What is gable trim on a roof?
Gable trim, also called gable roll, is a rolled metal strip fitted along the top edge of a barge board or gable end to give a neat, rounded finish and shed water away from the timber underneath. ClickSteel stocks it as the COLORBOND steel 38MM Gable Roll | 2400MM and the Colorbond steel 50MM Gable Roll, both supplied in convenient stock lengths for straightforward gable ends. It sits over the barge capping line and is one of the smaller finishing flashings used on a gable roof.What is a gable flashing?
A gable flashing is the general term for the metal trims that finish and weatherproof a gable end, covering barge boards and roll edges so water cannot track behind the cladding or into the roof frame. On the gable roll side of that job, ClickSteel offers the Colorbond steel 50MM Gable Roll and the ZINCALUME 38MM Gable Roll Stock Length 2.4m, both roll-formed to a consistent profile for a clean line along the ridge of the gable. Colour and material, COLORBOND steel or Zincalume, are usually matched to the roof sheeting and other flashings on the job.Do you need gable trim?
Gable trim is not always compulsory but it is standard practice on gable-roofed homes and sheds because it protects the exposed top of the barge board from water and improves the overall look of the roofline. Most builders and roofers specify it as a matter of course, choosing a size such as the COLORBOND steel 38MM Gable Roll | 2400MM or the ZINCALUME 50MM Gable Roll to suit the barge board width and roof pitch. If your gable end is otherwise well flashed and sealed, gable roll is more of a finishing and durability upgrade than a strict requirement, but it is cheap insurance against long-term water ingress.What is the trim on the edge of a roof called?
Depending on which edge, the trim on a roof edge has different names. Along the sloping gable end it is barge flashing or barge capping, and the small rounded strip that finishes the top of that barge is the gable roll, such as ClickSteel’s Colorbond steel 50MM Gable Roll or ZINCALUME 38MM Gable Roll Stock Length 2.4m. Along the horizontal eaves edge the trim is fascia, and at the roof peak it is ridge capping. Each has a distinct profile and job, so it pays to specify the right one when ordering.Where does gable trim go?
Gable trim runs along the top edge of the barge board on a gable roof, from the eaves up to the ridge on each raked end of the roof. It is fitted after the barge flashing is in place, rolling over the top edge to seal and finish it. ClickSteel’s stock length options, the COLORBOND steel 38MM Gable Roll | 2400MM and the ZINCALUME 50MM Gable Roll, are supplied at 2.4m lengths for straightforward runs, and multiple lengths are simply lapped or butted along longer gable ends.What are the Australian standards for roof flashings?
Roof and wall flashings in Australia are primarily governed by AS/NZS 1562.1, which covers the design and installation of sheet roof and wall cladding, alongside the National Construction Code, setting out requirements for overlap, fixing and weatherproofing based on roof pitch and wind classification. Manufacturer installation guides for COLORBOND steel and Zincalume products also apply and generally align with these standards. ClickSteel supplies flashing components, including gable roll options like the Colorbond steel 50MM Gable Roll, cut and formed to specification, but compliance for your specific building is something to confirm with your builder, roofer or local council, since wind region and roof pitch affect the exact requirements.
