Australian standards and Code requirements we work to, with the source for each.
KLIP-LOK concealed-fix sheeting can be installed to a pitch as low as 1 degree in 0.48 mm base metal thickness, meeting AS/NZS 1562.1:2018. That is the usual answer for a flat rear extension where corrugated sheet would not comply.
Sheet metal roof and wall cladding in Australia is installed to AS/NZS 1562.1. It sets the minimum pitch, the fastening pattern and the side and end laps for each profile. Work that departs from it is what an insurer points at after a storm claim.
CUSTOM ORB corrugated profile is rated down to a minimum roof pitch of 5 degrees. Laid flatter than that, water sits in the pans instead of running off and the sheet holds moisture against the fasteners, no matter how well it is screwed down.
Last updated: 8 October 2026
Roof screw replacement in the Eastern Suburbs has its own rules: heritage areas, salt air and tight access all change how the job is done. Everything below links to the council or standard it comes from, so you can check it yourself.
In Paddington skylights are not allowed on the front or side roof planes, any skylight on the main roof is capped at 1.5 square metres, and rear planes are limited to 25 per cent transparent material.
Source: Woollahra DCP 2015, section C1.5.1Waverley maps the cliff tops of Dover Heights and Vaucluse, the North Bondi headlands and the coast down to Clovelly as frontline coastal. The dominant trees there are Norfolk Island pine, coastal banksia, melaleuca and bottlebrush, which pack a gutter gradually instead of blocking it in one drop.
Source: Waverley Council Street Tree MasterplanThe National Construction Code puts a home within 100m of breaking surf in the harshest corrosion category. Between 100m and 200m an AZ200 or AM150 coating is required, and only past 1km does the standard category apply. That changes fixings, flashings, gutters and downpipes.
Source: ABCB Housing Provisions (NCC 2022), Table 7.2.2aWaverley Council lists 17 heritage conservation areas, including Bondi Beach, Charing Cross and Queens Park. Inside them the roof material and colour are assessed, not waved through, and most external work needs consent.
Source: Waverley Council, Heritage Conservation AreasWoollahra DCP lists concrete roof tiles as intrusive and not permitted in the Paddington conservation area. Only natural slate, short-length corrugated galvanised iron or unglazed terracotta are allowed.
Source: Woollahra DCP 2015, Chapter C1We cover Bondi, Bondi Beach, North Bondi, Bondi Junction, Bronte, Tamarama, Clovelly, Coogee, South Coogee, Randwick, Kensington, Kingsford, Maroubra, Vaucluse, Dover Heights, Rose Bay, Double Bay, Paddington, Woollahra, Waverley, Queens Park, Charing Cross, Watsons Bay, Point Piper, Darling Point, Edgecliff, Bellevue Hill, Malabar, Little Bay, La Perouse and Matraville.
Not on every roof plane in the Paddington conservation area: Woollahra Council does not allow skylights on the front or side roof planes there, caps any skylight on the main roof at 1.5 square metres and limits rear planes to 25 per cent transparent material.
Twice a year suits most Eastern Suburbs homes, with a shorter cycle under coastal trees. Waverley’s frontline coastal zone, from the Dover Heights and Vaucluse cliff tops to Clovelly, is planted with Norfolk Island pine, coastal banksia, melaleuca and bottlebrush, which pack a gutter gradually all year instead of blocking it in one drop.
Roofs in the Eastern Suburbs corrode faster because many streets sit close to breaking surf, and salt attacks steel sheeting, fixings, flashings and gutters. The National Construction Code puts a home within 100m of breaking surf in the harshest corrosion category, requires an AZ200 or AM150 coating between 100m and 200m, and only applies the standard category beyond 1km.
The National Construction Code changes the metal your roof needs depending on how far you are from breaking surf. Under 100m is the harshest…
Read the guideWaverley Council lists 17 heritage conservation areas, and Woollahra Council's DCP does not permit concrete roof tiles in the Paddington conservation area. Here is…
Read the guideCoastal streets here are planted with Norfolk Island pine, banksia and melaleuca. They do not block a gutter in one autumn drop, they pack…
Read the guide