Australian standards and Code requirements we work to, with the source for each.
Any tiled roof pitched at less than 18 degrees has to have sarking underneath it, whatever the rafter or truss length. On older Sydney houses re-roofed before that rule bit, this is a common reason a tiled roof leaks in wind-driven rain.
AS 2050 governs how ridge and hip capping is bedded and pointed. Flexible pointing compound is what holds the capping as the roof moves; when it cracks and lets go, the capping lifts in wind and water tracks straight into the roof space.
AS 2050, the installation standard for concrete and terracotta roof tiles, applies to roofs pitched at 15 degrees or more. Below that the tile system falls outside the standard and a sheet metal profile is the compliant answer, not more bedding and pointing.
Last updated: 8 October 2026
Roof repointing in the Northern Beaches 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.
The standard warranty requires fresh water washing at least every six months of any roof area rain does not wash naturally, and does not cover failure to replace corroded fasteners. On a coastal home that means eaves, awnings and wall abutments need washing deliberately.
Source: BlueScope, Colorbond roofing sample warrantyCategory 1 vegetation carries a 100 metre buffer on the Council map and categories 2 and 3 carry 30 metres, so a property with no trees on it can still be mapped simply because of the reserve next door. Work on mapped land can pull in AS 3959 requirements.
Source: Northern Beaches Council, bush fire prone landThe Rural Fire Service advises against box gutters and complicated roof shapes on bushfire prone land because they trap debris, and warns that second storey gutters make last minute clearing dangerous. Removing litter from roof, valleys and gutters before summer is part of protecting the house.
Source: NSW Rural Fire ServiceBlueScope names Manly Beach as its metropolitan example of a surf marine environment, the harshest of its three salt classes under AS 4312. Wind, shelter and areas the rain never washes push the real corrosivity higher still, which is why the steel grade used here is not the one used inland.
Source: BlueScope Technical Bulletin TB-35 and AS 4312:2019Class 3 fasteners are only acceptable beyond 1km from marine influence. From 200m to 1km Class 4 is required, and inside 200m even Class 4 is not enough without checking with the supplier. Most of the ocean strip sits inside that band, so standard screws rust out long before the sheeting does.
Source: BlueScope TB-16 and AS 3566.2We cover Manly, Fairlight, Freshwater, Curl Curl, Dee Why, Collaroy, Narrabeen, Warriewood, Mona Vale, Newport, Bilgola, Avalon, Whale Beach, Palm Beach, Frenchs Forest, Belrose, Terrey Hills, Forestville, Killarney Heights, Balgowlah, Seaforth, Brookvale, Cromer, Elanora Heights, Bayview and Church Point.
The standard Colorbond warranty requires fresh water washing at least every six months of any roof area rain does not wash naturally, and it does not cover failure to replace corroded fasteners. On a Northern Beaches coastal home that means eaves, awnings and wall abutments need washing deliberately.
It can. On the Northern Beaches Council bush fire prone land map, Category 1 vegetation carries a 100 metre buffer and categories 2 and 3 carry 30 metres, so even a cleared block can be mapped and work on it can pull in AS 3959 requirements. The Rural Fire Service also advises clearing litter from roofs, valleys and gutters before summer.
Northern Beaches roofs corrode faster because much of the peninsula is a surf marine environment. BlueScope names Manly Beach as its metropolitan example of that class, the harshest of its three salt classes under AS 4312, and wind, shelter and areas the rain never washes push real corrosivity higher still.
Manly heritage areas keep the original roof form, bushfire buffers reach 100 metres and only 10 per cent of a canopy can be pruned…
Read the guideIf you live between Manly and Palm Beach, your gutters work harder than almost anywhere else in Sydney. Salt air corrodes metal…
Read the guide