Key Takeaways
- Spray and wait kills moss, lichen, and algae without damaging tiles
- Unlike pressure cleaning, it doesn't remove protective tile coatings
- Results visible within 2-8 weeks as rain washes away dead growth
- Perfect for terracotta, slate, and older concrete tiles
- Protection lasts up to 12 months, preventing regrowth
Is your roof covered in unsightly moss, lichen, or algae? You might think high-pressure cleaning is the answer—but for many Sydney roofs, it can actually cause more harm than good.
Spray and wait roof cleaning offers a gentler alternative. Developed right here at RoofingCorp, our spray and wait program removes organic growth safely, without the risks of pressure damage to your tiles.
How Spray & Wait Works
The spray and wait process is simple but effective:
- Application — Our biodegradable treatment is evenly applied across your entire roof using professional spray equipment.
- Penetration — The solution penetrates moss, lichen, algae, and mould, killing organisms at the root level.
- Natural Removal — Over the following weeks, rain gradually washes away the dead growth, revealing a clean roof.
- Ongoing Protection — The treatment continues protecting your roof for up to 12 months, preventing regrowth.
Spray & Wait vs Pressure Cleaning
How do these two cleaning methods compare?
Spray & Wait Benefits
- No risk of tile damage
- Kills growth at the root
- Safe for all tile types
- Eco-friendly formula
- Long-lasting protection
- No water waste
Pressure Cleaning Considerations
- Can crack delicate tiles
- May remove protective coatings
- Not suitable for old roofs
- High water usage
- Immediate visual results
- Growth can return quickly
Which should you choose? For delicate tiles (terracotta, slate, older concrete), we recommend spray and wait. For heavily soiled concrete tiles or metal roofs in good condition, pressure cleaning may give faster results. We assess each roof and recommend the best approach.
Who Should Use Spray & Wait?
Spray and wait is ideal for:
- Terracotta Tile Roofs — Protects glazed and unglazed terracotta from pressure damage
- Older Concrete Tiles — Prevents cracking and coating removal on weathered tiles
- Slate Roofs — Safe for fragile slate that can't handle high pressure
- Eco-Conscious Homeowners — Biodegradable formula with minimal environmental impact
Not Recommended For
Roofs already due for painting or coating may benefit more from full restoration with pressure cleaning, as the surface needs preparation anyway.
Frequently Asked Questions
What is spray and wait roof cleaning?
Spray and wait is a gentle, no-pressure roof cleaning method. A biodegradable solution is applied to your roof, which kills moss, lichen, algae, and mould at the root. Over the following weeks, rain naturally washes away the dead growth.
How long does spray and wait take to work?
You'll typically see results within 2-8 weeks depending on weather conditions. More rain speeds up the process. The treatment works best in autumn and spring when there's regular rainfall.
Is spray and wait better than pressure cleaning?
For delicate tiles (terracotta, slate, older concrete), spray and wait is definitely better—pressure cleaning can crack tiles and remove protective coatings. For heavily soiled concrete tiles or metal roofs in good condition, pressure cleaning gives faster results.
Is the spray and wait solution safe?
Yes, our spray and wait formula is biodegradable and eco-friendly. It breaks down naturally and won't harm your garden, pets, or the environment.
How long does the protection last?
Our spray and wait treatment provides protection for up to 12 months, significantly slowing regrowth. For best results in areas with heavy tree cover or high humidity, we recommend annual treatment.
Can spray and wait be used on all roof types?
Spray and wait is ideal for terracotta tiles, concrete tiles, slate, and Colorbond. It's especially recommended for older or fragile tiles where pressure cleaning could cause damage.
The Smart Choice for Delicate Roofs
Spray and wait roof cleaning is the intelligent choice for homeowners who want a clean roof without risking tile damage. It's gentle, effective, and provides long-lasting protection against regrowth.
At RoofingCorp, we've developed our spray and wait formula specifically for Sydney's climate and common roof types. Combined with our expertise in all cleaning methods, we'll ensure your roof gets exactly the treatment it needs.
View our roof cleaning services or contact us for a free assessment and quote.
RoofingCorp
Verified ExpertExpert Roofing Team
Our expert roofing team has over 30 years of experience providing professional roofing services across Sydney. With extensive knowledge of all roofing systems and local building regulations, we're committed to delivering quality, compliant, and long-lasting roofing solutions.
