Victoria is heading into spring with renewed focus on bushfire preparation.
AFAC released its Seasonal Bushfire Outlook for Spring 2026 on 19 August, identifying heightened fire potential across parts of Victoria, driven in part by dry conditions. The CFA has highlighted the far south-west, the Surf Coast, areas west of Geelong through to the southern Wombat Forest and East Gippsland as areas expected to experience above-normal fire conditions this spring.
For building owners and construction professionals, bushfire preparation is often discussed in terms of vegetation, defendable space and major building materials. But at roof level, some of the most important vulnerabilities can be much smaller.
A roof may be predominantly non-combustible and still contain gaps at ridges, penetrations, vents, skylights, wall junctions and other interfaces. That is where careful flashing and sealing details become important.
Bushfire resilience is often about controlling openings
The BPC guidance recommends sealing around roofing and roof penetrations as part of bushfire preparation, as well as keeping gutters clear of leaves and other debris.
Australian Steel Institute guidance also emphasises the importance of following an appropriate compliance pathway for bushfire-prone construction. Its technical material explains how ember-resistant mesh and non-combustible materials can form part of relevant roof details, with the precise requirements depending on the selected compliance pathway and Bushfire Attack Level.
That distinction matters. A piece of metal is not automatically a compliant bushfire detail simply because it is non-combustible. The complete assembly needs to be designed and installed in accordance with the applicable requirements.
Flashings sit at many of the vulnerable junctions
Consider how many transitions exist across a typical roof.
A ridge flashing closes the meeting point between roof slopes. Apron flashings protect roof-to-wall junctions. Penetration flashings surround pipes, vents and other services. Parapet cappings protect exposed wall tops. Valleys and box gutters collect and redirect water through more complex parts of the roof.
Each of these details has to keep performing its normal weatherproofing job while also fitting within the bushfire strategy for the building.
That can create competing design considerations. A roof may require ventilation for condensation management but also need protection against ember entry. A gap may be necessary for drainage but cannot simply be left unprotected. A seal needs to resist weather exposure without creating a dam that traps water.
This is why the roof should be considered as a system rather than a collection of individual components.
Rainwater goods deserve attention too
Bushfire preparation does not stop at the flashings.
Leaves and other combustible debris can accumulate in gutters and around rainwater goods, which is why regular cleaning remains important. On projects using box gutters, downpipes or COLORBOND® steel rainwater heads, the drainage design should also allow practical inspection and maintenance rather than creating inaccessible debris traps.
Material selection is another part of the picture. Steel flashings, COLORBOND® steel components and aluminium cappings are non-combustible materials, but their suitability still depends on the complete detail, the location of the building and the applicable bushfire construction requirements.
Small details are easier to solve on the drawing
For new construction and major reroofing work, bushfire detailing is best resolved before fabrication.
When ridge profiles, parapet caps, penetrations and roof-to-wall junctions are clearly documented, custom folded metal can be manufactured to match the intended detail instead of being adapted on site.
That becomes particularly valuable on architecturally complex roofs, where standard profiles may not provide the cover, angle or geometry required.
PPC Flashings manufactures custom non-combustible metal flashings, cappings and rainwater goods to suit supplied project specifications. For projects in bushfire-prone areas, our fabrication capability can support the roof and wall details developed by the project’s designer, builder and roofing team.
Bushfire construction requirements vary by site, building type and Bushfire Attack Level. Always confirm the applicable NCC provisions, Australian Standards and approved project documentation before specifying or installing a particular flashing or roof detail.
The information contained in this news post is provided by way of general information only and has not been prepared with your specific needs in mind. Before application in a particular situation, we recommend that you obtain expert advice confirming the suitability of the services and/or products and information in question for the application proposed.