Australian standards and Code requirements we work to, with the source for each.
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.
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.
Last updated: 8 October 2026
Roof repair in the Inner West has its own rules: heritage areas 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.
Marrickville DCP requires on site detention for any extension adding 40 square metres or more of roof or paving, and allows a 5,000 litre retention tank instead on lots over 200 square metres, plumbed to toilets, laundry and taps.
Source: Marrickville DCP 2011, section 2.25Inner West Council advises that almost any home built or renovated before the mid 1980s is likely to contain asbestos, commonly in fibro sheeting, roofing and guttering. Over 10 square metres, or anything friable, legally needs a licensed removalist.
Source: Inner West Council, AsbestosThe Annandale conservation area records terracotta, slate and some iron roofing, with a skyline of chimneys, decorative fire-wall dividers between terraces, ridge capping and finials. Those party walls between attached terraces are a recurring source of flashing and box gutter leaks.
Source: Inner West Council, C1 Annandale HCAInner West gives only two free skip bin permits per property per year in unmetered streets, and one in metered areas. The permit has to be in hand before the bin arrives and takes two business days. On narrow terrace streets where the bin cannot fit on the property, that permit is part of the job.
Source: Inner West Council, skip binsThe whole suburb is a conservation area, recognised as Australia first planned garden suburb, with a period of significance from about 1900 to the 1940s. In practice almost every roof job in Haberfield is a heritage job.
Source: Inner West Council, C54 Haberfield HCAWe cover Haberfield, Ashfield, Summer Hill, Croydon, Leichhardt, Annandale, Balmain, Rozelle, Lilyfield, Marrickville, Dulwich Hill, Petersham, Stanmore, Newtown, Enmore, St Peters, Tempe, Sydenham and Lewisham.
In the former Marrickville council area you may. The Marrickville DCP requires stormwater detention for any extension adding 40 square metres or more of roof or paving, and allows a 5,000 litre retention tank instead on lots over 200 square metres, plumbed to toilets, laundry and taps.
If the house was built or renovated before the mid 1980s, probably. Inner West Council advises that almost any home of that age is likely to contain asbestos, commonly in fibro sheeting, roofing and guttering, and more than 10 square metres, or anything friable, legally needs a licensed removalist.
Inner West terrace roofs leak at the party wall because that is where flashings and box gutters meet the shared fire wall. The Annandale conservation area records decorative fire-wall dividers between attached terraces, and those walls are a recurring source of flashing and box gutter leaks.
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 guideHaberfield is a heritage conservation area end to end and its DCP allows only four roofing materials. What Inner West Council controls on a…
Read the guideThe 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 guide