We clean roofs across Bristol and the surrounding areas, removing moss, algae and lichen using a method suited to the type and condition of each roof, for an effective clean without damaging the surface.
Moss, algae and lichen can gradually build up on your roof, along with dirt and other organic deposits. As well as affecting how your roof looks, these build-ups can become a maintenance issue over time.
If left to develop, they can keep roof tiles damp for longer periods, while repeated freeze-thaw cycles can place additional stress on the roof surface. Over time, loose debris can also make its way into the gutters, where it may prevent rainwater from draining away properly.
Our roof cleaning service removes built-up dirt and organic growth, leaving your roof looking clean and well maintained. In many cases, our soft washing system allows us to clean the roof effectively from ground level, reducing the need for direct access onto the roof surface.
In short, professional cleaning can provide important benefits for your roof:
Before we begin, we check the condition of the roof, the level of build-up and the available access. This allows us to determine the right method for the job, rather than applying the same approach to every roof.
1
Roof assessment and preparation
We check the surface, the areas with heavier build-up and the access conditions, then prepare the surrounding area for the work.
2
Removing heavier build-up
Where necessary, thick moss build-up and loose material are removed first so the surface can be cleaned properly.
3
We clean the roof
We use the right method for the surface and level of contamination to remove dirt and remaining build-up, rather than treating every roof in the same way.
4
Post-cleaning inspection
Once the roof is clean, we carry out a visual inspection to identify any issues that may previously have been hidden by the build-up.
5
Final clean-up
All material produced during the work is collected and the surrounding area is left clean.
After cleaning, the roof may benefit from an additional treatment or sealer, depending on the surface and the service chosen. Application only takes place once the roof has been properly prepared and is sufficiently dry, so the product can be applied evenly.
1
Drying the roof
Before application, we check that the surface is sufficiently dry and ready for treatment.
2
Protecting the surrounding areas
We cover any elements and surfaces that should not come into contact with the product being applied.
3
Final surface preparation
Any remaining loose debris is removed and the roof is checked again before application.
4
Applying the treatment or sealer
The product is applied evenly across the roof surface using the appropriate method for the product and the roof itself.
5
Additional coat, if required
If the system requires two coats, the first is allowed to dry before the second is applied.
6
Final inspection and clean-up
Protective materials are removed, the work is checked and the property is left clean.
A look at some of the roofs we’ve worked on across Bristol and nearby areas.
Garage roof covered with moss: fully cleaned
Roof covered with lichen and dirt: thoroughly cleaned
Moss and lichen build-up on the roof: completely removed
Roof with darkened tiles: cleaned and restored to its original colour
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Years of experience
A few clear advantages
When choosing a company to clean your roof, experience, safety and the way the work is carried out all matter. That’s why at Bristol Blast Away we focus on a few clear advantages:
Experienced roof cleaning specialists
With over 11 years of experience and more than 250 roofs cleaned every year in Bristol, we’re a team you can rely on to clean your roof.
Cleaning
Whether your roof only needs moss removal or a more thorough clean, we recommend the right service based on its condition and the level of build-up. The aim is to remove existing deposits and restore a clean, well-maintained appearance without unnecessary work.
Sealing
After cleaning, where suitable, we can apply a sealer to provide the surface with an additional layer of protection. This helps the roof stay cleaner for longer and provides extra protection against the weather and the return of organic growth.
Pricing
Roof cleaning prices start from £15/m² and vary depending on the size of the roof, the level of build-up, access and the service chosen. Before any work begins, you’ll receive a free, no-obligation quote, so you’ll know exactly what the service will cost for your roof.
We offer roof cleaning services across Bristol and the surrounding areas. We cover a number of locations across South Gloucestershire, North Somerset and the surrounding areas, including:
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See what our customers say about our roof cleaning service and their experience with Bristol Blast Away.
Roof cleaning in Bristol starts from £15/m², with the final price depending on the size of the roof, the level of moss and other build-up, access, and whether you choose cleaning only or cleaning and sealing.
Yes, in many cases it is. Regular roof cleaning can help remove moss, algae and debris that hold moisture against the roof surface, support proper drainage and reduce the risk of avoidable maintenance issues over time. It also improves the overall appearance of the property and can help keep the roof in better condition for longer.
Professional roof cleaning involves a multi-step process of inspecting the roof, clearing debris, using specialist cleaning techniques and applying protective treatments where appropriate to safely remove moss, algae and lichen.
The safest and most effective method is usually soft washing, which uses low-pressure water together with specialist cleaning solutions to remove moss, algae and grime without damaging tiles, slates or other delicate roof surfaces.
We use the method that best suits the roof. In many cases, soft washing is the preferred option because it cleans at low pressure and reduces the risk of damaging tiles or other delicate surfaces.
Roof cleaning can be safe for most roof types when the method is chosen to suit the material, condition and level of build-up. More delicate surfaces may require lower-pressure cleaning or a gentler treatment, while stronger methods should only be used where appropriate.
Cleaning removes existing moss, but it cannot guarantee that it will never return. Applying a suitable treatment afterwards can help slow regrowth and keep the surface cleaner for longer.
Most roofs benefit from professional cleaning every 2 to 5 years, although there is no fixed schedule for every property.
For most standard homes, cleaning usually takes anywhere from 2 hours to a full day. Larger or more complex properties may take 2 to 3 days or longer, depending on the size, access and level of build-up.
Yes, you can, but it is generally not recommended because of the risks involved. Working at height can be dangerous, and using the wrong cleaning method or equipment can also damage tiles, slates or other surfaces.
Roof Cleaning Services in Bristol
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