght downpipes come in a range of dimensions and shapes to match or contrast with your roof cladding choices including:

  • Rectangular—100x50mm, 100x75mm, 100 x 100mm
  • Square—100x50mm, 100x75mm, 100 x 100mm
  • Round—90mm, 100mm

Lysaght downpipes are fully compatible with the Novaline fascia system but will also complement most standard guttering and fascia systems.


Lysaght downpipes are available in all the Colorbond standard range of colours including:

Basalt®, Classic Cream™, Cottage Green®, Cove®, Deep Ocean®, Dune®, Evening Haze®, Gully®, Ironstone®, Jasper®, Mangrove®, Manor Red®, Monument®, Night Sky®, Pale Eucalypt®, Paperbark®, Shale Grey™, Surfmist®, Terrain®, Wallaby®, Windspray®, Woodland Grey®

The Colorbond Matt range is also available to choose from including:

Basalt®, Dune®, Monument®, Shale Grey™, Surfmist®.

And galvanised Zincalume gives you the additional option of that elegantly clean unpainted look.


The Lysaght downpipe range also includes a full array of astragals, brackets (including adjustable brackets), pops, unidrops, square and round corners as well as adjustable offsets.

Don’t forget the BCA and Australian Standards require roof drainage systems to be designed by a licensed professional. Remember to plan for the following:

  • Rainfall intensity
  • Roof catchment area
  • Gutter & downpipe capacity
  • Gutter fall
  • Overflow potential

No1. Roofing and Building Supplies; we’re here to help.

LYSAGHT Downpipe

Lysaght Downpipes