Your roof is constantly exposed to rain, wind, dirt, pollution and changing weather conditions. Over time, moss, algae, lichen and other organic growth can build up across roof tiles, affecting the appearance of the property and contributing to debris collecting in gutters and drainage systems. Because the roof is not an area most property owners regularly inspect at close range, this build-up can become significant before it is properly noticed. Regular professional roof cleaning can help control this contamination and keep the roof looking well maintained, but effective roof cleaning is not simply about removing visible dirt. Different roof coverings, levels of contamination and roof conditions require different approaches, which is why the cleaning method should be selected according to the individual property.
Why is regular roof cleaning important?
Roof cleaning can form an important part of ongoing exterior property maintenance, particularly where moss and other organic growth have become established. As well as affecting the appearance of a roof, moss can loosen and fall into gutters, patios and other areas around the property, while algae and lichen can cause increasingly noticeable staining. Keeping on top of this build-up can make the roof easier to maintain and provides an opportunity to assess its visible condition before cleaning begins.
Controls moss, algae and lichen
Moss is one of the most common problems we encounter when cleaning roofs. It can gradually spread across roof tiles, particularly on areas that remain shaded or damp for longer periods, while algae and lichen can cause visible staining and discolouration. Professional cleaning can remove significant moss deposits and address remaining organic contamination using a method appropriate for the roof surface. At Servos Exterior Cleaning, we assess the roof covering, its condition and the extent of the contamination before determining whether careful moss removal, low-pressure softwashing, specialist steam cleaning or another approach is suitable.
Helps keep gutters and drainage clear
Roof moss does not always remain on the roof. As sections become loose, they can fall into gutters and downpipes along with leaves and other debris, potentially contributing to blockages and overflowing gutters during periods of heavy rainfall. This is one reason roof and gutter cleaning are often considered together. Where appropriate, gutters, fascias and soffits can also be cleaned as part of a wider exterior cleaning project, helping to maintain the complete roofline rather than concentrating solely on the roof surface.
Improves the appearance of the property
A roof makes up a substantial proportion of the visible exterior of many properties, so heavy moss growth, dark staining and discolouration can have a noticeable effect on the appearance of the whole building. Removing accumulated organic growth can reveal the original appearance of the roof covering and provide a much cleaner finish. This can be particularly effective when roof cleaning is combined with the cleaning of other exterior surfaces such as render, gutters, fascias, soffits, driveways or patios.
Provides an opportunity to assess the roof
Professional roof cleaning should begin with an assessment rather than automatically applying the same cleaning process to every property. Factors including the type of roof covering, its general condition, access requirements and the extent of contamination all influence the method that should be used. This is particularly important when dealing with older roof coverings and natural materials, where a more considered approach may be required. Roof cleaning does not replace professional roofing repairs or specialist inspections where defects are suspected, but assessing the roof before cleaning helps ensure the chosen method is appropriate for the surface.
What we commonly find when cleaning roofs
From our experience cleaning roofs across North Wales and the North West, moss build-up is one of the most common reasons customers contact us. Some properties develop relatively light patches, while others can become extensively covered over time, particularly on shaded areas that remain damp for longer. Loose moss can also find its way into gutters or fall onto patios, paths and driveways below, which is why we regularly consider the condition of the wider roofline when assessing a cleaning project.
We’ve also found that no two roofs should automatically be treated in exactly the same way. Roof material, age, condition, accessibility and the type of contamination present can all influence the most appropriate cleaning method. This is particularly important with traditional materials such as natural slate, which requires careful consideration before cleaning begins. Our guide to roof cleaning for slate roofs explains some of the additional considerations involved when working with slate roofs.
How should a roof be professionally cleaned?
There is no single roof cleaning method that should automatically be used on every property. A professional approach starts by assessing the roof and determining the type and extent of contamination present. Where significant moss has accumulated, careful removal may be required before further treatment, while low-pressure softwashing can be appropriate for certain surfaces and types of organic growth. Specialist steam cleaning may be considered for other roof coverings and circumstances. The objective is to select an effective method while taking account of the roof material, condition and surrounding property.
