Heavy-Duty Roof Pressure Washing For Brisbane's Concrete Tile Roofs

Our roof pressure washing service covers all concrete tile surfaces including ridge capping, hip tiles, valley tiles, and barge details. We manually clear loose moss and debris before pressure washing to prevent blocking downpipes. The pressure wash itself uses rotary surface cleaners on main roof planes and hand-lancing for detail work around penetrations, flashings, and edges. Gutters are rinsed after the wash to clear any wash runoff. We include a post-clean roof inspection — cracked or broken tiles, failed bedding and pointing on ridge caps, and flashing condition are all documented with photos and reported to you.

This service is designed for one material: concrete roof tiles. That includes flat-profile concrete tiles (Monier, Boral), low-profile and high-profile concrete tiles, and concrete ridge and hip capping. Concrete tiles are the only common Brisbane roof material that can safely handle sustained pressure washing at 2,500–3,000 PSI without surface degradation. We assess tile condition before starting — if tiles are heavily weathered with exposed aggregate or significant erosion, we may recommend soft washing instead to avoid accelerating surface wear. Older concrete tiles (pre-1980s) sometimes have thinner profiles that need a pressure reduction.

After completing our safety setup (harnesses, anchor points, edge protection as required), we start with a manual scrape of heavy moss and lichen from tiles, ridges, and valleys. This prevents large chunks blocking your gutters and downpipes during the wash. We then pressure wash from the ridge down using rotary surface cleaners at 2,500–3,000 PSI on the main roof planes, switching to a hand lance with a 15-degree fan nozzle for ridges, hips, valleys, and areas around penetrations. Water flow is managed to run towards gutters and away from any openings. Final step is a gutter rinse followed by a ground-level rinse of all surrounding areas.

Concrete tile roofs are the most common roof type across Brisbane’s established suburbs, and they cop the worst of our subtropical climate. Moss grows aggressively in the overlapping edges between tiles, lifting them and creating entry points for wind-driven rain. Lichen etches into the concrete surface over time, creating permanent pitting if left unchecked. Brisbane’s summer storms deposit organic debris into valleys and against ridge caps, creating damp pockets where biological growth accelerates rapidly. Regular roof pressure washing — every 3 to 5 years depending on conditions — removes this buildup before it causes structural damage to tiles and allows proper water shedding during heavy rain events.