Roof Cleaning

Roof cleaning is the process of removing moss, dirt, algae, mould, lichen and debris from your roof. In Australia where roof surfaces are constantly exposed to harsh elements like road dust and biological growth a dirty roof can turn into serious issues like roof leaks, ceiling cavity damage and even roof replacements. Regular cleaning is your best preventative measure against water damage, expensive roof inspections and structural concerns.

1. Prevents Long-Term Damage

Organic growth like algae, moss and lichen can trap moisture leading to roof tile degradation and potential water damage. Roof cleaners use advanced methods like Bio-Shield Application or soft washing to remove unwanted growth safely.

2. Extends Roof Lifespan

Whether you have Colorbond roofs, terracotta tiles or steel roofs regular maintenance prevents cracks from forming and reduces the risk of tile movement or unsupervised growth that weakens the roof structure.

3. Boosts Energy Efficiency

A clean and well-maintained roof reflects heat better than a debris-covered roof, lowering indoor temperatures and your power bill. This is especially important for metal roofs and properties with solar panels.

4. Improves Property Value

Roof washing enhances the kerb appeal and aesthetic appeal of your home. Real estate agents often recommend roof cleaning before listing to maximise resale value.

5. Meets Warranty Conditions

Roof repairs and replacements can be expensive. Following proper roof maintenance with regular roof cleaning ensures you meet warranty obligations from roofing manufacturers.

Don’t wait until it’s too late. If you see any of the following your house roof may be overdue for a clean:

• Black mould, black spots or visible algae growths
• Green moss or lichen formations
• Overflowing or blocked roof gutters
• Black spots
• Green growth
• Overflowing gutters

Different roofs need different cleaning methods. The cleaning process must suit the roof material, from terracotta tile roofs to asbestos roof structures. Here’s what the pros use:

1. Soft Washing

Using a pressure sprayer with adjustable settings and a special roof cleaning mixture, this method safely removes unwanted stuff from tiled roofs, clay tile roofs or asphalt shingle roofs.

For:

• Terracotta Roofs
• Concrete Roofs
• Spanish Tiles
• Soft Roof
• Surfaces

2. High-Pressure Washing

For metal roofs and hard exterior surfaces. 4000 psi of water pressure can strip away years of buildup. But this aggressive method is not suitable for fragile tiles.

Best Used On:

• Colorbond Roofs
• Garage Roofs
• Tin Roofs
• Building Roofs

3. Manual Treatment + Bio-Shield Application

Roof cleaners often follow a soft wash with a quick application of mould remover or Bio-Shield solution to prevent future growth. This slows down algae growth from roofs for up to 30–40 minutes of dwell time and protection for 6–8 months or more.

Let’s take a look at how to clean roofs for different materials:

Terracotta Tiles

• Soft wash
• Eco-friendly roof cleaning detergents
• Inspect for cracks before applying water

Concrete Roofs

• Medium pressure
• Prone to stubborn spots and algae growth

Colorbond Roofs

• Soft cleaning with a blend of chemicals
• Don’t damage the outer layer

Metal Roofs

• Pressure wash
• Use clean water to avoid residue buildup

Asphalt Shingle Roofs

• Common in some urban areas
• Soft wash only; no pressure cleaner

How often should you clean your whole roof? Here’s a guide for the Aussie environment:

Thinking of hiring a team or doing it yourself? Here are the pros and cons:

DIY Cleaning

Pros:

• Cheap for light maintenance
• Fast for small roofs like single-story tin roofs

Cons:

• Safety risks on multi-story roofs
• No commercial-grade roof cleaning equipment
• The wrong roof cleaning mixture can harm surfaces or the water supply (e.g. tank water)

Professional Roof Cleaning Services

Pros:

• Technicians trained in Roof Treatment
• Quote in minutes & an accurate quote for a 100 square metre to 250 square metre roof
• Preventative maintenance plans are available
• Some offer 30-month guarantee

Cons:

• The cost of roof cleaning varies by roof complexity (e.g. complex roof with ridge capping)

Australians are choosing biodegradable, non toxic roof cleaning detergents. Avoid harsh chemicals that can run into drinking water systems or water tanks. Look for services using art cleaning equipment designed for application of Bio-Shield or similar products.

Here’s a rough guide to Brisbane Roof Cleaning and other metro areas:

Additional costs may apply for:

• Roof tile repairs
• Roof Painting
• Solar Panel Cleaning
• Gutter cleaning

Want to reduce the need for frequent roof cleans? Follow these roof maintenance tips:

• Prune overhanging trees to minimise leaf litter
• Install gutter guards
• Check your roof after storms
• Address roof repairs quickly
• Inspect for bacterial growth or uncontrolled growth
• Remove debris weekly from the roof space

Roof cleaning jobs are essential for any property’s long term health. A dirty, algae covered roof not only ruins kerb appeal but also invites costly repairs, mould regrowth and water damage. Whether it’s roof tile repairs, pressure roof services or Bio-Shield Application for preventative maintenance, your roof deserves care.

Hire an expert team with experience in Roof Clean Australia projects or ensure your DIY approach uses the right cleaning process. No matter the type of roof—from Elemental tiles to asphalt roof materials—a clean roof saves money and adds value.