Roof pressure cleaning is one of the most effective ways to remove built-up dirt, debris, and algae, helping keep your roof looking like new.
Have you thought about cleaning your roof lately? Your roof works hard to protect your home from the elements — withstanding the sun, rain, wind, and storms, often for years at a time. Regular pressure cleaning is a great way to reduce the effects of weathering, extend the life of your roof, and maintain the overall appearance of your home.
In this article, we’ll share some helpful advice on high-pressure roof cleaning, so you can better understand how to care for your roof. Let’s get into it.
Why Pressure Cleaning is the Smart Choice
In Australia, most homes feature either tiled or metal roofs. For both of these popular roof types, pressure washing is one of the most efficient, effective, and safe methods of cleaning available.
While certain chemical treatments (such as chlorine-based solutions) can sometimes be used to scrub particular types of roofs, these methods are typically much slower and, if your roof isn’t chemical-resistant, potentially damaging.
That’s why roof pressure cleaning remains the preferred option — it’s ideal for removing everything from surface dirt to stubborn algae and organic buildup.
What You’ll Need for Roof Pressure Cleaning
The most important tool you’ll need is a pressure washer. You can either rent or buy one, depending on how often you think you’ll use it. If you’re only planning to clean your roof once or twice, renting is a cost-effective option. However, if you can see yourself also cleaning your driveway, patio, or home exterior, buying a good-quality pressure washer might be a better long-term investment.
Entry-level models usually start from around $350 to $500, while high-end commercial-grade units are available for a higher price.
It’s also essential to understand your roof’s layout before getting started. Walking on roofs can be risky, especially on steeper pitches or wet surfaces. Make a note of any potential hazards like skylights, vents, or particularly steep sections. And always wear shoes with strong grip, as the roof will become quite slippery once wet.
How to Pressure Clean Your Roof
When it comes to pressure washing your roof, the safest and most effective method is to begin at the highest point — the peak — and slowly work your way down. This allows the water to naturally run down and away from you, reducing the chance of slipping.
Aim the nozzle directly down towards the surface to avoid blasting water underneath tiles or overlaps in metal sheeting. Hold the nozzle about 30cm away from the roof surface, using medium pressure. Avoid using high pressure as it can crack tiles, dent metal roofing, or strip protective coatings.
If you come across stubborn grime or algae, move the nozzle slightly closer until the buildup starts to lift — but always stay mindful of the pressure and distance to avoid causing damage.
It’s best to clean your roof in small, manageable sections. This not only ensures a thorough clean but also limits how much slippery surface you’ll be standing on at any one time. If needed, pause and allow areas to dry before moving on to maintain safety while working.
Important Safety Reminders
Cleaning your roof is a valuable maintenance task that can extend its lifespan and improve your home’s appearance. However, it’s no substitute for professional inspections by licensed roofing specialists. Just like regular dental care doesn’t replace trips to the dentist, keeping your roof clean helps in between professional check-ups.
Always be careful and take your time. If you feel that cleaning your roof may be too risky, or if your roof is too steep or high to safely access, it’s always wise to call in a professional.
Need Expert Roof Cleaning?
If you’d prefer to leave it to the professionals, Wash Rite’s experienced exterior cleaning specialists are ready to help. We provide professional roof cleaning services using the latest equipment and safe, effective techniques.
Our team can safely handle everything from grime removal to stubborn algae and lichen buildup — restoring your roof to its best condition while protecting its structure and finish.
Contact Wash Rite today for a free quote and professional advice.
