Professional removal of algae and moss from buildings and surfaces to restore appearance and reduce slip, damage, and long-term maintenance issues.
• Improves safety by reducing slippery surfaces on walkways, entrances, and public areas
• Restores the appearance of buildings, façades, and outdoor spaces
• Helps prevent long-term damage to roofs, walls, and hard surfaces
• Extends the lifespan of exterior materials by removing growth that traps moisture
• Provides a controlled solution suitable for occupied and public-facing sites
UK-Based Specialists in Algae & Moss Removal
APT ICC delivers algae and moss removal services across England and Wales for commercial and industrial clients, including councils, schools, retail businesses, and property managers. With more than 35 years of experience, we take an assessment-led approach to ensure each surface is treated safely, effectively, and in a way that suits the building and its surroundings.
Algae and moss removal involves safely cleaning biological growth from external surfaces where moisture and shade allow it to develop. This type of growth is commonly seen on roofs, walls, render, brickwork, stone, pathways, floors, and gutters. Left untreated, algae and moss can make surfaces slippery, hold moisture against materials, and cause staining or gradual deterioration.
This service is sometimes referred to as exterior biological cleaning, moss treatment, or algae treatment. In simple terms, these all mean removing unwanted organic growth and preventing it from returning too quickly. Depending on the surface and location, the work may involve environmentally responsible chemical treatments, steam cleaning, or controlled jet washing. The chosen method is always based on the condition of the surface, its age, and how the area is used.
APT ICC works on all types of buildings, from retail units and commercial premises to public spaces and infrastructure. We regularly operate at all heights and in live environments where members of the public, staff, or pupils are present. Careful planning allows us to manage water control, access, and safety, particularly in busy or sensitive locations.
Our experience includes projects such as the Pond House in Gloucester, the White Rose Bridge clean, and exterior cleaning works for Poundland in Merthyr. These sites required a balanced approach that delivered visible improvement without causing disruption or damage to surrounding areas.
By choosing APT ICC, clients benefit from a specialist contractor that understands both the practical and safety considerations of algae and moss removal. Our controlled methods, long standing experience, and focus on suitability ensure exterior surfaces are cleaned effectively while protecting the building, its users, and the wider environment.
“I would like to express my sincere thanks to APT for the excellent job they carried out at Tai Bach. The project was a much needed one and now that it is completed it has really helped to improve the look of the town. We have received many good comments from the public which is always a good sign.”
Kevin Hiller - Property Surveyor, Neath & Port Talbot Council
“We employed the services of APT to renovate a Grade 2 Listed Building. Under the directive of Cadw we were not allowed to use any wet process or chemicals within the interior of the building. APT used Soda Blasting on sandstone, brick, ceramic glazed tiles, metal work, paintwork on ceilings, coving, woodwork and ornate fixtures.
It was a great achievement to have one system for all the surfaces that needed cleaning and restoring and one that also ticked all the boxes of the environmental and conservation officers. The process saved us both time & money in being able to have just one company on site. We are very grateful to APT for their hard work on this project.”
Tim Luke - Gee Construction
“I would like to thank APT-ICC for their excellent work and assistance on the Barclays Bank project. They delivered the scheme and additional works on time and without issue thanks to Andrew and his team for all your extra effort, long hours and commitment. I look forward to using them on future renovations.”
Graham Lowe - Project Manager, Overbury Plc
“We have been receiving an overwhelming number of positive comments about the war memorial cleaning. Yesterday, during the small ceremony at the Penrallt column on the 1st World War anniversary, many expressed their appreciation for how splendid the memorial looks after the cleaning. We anticipate sharing photos on the internet page later this week. Additionally, we have shared your details with another person who serves as the clerk to two other local councils. Thank you once again for the exceptional work.”
Janice Davies - Gwynedd Council
Algae and moss grow where there is moisture, shade, and limited airflow. Even after cleaning, spores can remain and regrow over time. Professional treatment helps slow regrowth and keeps surfaces safer for longer.
Small areas can sometimes be cleaned in-house if access is safe. However, larger areas, roofs, or public-facing spaces increase the risk of slips, damage, or injury. Specialist removal is often safer and more consistent.
No, it’s also a safety and maintenance issue. Growth can make walkways slippery and trap moisture against surfaces, leading to long-term damage. Removing it reduces risk and helps protect the structure.
Common surfaces include roofs, walls, render, brickwork, stone, paths, and hard standing areas. Each surface needs a different approach to avoid damage. The method used depends on condition, age, and how the area is used.
Yes, when planned correctly. Work is often carried out in live environments with controls in place to manage water, access, and safety. This is common on commercial sites across England and Wales.
It can if used incorrectly. That’s why pressure is only used where suitable, and alternative methods are chosen for more delicate surfaces. Assessment before cleaning is key to avoiding damage.
Yes, advice can be given on suitable professional treatments and chemicals to manage growth. In some cases, guidance is enough; in others, full removal is the safer option.
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