Transverse roof flashings and capping fixings

Monday November 7 2016

To ensure consumer safety, the VBA conducts compliance audits and inspections of plumbing work throughout Victoria. The auditor's role is to ensure the plumbing work complies with all relevant plumbing laws.

Recent audits of roof installations have revealed a number of instances where transverse roof flashings (flashings) and capping fixings (cappings) have been incorrectly installed. Auditors have found examples where there were no sufficient fixings to prevent the roof flashing or capping from coming away from the structure. The risks of incorrect installation include damage to the building, and, more critically, serious personal injury, if a flashing or capping was to break free during extreme weather events such as high winds or storms.

Roof flashings and capping's are required to be installed and fixed to prevent dislodgement as well as being watertight upon completion of the installation. The roofing standard SA HB 39:2015 Installation code for metal roof and wall cladding specifies the frequency of the fixings for transverse flashings and capping's are to be no more than 300mm for pieced and concealed fastened roofs and every fourth rib on corrugated roofs.

Practitioners are reminded that all roofing (stormwater) work must comply within SA HB 39:2015 and that all of the requirements in handbook are mandatory.

For further information on the VBA audit function, or technical information on roof installations, please visit the VBA Website.

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