Buy COLORBOND® Ridge Flashings Online for Strong and Secure Roof Protection

Finish your roofing project with precision using COLORBOND® steel ridge flashings. Designed to seal the peak of your roof where two slopes meet, ridge flashings provide essential protection against water ingress and wind uplift while delivering a clean and professional look.

Available in a range of sizes and matching COLORBOND® colours, our ridge flashings are made from premium-grade steel and built to perform in harsh Australian conditions. Whether you’re a tradie ordering in bulk or a homeowner completing a roofing upgrade, you can shop confidently knowing you’re getting quality materials delivered fast.

Need other roofing essentials? Explore our full range of COLORBOND® Steel Roofing Accessories to complete your order in one go.

What are ridge flashings?

Ridge flashing, also called ridge capping, is the folded metal cover fitted over the top junction where two roof planes meet at the peak, sealing the gap between the sheets and stopping wind-driven rain and dust getting into the roof space. ClickSteel stocks it as ColorBond steel Ridge Flashing and Zincalume Ridge Flashing, plus roll-top profiles including the COLORBOND steel .40 Roll Top Ridge and the heavier COLORBOND steel ULTRA .48 Roll Top Ridge for coastal or high-corrosion sites. Ridge capping is folded to the roof’s pitch angle so both sides sit flush against the sheeting.

How do you attach ridge cap flashing?

Ridge cap flashing is fixed with roofing screws driven through the crest of the roof sheeting profile into the purlins or battens below, typically at every second or third rib depending on the wind classification for the site. A foam or fibre filler strip is generally run underneath the ridge to close the profile gaps and stop weather and vermin getting in, and products like the COLORBOND steel .40 Roll Top Ridge or COLORBOND steel MATT .40 Roll Top Ridge are folded to the correct angle beforehand to match the roof pitch. As ClickSteel supplies the materials rather than installation, fixing spacings and screw types should follow the roof sheeting manufacturer’s install guide or your roofer’s specification.

How do you calculate the ridge flashing angle?

The ridge flashing angle is set by the pitch of the roof on each side of the ridge, and where both sides have the same pitch the flashing simply folds symmetrically at 180 degrees minus twice the roof pitch. For an asymmetric roof, each side’s fold is calculated separately against its own pitch so the flashing sits flat against both planes without gapping. ClickSteel folds ridge products such as the ColorBond steel Ridge Flashing and ZINCALUME .40 Roll Top Ridge to the angle you specify when ordering, so it is worth confirming your roof pitch, from the truss design or a pitch gauge on site, before placing the order.

What are the recommended angles for flashings?

Flashing angles are set to match the specific roof pitch of the job rather than a single fixed figure, since Australian roofs commonly range from around 5 degrees on skillion and low-pitch roofs up to 30 degrees or more on traditional gable roofs. Ridge products such as the COLORBOND steel .40 Roll Top Ridge and COLORBOND steel ULTRA .48 Roll Top Ridge are custom folded to the angle you provide, while barge and gable flashings are similarly matched to pitch. Always measure or confirm the actual roof pitch before ordering flashing so the fold angle is correct for a tight, weatherproof fit.

Is a roof ridge cap necessary?

Yes, ridge capping is effectively necessary on any pitched metal roof, because without it the gap along the ridge line where the two roof planes meet is left open to wind, rain and dust. It is standard practice on every COLORBOND steel and Zincalume roof and is specified in the roofing manufacturer’s installation requirements. ClickSteel supplies ridge flashing in a range of finishes, from the standard Zincalume Ridge Flashing to the COLORBOND steel MATT .40 Roll Top Ridge for a low-sheen look, so there is no reason to skip it.

How long does ridge capping last?

Ridge capping made from COLORBOND steel typically lasts as long as the roof sheeting it is paired with, commonly in the order of decades, depending on the coating grade, local climate and how close the property is to the coast or industrial pollutants. Products like the COLORBOND steel ULTRA .48 Roll Top Ridge use a heavier gauge and enhanced coating for better durability in harsher environments than the standard COLORBOND steel .40 Roll Top Ridge. Regular checks for loose fixings or worn sealant strips help it reach its full service life.

What goes under a ridge cap on a metal roof?

Under a ridge cap, installers typically fit a foam or fibre profile filler strip that follows the corrugations of the roof sheeting, closing the gaps left by the sheet profile so wind, rain, dust and vermin cannot get through underneath the cap. This sits between the top of the roof sheets and the ridge flashing itself, whether that is a ColorBond steel Ridge Flashing or a COLORBOND steel .40 Roll Top Ridge. ClickSteel supplies the ridge flashing; the filler strips and fixing details should be sourced and fitted according to the roof sheeting manufacturer’s specification or your roofer’s standard practice.