Roof cleaning is an important task but often a confusing one. With several methods available, choosing the right one for your home can be daunting. In this article, we’ll explore the three primary roof cleaning techniques—water blasting, soft washing, and roof treatment—detailing their pros and cons to help you make an informed decision.
Water Blasting to Clean Your Roof
Water blasting, also known as pressure washing, uses high-pressure water jets to clean surfaces. While it’s a popular method for cleaning driveways and patios, its application on roofs is more contentious.
Pros:
- Fast Results: Water blasting delivers immediate and visible results.
- Minimal Equipment: Only a pressure washer and a water source are required.
Cons:
- Potential Damage: High-pressure water can force its way into places it shouldn’t go, causing water ingress that might lead to structural issues. It can also strip paint and damage roof surfaces, especially if they are weak or aged.
When Should You Water Blast a Roof? Water blasting is suitable in specific situations:
- Selling the Property: If you need your roof to look pristine quickly to enhance curb appeal.
Preparing to Paint: Before painting, a thorough cleaning is essential. After a 4000psi water blast, apply a sodium hypochlorite (bleach) treatment to remove all loose materials and microscopic mould particles, providing a clean surface for the new paint to adhere to.
Soft Washing to Clean Your Roof
Soft washing uses a low-pressure spray along with specialised solutions to clean roofs. It’s a gentler alternative to water blasting, focusing on killing mould, mildew, and algae rather than simply blasting them away.
Pros:
- Optimal Cleaning: Soft washing is the best method for maintaining roof integrity and adhering to most roof warranty conditions.
- Prevents Damage: It avoids the risks associated with high-pressure water, preserving the roof’s surface.
Cons:
- Regular Maintenance: Soft washing should be done every 1 to 2 years to be effective. If mould and lichen build up too much, the soft wash might not be effective.
- Special Equipment and Chemicals: Requires specific tools and cleaning agents, which might mean higher costs and complexity compared to water blasting.
When Should You Softwash a Roof? Soft washing is ideal for routine maintenance. It’s the preferred method for most homeowners due to its effectiveness and gentle approach. Regular soft washing prevents the need for more aggressive cleaning methods. However, if a roof is heavily infested with mould and lichen, it might necessitate water blasting or stronger chemical treatments.
Roof Treatment to Clean Your Roof
Roof treatment involves applying chemicals, typically herbicides, to eliminate and prevent mould, algae, and lichen growth. This method doesn’t require direct cleaning; the chemicals work overtime to cleanse the roof.
Pros:
- Cost-Effective: Generally cheaper than water blasting.
- Long-Lasting: Can keep the roof clean for up to three years under the right conditions.
- Convenient: Often applied from the ground, making it ideal for hard-to-reach roofs.
Cons:
- Chemical Risks: The herbicides used are aggressive and can damage plant life if overspray occurs. They can also contaminate tank water, posing a health risk.
- Environmental Impact: These chemicals are known carcinogens and can accelerate the oxidation of roof surfaces, making them appear chalky.
- Weather Dependency: The treatment needs time to work and should not be applied when rain is imminent or if dew is likely to form soon after application.
When Should You Apply a Roof Treatment? Roof treatment is a good choice if:
- Accessibility Issues: If your roof is hard to access or has brittle tiles that can’t be walked on.
- Budget Constraints: It’s a more affordable option if cost is a major consideration.
No Urgent Need: If you don’t require an immediate cleaning and can wait for the chemicals to take effect over time.
Choosing the right roof cleaning method depends on your specific needs and circumstances. Water blasting offers quick results but comes with damage risks. Soft washing is best for regular maintenance and long-term roof health, though it requires consistent upkeep. Roof treatment provides a cost-effective and convenient option but involves significant chemical risks and environmental considerations.
Understanding the pros and cons of each method will help you make the best decision for maintaining your roof, ensuring it remains in top condition and extending its lifespan. Whether you opt for water blasting, soft washing, or treatment, each has its benefits depending on your roofing materials and specific needs. In Auckland, using Elephant House Wash’s professional cleaning ensures that your roof washing is done safely and effectively. Regular cleaning services can prevent moss growth and keep your tile roof in top condition. Proper tile roof maintenance not only extends the lifespan of your roof but also enhances your home’s curb appeal. Trusting professionals with your roof cleaning ensures a thorough job and peace of mind.
