How To Clean A Roof Without Damaging The Tiles?

Cleaning a roof always requires following gentle methods, using the right equipment, maintaining hygiene, and considering the overall cost insights. Let’s admit that meeting all the requirements can be difficult.

So, what’s the easier way? How to clean a roof leaving everything in top condition?

The good news is that different methods such as manual scraping, soft washing, and chemical cleaning offer high cleanliness. Also, you don’t have to worry about damaging the roof tiles as well.

Let’s get into the details.

Why Should You Clean Your Roof?

So, is cleaning a roof necessary? Well, yes. Here’s what happens if you don’t ever clean your roof.

1. Moisture Related Issues

Leaving moss, algae, and dirt on your roof tiles can lead to severe moisture-related problems. Moss, in particular, absorbs moisture, adding weight to the roof and stressing its structure.

The barrier created by moss, dirt, and lichen prevents roof tiles from drying in the sun, causing moisture to penetrate and damage integral parts of the roof, such as timber rafters. This moisture can also result in cracks and splits in the roof tiles, leading to long-term structural damage.

2. Damage to Structural Bonds

Moss, thriving on cement, often grows on the bonds that join ridge tiles, apex tiles, and the roof. This growth can cause significant damage by breaking and agitating these essential bonds, compromising the structural integrity of the entire roof.

3. Overheating and Energy Costs

Accumulated moss, algae, and dirt on roof tiles can lead to an overheating attic and roof space. The coverage acts as insulation, preventing heat from escaping the building and creating uncomfortable indoor conditions. This can result in higher energy bills for ventilation and air conditioning.

4. Blocked Gutters and Drainage Issues

The presence of moss, algae, or dirt on roof tiles can cause blockages in the roofline drainage system. Moss and other materials can accumulate in the guttering, leading to water running down the sides of the building. This causes unsightly marks and can result in dampness within the property walls.

What Are The Ways of Cleaning A Roof?

There are different ways of cleaning a roof in the UK. We will discuss the most common ways here with a step-by-step process. Let’s see how easy we can make it for you!

1. Manual Scraping

Cleaning roof tiles manually is a simple yet effective method. To start, choose a dry day for the cleaning process. Use a trowel or stiff brush to scrape off moss, algae, and dirt from the tiles.

Alternatively, consider using the SkyScraper Roof Moss Remover by SkyVac for a ground-level cleaning option.

2. Pressure Washing (Not Recommended)

Pressure washing is a common method but may cause damage. First, we will share the common steps of pressure washing a roof and then explain how you can reduce the level of damage from the beginning.

Firstly, clear the roof of any loose debris, leaves, or branches. Wet the roof surface to help loosen dirt and moss. Then, start pressure washing from the top of the roof and work downward.

Make sure you maintain a consistent distance to ensure even cleaning. And, don’t forget to pay attention to areas with heavy moss or algae growth. Rinse the roof thoroughly to remove detergent and loosened debris.

Finally, ensure all cleaning agents are washed away.

And, here are the reasons why pressure washing is not recommended and how you can reduce the damage.

Avoid using a high-powered pressure washer, as it can remove the finish of the roof tiles prematurely.  The forceful water stream may flood the roof/loft space through small cracks or gaps in the tiles. Adjust the pressure washer to a low setting to reduce the risk of damage.

Tile manufacturers often discourage pressure washing, as it can void guarantees. If you don’t have enough knowledge about pressure washing a roof, don’t approach it yourself. Consult with roofing experts or manufacturers for specific guidelines.

3. Chemical Cleaning

Chemical roof tile cleaners are effective against moss and algae. To get started, scrape the roof tiles manually before applying chemical cleaners. Use moss killers, fungicides, or anti-moss treatments via a spray.

Ensure proper coverage and avoid runoff into drinking water sources. And, cover nearby plants and grass during chemical application.

