New tiled roof installation in Perth, Western Australia, must comply with key Australian Standards, the National Construction Code (NCC), and local guidelines to ensure wind resistance, weatherproofing, and durability in WA’s hot, windy climate.
Key National Standards
- AS 2050:2018 – Installation of Roof Tiles
Sets requirements for placement, fixing, sarking, battens, flashing, bedding, pointing, and workmanship for concrete and terracotta tiled roofs in domestic and commercial buildings. - AS 2049 – Roof Tiles
Specifies quality, strength, and compliance for roof tiles used in installations. - National Construction Code (NCC) Volume Two (2022 Edition – Part 7.3 Roof Tiles and Shingles)
- Fixing of tiles and accessories per wind classification (N1–N6).
- Sarking mandatory for pitches less than 18° or exceeding specified rafter/truss lengths (e.g., full sarking below 18°).
- Minimum tile overhang to gutters: 35 mm.
- Anti-ponding boards required for pitches below 20° without adequate overhang.
- Flashing must follow roof line with ≥75 mm upturn to walls and minimum 150 mm width, moulded into tiles where applicable.
Western Australia Guidelines
- WA Guide to Standards and Tolerances 2019
- Tiles must overhang gutters 35–65 mm (less than 35 mm or more than 65 mm is defective).
- Undulations in tiled roof lines ≤20 mm over 4 m.
- No visible irregularities, cracks, or defects from ground level.
- Pointing must be uniform and remain intact for at least 12 months.
- Valleys, flashings, and bedding installed per NCC and manufacturer instructions.
- Leaks due to poor workmanship are considered defective.
Professional installation by licensed Perth roof tilers following manufacturer guidelines ensures compliance with bushfire ratings, wind loads, and long-term performance for concrete or terracotta tiled roofs.