Repair Systems — 04
Box gutter lining systems — Colorbond steel
Technical product reference for Colorbond steel box gutter lining systems. Covers product classification, AS 1562.3 requirements, system selection, fabrication, and brand comparisons for Australian Class 2 strata building box gutter remediation.
What are Colorbond steel box gutter lining systems?
Colorbond steel box gutter lining systems consist of pre-painted BlueScope Colorbond steel sheet, custom roll-formed by a specialist roofing or sheet metal fabricator to the required box gutter profile and installed within the existing box gutter structure. Unlike external quad or half-round gutters, box gutters are internal gutters built into the roof structure — their failure typically causes water ingress directly into the building fabric and is a critical defect in Class 2 strata buildings.
Product Reference
3 products — 2 brands — Colorbond steel box gutter lining — scroll to view all
BlueScope Colorbond Ultra Steel (box gutter lining)
Pre-painted Colorbond steel — box gutter lining — custom roll-formed
System Description
BlueScope Colorbond Ultra Steel is BlueScope's premium pre-painted steel product with an enhanced coating system providing superior corrosion resistance compared to standard Colorbond. For box gutter lining applications, Colorbond Ultra steel coil is supplied to a specialist roofing or sheet metal fabricator who roll-forms the steel to the required box gutter profile on site or in their workshop. The fabricator determines the profile geometry based on the hydraulic design, catchment area, and existing gutter dimensions. Colorbond Ultra provides the widest colour range of any Colorbond product and is particularly suited to Class 2 strata buildings in coastal, industrial, or high-corrosivity environments where the extended coating durability is warranted. The BlueScope warranty for Colorbond Ultra is the longest in the Colorbond range — confirm current warranty terms and conditions with BlueScope Steel. BMT (base metal thickness) selection — typically 0.55BMT for residential or light commercial and 0.75mm to 1.0mm for heavier-duty or wider gutter applications — must be confirmed by the roofing engineer or fabricator against the box gutter design and AS 1562.3 minimum thickness requirements. Do not specify Colorbond Ultra based on colour alone — confirm the steel grade, BMT, and coating system against the project environment and AS 1562.1.
Technical Properties
- Pre-painted Colorbond Ultra steel — enhanced ACTIVATE technology coating system — superior corrosion resistance compared to standard Colorbond
- BMT range: 0.55mm to 1.0mm — confirm required BMT against AS 1562.1 and hydraulic design
- Full Colorbond colour range — widest colour selection in the Colorbond product family
Limitations
- Not a standard stock item — Colorbond Ultra box gutter lining must be custom roll-formed by a specialist fabricator — lead time must be confirmed before programming works
- BMT must be specified by the roofing engineer — do not assume 0.55BMT is adequate for all box gutter applications
- Colorbond steel must not be in direct contact with copper, lead, or treated timber without appropriate separation — dissimilar metal corrosion risk
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Lysaght Custom-Formed Colorbond Box Gutter
Custom-formed Colorbond box gutter — Lysaght fabrication
System Description
Lysaght is BlueScope's principal steel distribution and fabrication business in Australia. Lysaght fabricates and supplies custom-formed Colorbond box gutter profiles to contractor specification through their national branch network. For Class 2 strata box gutter remediation projects, Lysaght can supply custom-profiled Colorbond box gutter sections fabricated to the dimensions required by the roofing engineer or hydraulic design. Lysaght stock standard box gutter and wide-pan profiles and can custom roll-form non-standard profiles where required. Specify the required profile dimensions, BMT, Colorbond colour, and required joint method when requesting a quotation. Lysaght branches can provide technical advice on steel selection and fabrication capability. Their national branch network provides good geographic coverage across Australia — confirm the nearest branch with fabrication capability before specifying. Lysaght-fabricated Colorbond box gutters use BlueScope Colorbond steel as the base material.
