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What Is Barge Capping?
Barge capping is the steel flashing that runs along the gable (barge) edge of a roof, capping the join between the barge board and the roof sheeting. It does two jobs: it seals that edge against wind-driven rain, and it gives the roofline a clean, finished look. Barge capping and barge flashing are the same component — "capping" describes the cover that sits over the edge, "flashing" describes the waterproofing it provides.
Barge Capping or Barge Board Flashing?
You'll see this part called barge capping, barge flashing, barge board flashing or bargeboard flashing — they all describe the same thing. Whatever the term on your plans or quote, this is the profile that finishes and weatherproofs the gable edge of a metal roof.
Designed to Suit TRIMDEK®
This barge capping is shaped to suit TRIMDEK® roofing profiles, so it sits cleanly over the sheeting with the right cover and break for a weather-tight seal. Capping matched to your roof profile is what keeps the barge line free of the gaps where wind and water get in.
Profile & Specifications
- Hook: 10mm
- Rise: 90mm
- Roof cover: 140mm
- Break: 30mm
- Material: genuine COLORBOND® steel, 0.55mm BMT
- Length tolerance: +200mm / –0mm
- Colours: full COLORBOND® range
Where Barge Capping Is Used
Barge capping is used wherever a roof meets a gable end — on homes, sheds, garages and commercial roofing. On metal roofs it's the standard way to finish and protect the barge line, carrying water away from the edge rather than letting it track behind the sheeting.
Custom Barge Flashings, Made to Measure
Need a length or angle that isn't standard? We manufacture custom barge flashings to your supplied measurements. Download the Custom Flashings Order Form, email it to sales@metalroofingonline.com.au, and we'll quote your job.
Genuine BlueScope Steel
Made from 100% genuine BlueScope COLORBOND® steel in 0.55mm BMT and backed by the BlueScope warranty, this capping is built for Australian conditions — UV, driving rain and coastal exposure.
Frequently Asked Questions
What is barge capping?
It's the flashing that caps and weatherproofs the gable (barge) edge of a roof, sealing the join between the barge board and the roof sheeting.
Is barge capping the same as barge flashing?
Yes — barge capping, barge flashing and barge board flashing all refer to the same part.
Does this suit TRIMDEK® roofing?
Yes. The profile is shaped to suit TRIMDEK® sheeting for a clean, weather-tight finish.
What size is it?
10mm hook × 90mm rise × 140mm roof cover × 30mm break, in 0.55mm BMT COLORBOND® steel.
Can I get a custom length?
Yes — we manufacture custom barge flashings to your supplied measurements. Just send through the order form.
Is this genuine COLORBOND® steel?
Yes — 100% genuine BlueScope COLORBOND®, backed by the BlueScope warranty.
How long does delivery take?
Approx. 4–7 working days, depending on your location.