4. Soft Washing (Best Way)

Soft washing is a gentle method with precautions. Soft washing involves applying low-pressure specialized outdoor cleaning products. You need to apply softwash chemicals by using extendable water-fed poles to prevent damage. Finally, rinse off the cleaning solution after it has had time to take effect.

This method is mainly suitable for various surfaces, including roof tiles, exteriors, brickwork, fascia, soffit, and cladding.

What’s The Best Way to Clean a Roof and Why?

Soft washing is the most gentle way to clean a roof but it may not work the best for stubborn moss build-ups. Every method comes with individual positive insights and limitations. Here are the details so you can pick the right method that works best for you.

1. Pressure Washing Pros

• Effective in removing dirt, debris, moss, and algae.
• Essential for regular roof maintenance.
• Improves property value and curb appeal.

Since we already shared the drawbacks of pressure washing your roof, next move on to the next methods.

2. Soft Washing Pros

• Safe and effective for various roofing materials.
• Preserves the integrity of tiles with low-pressure application.
• Environmentally friendly with fewer chemicals.

3. Soft Washing Cons

• May not be as effective for stubborn moss build-ups.
• The cleaning process can take longer.

4. Chemical Cleaning Pros

• Cost-effective and efficient solution.
• Removes contaminants without damaging shingles or tiles.
• It enhances curb appeal and increases roof lifespan.

5. Chemical Cleaning Cons

• Potential risks associated with chemical use.
• Requires professional application for optimal results.

6. Manual Scraping Pros

• Simple and quick method.
• Suitable for a DIY approach.
• Immediate results on a dry day.

7. Manual Scraping Cons

• Labor-intensive for large roofs.
• It is less effective than other methods.

Also Read: DIY Gutter Cleaning from the Ground

How to Prevent Build-Ups on Roof Tiles?

Below are some bonus tips for you that will help you prevent the build-up of dirt and moss on your roofs.

• Regularly inspect your roof for dirt, moss, algae, or lichen build-up signs.
• Use appropriate tools like a trowel or stiff brush to manually scrape off moss and dirt.
• Opt for a dry day for cleaning, as moisture can make the removal process more effective.
• Install copper or zinc strips along the roof’s surface to deter moss and lichen growth.
• Prune overhanging branches, trees, or bushes to allow sunlight to reach the roof. Moss thrives in damp conditions, and minimizing shade helps reduce its growth.
• Use specialised stain blockers that offer resistance for up to three years. Apply according to the product’s instructions after roof cleaning.

You’ll surely get the benefits from the points mentioned above. Just maintain consistency, mate!

Frequently Asked Questions

1. How Much Roof Cleaning Costs In The UK?

Roof cleaning costs in the UK vary based on the cleaning method and property size. Moss removal, the more affordable option, averages between £8 to £15 per square meter for pressure washing.

Prices may range from £300 for a terrace house to £600 for a 3/4 Bed Detached property in Gleam Team’s service areas, including Maidstone, Kent, Sittingbourne, Tonbridge, Sevenoaks, and more. Factors such as access and regional differences can influence overall costs.

2. What Chemical is Used for Soft-Washing a Roof?

Soft-washing roofs commonly involve the use of sodium hypochlorite, a chlorine-based compound. This chemical acts as a potent bleaching agent and disinfectant. While professional services often utilize sodium hypochlorite, some homeowners may opt for a DIY approach using diluted household bleach, tri-sodium phosphate, and surfactants.

3. How Often to Clean A Roof?

The frequency of roof cleaning depends on factors like location and surrounding vegetation. Generally, it’s advisable to clean your roof every 2-5 years. Areas with high moss growth may need more frequent cleaning, while drier regions may allow for a longer interval.

Wrapping Up

Now you know everything about how to clean a roof. Regular moss removal, cleaning out gutters, and addressing damp conditions are vital. Professional roof cleaning services, like Gleam Team, offer affordable solutions tailored to your needs. Whether it’s moss inhibition or a complete roof transformation, keeping yo