Technical Properties
- Custom-formed Colorbond box gutter fabricated by Lysaght to contractor-specified profile dimensions
- Fabricated from BlueScope Colorbond steel — confirm grade (standard Colorbond vs Colorbond Ultra) when ordering
- Standard box gutter and wide-pan profiles stocked at major branches — non-standard profiles custom-formed on request
Limitations
- Lead time for custom-formed profiles varies by branch and current workload — confirm before programming works
- BMT and profile design must be confirmed by the roofing engineer against AS 1562.1 — Lysaght fabrication does not substitute for design engineering
- Confirm Colorbond grade (standard vs Ultra) with Lysaght at time of order — do not assume Ultra is the default
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Stramit Colorbond Box Gutter
Custom-formed Colorbond box gutter — Stramit fabrication
System Description
Stramit Building Products is an alternative Colorbond steel fabrication supplier for custom box gutter profiles. Stramit fabricates roofing and gutter products from BlueScope Colorbond steel through their national branch network, providing a competitive alternative to Lysaght for contractors and project managers specifying custom Colorbond box gutter lining. The selection process and specification requirements are similar to Lysaght — provide the required profile dimensions, BMT, Colorbond colour, and joint type at the time of enquiry. Stramit branch coverage differs from Lysaght in some regions — confirm which supplier has a branch with appropriate fabrication capability closest to the project location. For large box gutter remediation projects, obtaining quotations from both Lysaght and Stramit is recommended to ensure competitive pricing. Both suppliers fabricate from BlueScope Colorbond steel and the final product performance of correctly fabricated and installed Colorbond box gutter lining is comparable between the two suppliers.
Technical Properties
- Custom-formed Colorbond box gutter fabricated by Stramit to contractor-specified profile dimensions
- Fabricated from BlueScope Colorbond steel — confirm grade when ordering
- National branch network — confirm local coverage and fabrication capability before specifying
Limitations
- Branch coverage differs from Lysaght in some regions — confirm local availability before specifying
- Lead time for custom profiles varies — confirm before programming works
- BMT and profile design must be confirmed by the roofing engineer against AS 1562.1
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of Colorbond steel box gutter lining products. Confirm all product selections against the current manufacturer TDS before specifying.
| Product | Brand | Steel grade | Colour options | Thickness | Custom profile |
|---|---|---|---|---|---|
| Colorbond Ultra Steel | BlueScope | Colorbond Ultra — ACTIVATE technology | Full Colorbond range — widest selection | 0.55BMT to 1.0mm | Yes — custom roll-formed by fabricator to specification |
| Lysaght Custom Box Gutter | Lysaght (BlueScope Distribution) | BlueScope Colorbond (confirm grade — standard or Ultra) | Full Colorbond range | Confirm at order | Yes — standard and wide-pan profiles, non-standard on request |
| Stramit Colorbond Box Gutter | Stramit Building Products | BlueScope Colorbond (confirm grade at order) | Full Colorbond range | Confirm at order | Yes — custom-formed to specification |
Do not confuse Colorbond box gutter lining with:
- Quad gutter (external gutter profile) — quad and half-round gutters are external, fascia-mounted gutters. Box gutters are internal gutters built into the roof structure. These are fundamentally different products used in different locations.
- Copper lining systems — copper box gutter lining is a separate premium/heritage specification requiring a specialist copper plumber. Listed separately on the copper lining page.
- Aluminium lining systems — aluminium sheet box gutter lining is a separate product category listed on the aluminium lining page. Aluminium and Colorbond have different joining, painting, and dissimilar metal requirements.
- Colorbond roofing sheets — Colorbond roof cladding panels are not box gutter products. Custom roll-forming to a box gutter profile is a separate fabrication process.
- UPVC gutter systems — plastic gutter systems are external residential products not suited to structural box gutter lining applications.
Disclaimer
Box gutter design must comply with AS 1562.3 and be sized by a licensed hydraulic engineer or roofing engineer for the catchment area. This page provides general technical information only. Final product selection must be confirmed against the current manufacturer technical data sheet, project specification, hydraulic design, and AS 1562.3 requirements. Do not rely on this reference as a substitute for professional engineering or roofing consultant advice.