Cedar Roofing near you

NCC Volume Two, clause H1D7, is the list of what a roof may be. Metal roofing points at AS 1562.1. Plastic sheet roofing points at AS 1562.3. Roof tiles point at AS 2050 or Part 7.3 of the Housing Provisions. Terracotta, fibre-cement and timber slates and shingles point at AS 4597. Cedar sits in that last bracket, which means the whole deemed-to-satisfy case for your roof rests on one standard plus the manufacturer's evidence of suitability and installation instructions.

Practically, that changes who you need. A building surveyor will ask to see the product evidence and the installation detail rather than waving through a familiar assembly. The battens, the fixing pattern, the underlay and the ventilation behind the shingles are all part of that evidence, and a proposal that treats the shingles as a decorative skin over an ordinary roof build-up has not answered the question.

Queensland shows how the trade side maps onto this. The QBCC's roof tiling licence class expressly covers cutting and fixing roof tiles of concrete, clay, metal or similar material, shingles and shakes, to roof and fascia structures, along with setting out and fixing battens, bedding and pointing, flashing, safety mesh and sarking. So in that state the person who lays a shingle roof is inside a defined licence class, and you can check them on the regulator's register.

Clause H7D4 of NCC Volume Two is short and decisive. The bushfire performance requirement is satisfied for a Class 1 building, or a Class 10a building or deck associated with a Class 1 building, if it is constructed in accordance with AS 3959 or the NASH Standard for Steel Framed Construction in Bushfire Areas. If your address is on designated bushfire prone land, that is the pathway, and the bushfire attack level assessed for the site is what sets how demanding it becomes.

A combustible roof covering is the most exposed element in that assessment. The roof takes the ember load first, embers collect in every junction and lap, and a shingle roof has a great many junctions and laps. As the assessed attack level rises, the constraints on external materials and on gaps tighten, and at the upper levels a timber roof covering stops being a realistic proposition. Get the assessment done before you price anything, not after.

Even where the level is low, the detailing advice the fire services give is the detailing advice that matters. The CFA's guidance for existing homes is to seal gaps using compressed mineral wool insulation, to install non-combustible sarking under the roof on new homes to stop embers, to cover skylights with non-combustible fire screens, and to keep gutters clear of leaves and twigs in the warmer months, especially after windy days. A shingle roof makes every one of those harder rather than easier.

Drying is the whole game. A timber roof that cannot dry from underneath will cup, split and grow moss on the shaded elevations while the north and west faces bleach and check under ultraviolet exposure. Most of the serious failures are not the shingles at all: they are the battens and the cavity, blocked by debris, compressed by an added insulation layer, or never built with a drainage path in the first place.

The second failure mode is the junctions. Ridges, hips, valleys and any penetration are where a shingle roof concentrates its risk, and they are where an installer unfamiliar with the material improvises. Ask to see photographs of completed valleys and penetrations from previous jobs, in Australia, on houses rather than gazebos.

The third is availability. Matching material for a repair some years from now is a real question here in a way it is not in North America. Ask where the product comes from, whether the supplier holds stock, and whether the profile and grade are likely to still exist. Buying a modest quantity of spare material at the same time as the roof is cheap insurance on a niche product.

Because a timber shingle roof is not the ordinary housing assembly, expect the approval conversation to be longer. Changing a roof covering from tile or sheet to shingle changes weight, fixing, ventilation and fire performance, which takes it well past like-for-like maintenance. Your council or a registered building surveyor gives the definitive answer for your address, and on designated bushfire prone land the bushfire attack level assessment is part of that conversation rather than a later formality.

On the trade side, check which licence class your state applies. Queensland's roof tiling class names shingles and shakes explicitly. New South Wales treats roof plumbing, which covers guttering, downpipes, roof flashing and roof coverings, as its own class and requires a contractor licence for residential work above the Home Building Act threshold, and a shingle roof still needs its flashings and rainwater goods done by whoever is licensed for them.

Ask for three documents before you commit: the product evidence of suitability, the manufacturer's installation instructions for the specific product, and the bushfire attack level assessment if the site is bushfire prone. If any of the three does not exist, that is your answer about whether the job is well understood.