Roof washing — Professional roof surface cleaning

Over the years, moss, lichen, dirt and other impurities accumulate on the roof surface. These bind moisture and weaken the protective properties of the roofing material. Moss roots penetrate the micro-pores of roof tiles and cause frost damage, which significantly shortens the roof's lifespan. A clean roof reflects sunlight more effectively, keeping the attic temperature under control even during summer heat.

Professional roof washing is a cost-effective way to extend the roof's lifespan without an expensive roof renovation. A regularly washed roof retains its appearance and protective properties up to 5–10 years longer than a neglected roof. We recommend roof washing every 3–5 years depending on conditions.

We use methods suited to each situation when washing roofs. Soft wash is the most common and safest way to clean a roof. A biodegradable cleaning agent is applied to the roof surface, which kills moss and lichen down to the roots. The cleaning agent is left to work for the necessary time, after which the surface is rinsed with low pressure. This method is excellent for concrete roof tiles, metal roofs and felt roofing.

Pressure washing is used selectively, especially on harder roof surfaces such as concrete roof tiles. Excessive pressure can damage sensitive roofing materials, which is why a professional always assesses the appropriate washing method before starting work. The cleaning agents we use are environmentally friendly and safe for plants and small animals.

Roof washing proceeds systematically. First, we carry out a roof condition assessment, checking the roof surface material, condition and any damage. We then protect the surrounding structures, plants and walkways appropriately. Next, we apply the moss removal agent to the entire roof surface and let it take effect.

After the required contact time, we rinse the roof carefully from the ridge towards the eaves, so that water and loosened dirt flow in the natural direction. Finally, we check the quality of the work and ensure that the roof surface is clean and intact. The entire process typically takes one working day for a standard detached house. If needed, we also clean the gutters at the same time.

The price of roof washing depends on the roof area, slope, material and degree of soiling. A typical detached house roof wash costs 400–900 euros. Larger properties, such as row houses and apartment buildings, are priced separately based on the property. The price is also affected by any additional work, such as gutter cleaning or minor damage repair.

Roof washing is always a more affordable option than replacing the entire roof. A well-maintained roof easily lasts 30–50 years, while a neglected roof may develop leak problems as early as 15–20 years of age. We always offer a free condition inspection and quote before starting work, so you know exactly what you are paying for.

The best time for roof washing is from spring to autumn, when the temperature is at least +5 degrees Celsius. Spring is a popular time, as after winter the accumulation of moss and dirt on the roof is clearly visible. An autumn wash, on the other hand, ensures that the roof is in good condition before the stresses of winter. Avoid roof washing in severe frost or in direct sunshine during a heatwave.

Moss removal agent can also be applied in autumn, allowing it to work over the winter so that the moss comes off naturally in spring. This method is particularly suitable for mildly mossy roofs. We recommend booking roof washing well in advance, as spring and early autumn are the busiest times. Get in touch during the winter to secure a suitable date.