Flashings and Valleys on Slate Roofs in Adelaide

A US National Park Service brief on historic slate roofs (guidance for American buildings, not an Australian rule) says flashings are the weakest point in any roof, and that for a leak you should not assume the slates are leaking: gutters, valleys and flashings are more likely.

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What flashings and valleys on slate roofs in Adelaide actually involves

A US National Park Service brief on historic slate roofs (guidance for American buildings, not an Australian rule) says: Flashings are the weakest point in any roof. On leaks it says: Do not assume the slates are leaking. Gutters, valleys and flashings are more likely candidates than the slates.

Grey metal flashing around the base of a brick chimney on a slate slope — flashings and valleys, Adelaide. Illustrative example.

Which authority flashing falls under

Roof plumbing, which covers gutters and flashings, may be a separate regime from building work in South Australia, and this site has not read it. This page therefore says nothing about who may fit flashings: ask whoever quotes which authority covers them.

Ask the provider what the flashings and valleys are made of in the quote, and what is being kept or replaced.

Check which rules apply to your job