Repair Systems — 04
Step flashing systems — Colorbond steel
Technical product reference for Colorbond steel step flashing systems used in roof flashing failure remediation. Covers product selection, forming methods, AS 1562.1 requirements, colour matching, and brand comparisons for Australian residential and strata buildings.
What are Colorbond steel step flashing systems?
Colorbond steel step flashings are factory-pre-painted steel flashings formed on site by a licensed roof plumber to seat under successive tile courses and lap up a wall or parapet face at a stepped wall-to-roof abutment junction. The step-and-soaker detail is the standard method for waterproofing the junction between a tiled pitched roof and an adjacent vertical wall or parapet on Australian residential and strata buildings.
Product Reference
2 products — 2 brands — Colorbond steel step flashing systems only — scroll to view all
Lysaght/BlueScope Colorbond Step Flashing
Pre-painted Colorbond steel step flashing — AS 1562.1 — BlueScope Colorbond
System Description
Lysaght/BlueScope Colorbond step flashing is the standard specification for stepped wall-to-roof abutment flashing repairs on tiled pitched roofs across Australian residential and strata buildings. The Colorbond steel is factory-pre-painted in BlueScope's full Colorbond colour range, allowing the roofer to match the existing roof colour or specify a contrasting colour where required by the client or strata committee. The flashing material is supplied as flat coil or pre-cut strip and is site-formed by the licensed roof plumber using a brake press or hand folder to match the required step profile and tile gauge. The step flashing seats under each tile course and laps up the wall or parapet, with soaker flashings interlaced between tiles at the wall junction. The step profile and minimum upstand dimensions are governed by AS 1562.1 and the tile manufacturer's installation requirements — confirm both before cutting and forming. BlueScope Colorbond is the industry benchmark for pre-painted steel step flashing in Australia. The steel substrate provides good resistance to thermal movement and mechanical damage during installation. Colour durability is governed by BlueScope's Colorbond warranty conditions. Confirm current colour availability and lead time with Lysaght or BlueScope trade supply before ordering for strata projects where specific colour matching is required.
Technical Properties
- Factory-pre-painted Colorbond steel — full BlueScope Colorbond colour range — colour-matched to existing roof
- Site-formed by licensed roof plumber — brake press or hand folder — profile matches tile gauge and wall profile
- Step and soaker detail — step flashing under each tile course, soakers interlaced between tiles at wall junction
Limitations
- Step profile and minimum upstand dimensions must comply with AS 1562.1 and the tile manufacturer's installation guide — confirm before forming
- Galvanic corrosion risk where Colorbond steel contacts copper or lead — confirm compatibility and use isolating tape or sleeve where copper pipe penetrations are present near the flashing
- Pre-painted coating is not site-repairable with Colorbond paint — damaged or scratched areas must be touched up with an approved touch-up product or the flashing replaced
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
Stramit Colorbond Step Flashing
Pre-painted Colorbond steel step flashing — Stramit — AS 1562.1
System Description
Stramit Colorbond step flashing is formed from Colorbond coil and provides an alternative supply channel to BlueScope/Lysaght for step and soaker flashing at wall-to-roof abutment junctions on tiled pitched roofs. Stramit is a major Australian roll-forming and steel products manufacturer and distributor with broad national trade supply coverage. The Colorbond steel is factory-pre-painted and is available in standard Colorbond colours. Step flashing is site-formed by the licensed roof plumber in the same manner as BlueScope/Lysaght product — flat coil or pre-cut strip is brake-pressed or hand-folded on site to match the required step profile and tile gauge. AS 1562.1 and tile manufacturer installation requirements apply equally to all Colorbond step flashing regardless of brand — minimum upstand, step height, soaker lap dimensions, and fixings must all comply. Stramit product may offer competitive pricing or better regional availability compared to BlueScope/Lysaght depending on the project location. Confirm current colour range, available thicknesses, and regional stock with Stramit trade supply before ordering.
Technical Properties
- Colorbond steel — factory-pre-painted — standard Colorbond colour range
- Alternative supply channel to BlueScope/Lysaght — Stramit national trade supply network
- Site-formed by licensed roof plumber — same forming method as BlueScope/Lysaght product
Limitations
- Confirm current Colorbond colour range with Stramit — may differ from BlueScope/Lysaght range in specific colours or finishes
- Same galvanic corrosion risk as BlueScope/Lysaght where Colorbond steel contacts copper or lead — confirm compatibility
- Step profile and upstand dimensions must comply with AS 1562.1 and tile manufacturer requirements — no difference to BlueScope/Lysaght product
PROCUREMENT SOURCES
Confirm suitability with the current manufacturer TDS before specifying or applying.
System Comparison
Side-by-side comparison of Colorbond steel step flashing systems. Confirm all product selections against the current manufacturer data before specifying.
| Product | Brand | Material | Painted | Colour range | Forming method | Standard | Primary use |
|---|---|---|---|---|---|---|---|
| Colorbond Step Flashing | Lysaght / BlueScope | Colorbond steel | Factory pre-painted | Full BlueScope Colorbond range | Site-formed — brake press or hand folder | AS 1562.1 | Step and soaker flashing at wall-to-roof abutments — tiled pitched roofs |
| Colorbond Step Flashing | Stramit | Colorbond steel | Factory pre-painted | Standard Colorbond colours — confirm range with Stramit | Site-formed — brake press or hand folder | AS 1562.1 | Step and soaker flashing at wall-to-roof abutments — alternative supply channel |
Do not confuse Colorbond step flashing with:
- Lead step flashing (Austral Lead Code 4 sheet) — a different material entirely, heavier, malleable, and self-sealing at overlaps — used for heritage buildings and high-specification chimney and tiled roof applications — listed on the Chimney — lead page
- Aluminium step flashing (Capral, Metalcorp, or custom fabricator) — lighter, mill-finish or pre-painted aluminium sheet — listed on the Step — aluminium page — precautions for dissimilar metal contact apply
- Valley flashings — a different roofing element at the valley junction between two roof planes — a different product category
- Penetration flashing collars — preformed collar systems for pipes and vents through roof — listed on the Penetration collars page
- Colorbond roofing sheet — bulk roofing material, not a step flashing product — step flashings are formed from coil or pre-cut strip
Disclaimer
Step flashing must comply with AS 1562.1 and tile manufacturer requirements. Final product selection must be confirmed against the current manufacturer technical data sheet, project specification, tile profile, wall construction, and mortar joint type. Installed by a licensed roofing contractor. Do not rely on this reference as a substitute for professional engineering or roofing consultant advice.