This is also why property owners should be cautious about simply applying maximum pressure to a dirty roof. Excessive or inappropriate pressure can be unsuitable for some roof coverings, particularly where tiles or surfaces are older or weathered. We look at this subject in more detail in our guide explaining why you should avoid high-pressure washing for roof cleaning. If you’re considering professional cleaning and want to understand what happens from the initial assessment through to completion, you can also read our guide to the professional roof cleaning process.
Residential and commercial roof cleaning
The principles of selecting the right cleaning method apply to both residential and commercial properties, although the practical requirements of each project can be very different. For homeowners, our residential roof cleaning service covers a range of suitable roof coverings, including natural slate, clay and concrete tiles. Depending on the property and work required, roof cleaning can also be combined with gutter, fascia and soffit cleaning to provide a more complete clean of the property’s roofline.
Commercial projects can involve larger roof areas, different materials, more complex access requirements and the need to work around employees, customers or normal site operations. Our commercial roof cleaning service is available for businesses, property managers and organisations requiring one-off cleaning or planned maintenance. In either situation, the starting point should be an assessment of the property rather than assuming that the same equipment and cleaning process will be suitable for every roof.
How often should a roof be cleaned?
There is no fixed roof cleaning schedule that is suitable for every property. The rate at which moss, algae, lichen and other contamination develop can vary considerably depending on the roof material, surrounding environment, exposure to sunlight, nearby trees, shade and local conditions. A roof that remains damp and shaded for significant periods may experience organic growth differently from one that is more exposed to sunlight and airflow.
Rather than arranging roof cleaning simply because a particular number of years has passed, it is more useful to monitor the condition of the roof. Significant moss growth, visible algae or lichen, increasing staining and larger amounts of moss collecting in gutters can all indicate that it may be worth having the roof assessed. After cleaning, the rate of regrowth will again depend on the individual property and its surroundings, so occasional visual checks from ground level can help identify when organic growth is beginning to become established again.
Can you clean a roof yourself?
Roof cleaning can involve working at height, specialist access equipment, cleaning products and surfaces that may become wet or slippery during the process. There is also the possibility of using a cleaning method that is inappropriate for the roof covering, particularly if the material and its condition have not been properly assessed beforehand. For substantial roof cleaning projects, using an experienced professional helps ensure that access, equipment and the cleaning method are considered together.
Servos has over 10 years of exterior cleaning experience working on residential and commercial properties. Our team is fully insured and professionally trained, and we assess each roof before deciding how the work should be approached. This means the process can be adapted to the roof rather than treating every property in exactly the same way.
When should you consider having your roof cleaned?
It may be time to consider professional roof cleaning if moss is becoming widespread, tiles are heavily affected by algae or lichen, staining is becoming increasingly noticeable or roof debris is regularly collecting in gutters and around the property. The appropriate solution will depend on what is causing the problem, the roof material and its overall condition. In some cases, careful moss removal and an appropriate treatment may be suitable, while other roofs may require a different specialist cleaning approach.
If you’re unsure whether your roof needs cleaning, having it assessed is preferable to selecting a cleaning method based purely on its appearance. Servos Exterior Cleaning can assess the property, discuss the contamination present and recommend an appropriate approach based on the roof and the work required.
Contact Servos about roof cleaning
If your roof is affected by moss, algae, lichen or staining, contact Servos Exterior Cleaning for a free, no-obligation quote. Our experienced team provides professional roof cleaning for homes and businesses across North Wales and the North West. Call 01745 289055 or email hello@servosuk.co.uk to discuss your property with our team.
Roof cleaning areas we cover
Servos provides professional roof cleaning for homes and businesses across North Wales and the North West. Our roof cleaning services are available throughout North Wales, Bangor, Chester, Wirral, Liverpool, Warrington, Northwich, Crewe, Macclesfield, Altrincham, Sale, Stockport and Bury, as well as surrounding areas.
