Rainwater
Goods
Complete rainwater management systems for residential and commercial buildings. COLORBOND® gutters and downpipes in quad, fascia and half-round profiles. BAL-rated aluminium and stainless gutter guard mesh, ember guard, solar panel bird protection and a full range of fittings and accessories.
COLORBOND® Gutters &
Downpipes
Matched to your roof and wall sheeting colour
COLORBOND® Colour Selection
Select a colour to filter the catalogue to matching SKUs. All gutters, downpipes and accessories are available in the full COLORBOND® range.
COLORBOND® and colour names are registered trademarks of BlueScope® Steel Limited. Swatches are indicative only — refer to physical samples for colour matching.
Product Catalogue
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E-E-A-T Technical Reference
Rainwater Goods Specifications
Gutter profiles, sizing, material specifications, BAL ratings and applicable Australian standards for rollformed rainwater goods.
Gutter Profile Specifications
| Profile | Sizes Available | Typical Application | Matching Downpipe | Standard |
|---|---|---|---|---|
| Quad (Ogee) | 115 mm, 150 mm | Residential; most common Australian profile | 65×50 mm or 75×50 mm square | AS/NZS 2179.1 |
| Fascia | 150 mm, 200 mm | Residential and commercial; integrated fascia/gutter | 75×50 mm square | AS/NZS 2179.1 |
| Half Round | 125 mm, 150 mm | Heritage, period and architectural buildings | 90 mm or 100 mm round | AS/NZS 2179.1 |
Gutter Guard Mesh — BAL Rating Guide
| Aperture | Material | BAL Rating | Application | Standard |
|---|---|---|---|---|
| 5.4 mm | Aluminium | Non-BAL rated | Leaf and debris protection; low fire risk areas | N/A |
| 3.5 mm | Aluminium | BAL-12.5 to BAL-29 | Leaf and ember protection; medium fire risk | AS 3959 |
| 2.0 mm (1.9 mm woven) | Aluminium | BAL-12.5 to BAL-FZ | Ember guard; high and extreme fire risk zones | AS 3959 |
| 2.0 mm (1.9 mm woven) | Stainless Steel 316 | BAL-FZ | Extreme fire risk; coastal and high-corrosion zones | AS 3959 |
COLORBOND® Steel
Pre-painted Zincalume® substrate
COLORBOND® steel is a pre-painted steel product manufactured by BlueScope® Steel. The substrate is Zincalume® (zinc/aluminium alloy coated steel) with a baked-on polyester paint finish. Provides long-term corrosion resistance and colour retention in Australian conditions.
Zincalume® Steel
Zinc/aluminium alloy coated steel
Zincalume® is a zinc/aluminium alloy coated steel product manufactured by BlueScope® Steel. The alloy coating (55% aluminium, 43.5% zinc, 1.5% silicon) provides superior corrosion resistance compared to galvanised steel. Used as the substrate for COLORBOND® and as an unpainted product.
AS/NZS 2179.1
Rainwater goods standard
AS/NZS 2179.1 specifies the requirements for rollformed steel rainwater goods including gutters, downpipes and accessories. Covers dimensional tolerances, material specifications, coating requirements and performance testing for products used in Australian and New Zealand buildings.
BAL Rating
Bushfire Attack Level
BAL (Bushfire Attack Level) ratings are defined in AS 3959 Construction of Buildings in Bushfire-Prone Areas. Ratings range from BAL-12.5 (low risk) to BAL-FZ (flame zone). Gutter guard mesh aperture size and material must be selected to comply with the BAL rating of the site.
Gutter Sizing
Based on roof catchment area
Gutter size is determined by the roof catchment area (m²), roof pitch, rainfall intensity and downpipe spacing. AS/NZS 3500.3 (Stormwater Drainage) provides sizing tables. As a general guide: 115 mm quad suits up to ~50 m² catchment; 150 mm quad suits up to ~80 m² catchment per downpipe.
Downpipe Sizing
Matched to gutter capacity
Downpipe size must be matched to the gutter capacity and roof catchment area. A 65×50 mm square downpipe has a flow capacity equivalent to approximately 90 mm round. A 75×50 mm square downpipe is equivalent to approximately 100 mm round. Refer to AS/NZS 3500.3 for sizing calculations.
Applicable Standards
AS/NZS 2179.1
Rainwater Goods — Steel
Specifies requirements for rollformed steel rainwater goods including gutters, downpipes and accessories. Covers dimensional tolerances, material specifications, coating requirements and performance testing.
AS/NZS 3500.3
Stormwater Drainage
Provides sizing tables and design requirements for stormwater drainage systems including gutters and downpipes. Used to determine correct gutter and downpipe sizes based on roof catchment area and rainfall intensity.
AS 3959
Construction in Bushfire-Prone Areas
Defines BAL ratings and construction requirements for buildings in bushfire-prone areas. Specifies gutter guard mesh aperture sizes and materials required for each BAL rating from BAL-12.5 to BAL-FZ.
AS/NZS 2728
Prefinished/Prepainted Sheet Metal Products
Specifies performance requirements for prefinished (prepainted) sheet metal products including COLORBOND® steel used in rainwater goods. Covers paint adhesion, flexibility, corrosion resistance and colour retention.
NCC (BCA) Volume 1 & 2
National Construction Code
The NCC references AS/NZS 3500.3 for stormwater drainage design and AS 3959 for bushfire construction requirements. Compliance with these standards is required for building approval in all Australian states and territories.
AS/NZS 4534
Zinc and Zinc/Aluminium Coatings on Steel Wire
Referenced for the wire coating requirements of gutter guard mesh products. Specifies minimum zinc coating mass for galvanised wire used in mesh applications.
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