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- The risks of cleaning at height
- Roof Elements that need cleaning
- Procedures and Chemicals
- Frequently Asked Questions
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Roof-level cleaning: Don’t try this at home!
Unfortunately, roof-level cleaning is an occasional necessity if you want to maintain the condition, efficiency and value of your property. The problem is that many homeowners and business managers underestimate the difficulty and danger of high cleaning, resulting in inadvertent roof damage and even injuries or fatalities.
This post highlights the dangers and challenges of high-level cleaning. It discusses the methods, equipment, and products that professional cleaning companies like Cleaners in Europe use to ensure that high-reach cleaning is safe and delivers lasting results.
The risks associated with DIY high-elevation cleaning
Attempting roof cleaning yourself exposes you to risks like falls from heights, a leading cause of injuries in home maintenance. Walking on and using high-pressure washing methods can crack tiles, strip protective coatings, or force water under the tile overlaps, leading to leaks and structural damage to joists. Electrical hazards from live solar panels during cleaning pose risks in wet conditions.
Roof elements that may require cleaning
- Roof coverings like tiles, metal roofing sheets and slates
- Solar panels
- Skylights
- Dormer windows
- Guttering and fascias
Roof-level cleaning tasks like solar panel maintenance, moss removal from tiles, and roof window care involve height, access and technical challenges that make them unsuitable for DIY.
Professional cleaners across Europe use specialised equipment and techniques for safety and effectiveness while avoiding common pitfalls. Leaving these jobs to experts protects your property, extends its lifespan and keeps you from potential harm.
Roof Coverings
Across Europe, a variety of roofing materials are in use, from concrete and clay tiles in Mediterranean and damp Northern European climates to steeply pitched metal roofs in countries that experience heavy snowfall and slate tiles in the UK and France. Professional services like CiE use specialised access and cleaning equipment, safe chemicals, and proven methods to deliver lasting results safely.
Concrete and Clay Tiles
Moss roots into porous clay in damp climates, lifting the edges and causing cracks that turn into leaks. DIY jet washing or scraping the moss is not only bad for your roof, but it also involves standing on it, which is not recommended, due to the likelihood of cracking older tiles and stripping the outer glazing.
How the Pros Do It
The pros tackle clay and concrete tile cleaning in 2 stages. We use low-pressure spraying equipment to apply special biocides and leave them to activate for 24-48 hours. Then we return and give the roof a low-pressure rinse. Unlike scraping or washing without biocides, which needs repeating every 6 months, moss is kept at bay for 3 to 5 years. We also plan cleaning and access requirements to ensure that walking on the roof only happens when necessary.
Metal Roofing Sheets
Metal roofing sheets are often used in areas that have heavy snowfall, for example, in eastern and northern Europe. These roofs are pitched steeply to encourage snow to slip off so that the subframing is not under heavy load for extended periods.
These aspects create a risk for DIY cleaning:
- The steep pitch of the roof
- The increased risk of slipping off in wet or icy conditions
- The thin nature of the roofing sheets, often 0.5mm or less, can lead to damage or surface scratching if walked on incorrectly
How the Pros Do It
In general, metal sheet roofing does not need intense cleaning. Biodegradable softwash detergents, diluted 1:10, suit metal surfaces without stripping or corroding coatings. Roof inserts like windows and solar panels will benefit from snow removal and cleaning. Professionals will avoid walking on a sheet roof whenever possible and prefer ground-based telescopic cleaning. Telescopic rakes remove snow safely while leaving a protective base layer, followed by soft roof window and solar panel washing to leave a gleaming finish.
Solar Panel Cleaning
Dust, bird droppings, and sticky pollen can reduce solar panel output by 20-30%, but cleaning them yourself risks micro-cracks from tapping, etched glass from tap water minerals, and dangerous DC electrical shocks when wet. Manufacturer and installer warranties may be voided if panels are damaged by DIY cleaning.
How the pros do it
Cleaning of solar panels is recommended every 6 months.
Experts use deionised water delivered via telescopic soft brushes or robotic systems during low-light conditions. The result is clean, streak-free surfaces and higher energy production without any electrical hazards. These methods suit panels fitted to any roof type across Europe.
Worker safety is protected through safety ropes and harnesses, helmets and other appropriate equipment.
Gutter, fascia and soffit board cleaning.
Without regular cleaning and maintenance, gutters, fascia boards and soffits can cause much more serious damage to your roof through water ingress.
Gutters channel rainwater away from your roof, while fascia (front-facing boards) and soffits (underside panels) protect roof edges from rot. Neglect can cause leaf and roof debris to block gutters, causing them to overflow, which damages walls and foundations in the long term.
Trying to lean a ladder against your guttering to clean and unblock these areas is extremely dangerous. PVC gutters are slippery and can become brittle, and once a ladder starts to slip, it’s a one-way journey downwards.
- Ladder falls: 60% of roof injuries from unstable access
- Electrical shocks: Wires near gutters + wet metal tools = risk of electrocution
- Health hazards: With inadequate protection, mould spores and bacteria from decaying leaves can cause respiratory issues
How the pros do it
Professional cleaners use ground-reach telescopic tools combined with low-impact cleaning methods. These often provide a reach of up to 15m without the necessity for scaffolding or ladders. Going higher may involve scaffolding or cherry picker-style reach equipment.
The professionals will preserve the integrity of your installation using a soft brush/steam system. Gentle scrubbing and 120°C steam cleaning systems clean these areas without damage.
Gutters are cleaned using telescopic vacuums that suck leaves and debris without requiring ladder access.
Professional high-level cleaning procedures
Specialist Equipment
Professional cleaners rely on advanced tools and equipment designed for working safely at height that go far beyond household ladders and comply with Europe’s strict health and safety standards.
Telescopic poles and water-fed brushes extend to 15m or more, ideal for metal roofs and solar panels; soft bristles prevent scratches while delivering cleaning solutions from the ground.
Mobile Elevating Work Platforms (MEWPs) like cherry pickers, scissor lifts and scaffold towers offer stable platforms with built-in harness points to support cleaning teams safely on any pitch.
Ropes and harnesses worn by the cleaners are attached to secure mounting points to ensure that a slip or fall is prevented before serious harm occurs.
Professional cleaners will often use drones for hard-to-reach inspections to verify cleaning requirements and produce an access and cleaning strategy.
This equipment ensures compliance with Europe’s strict health and safety standards.
Using chemicals appropriately and safely
Chemicals must be handled with care to avoid health issues, environmental harm, or roof damage. Professionals select and apply them expertly.
Biocides target moss and algae roots within 24 to 48 hours. They’re organic and can be left for the rain to rinse them off. When treating moss on the roof, it is important to check for moss caught in gutters soon after.
De-ionised water prevents mineral spots on solar glass, maintaining pH neutrality to avoid etching.
Softwash detergents, diluted 1:10 and biodegradable, suit metal surfaces without corroding coatings.
Eco-friendly cleaning products protect the environment and the health of those working with them
In addition to initial training, cleaners will receive annual refresher training and be issued with job-specific PPE for safety.
Frequently asked questions
CIE is the number one choice for high-elevation commercial cleaning services in Europe and the United Kingdom. Trust us to deliver the ultimate professional and reliable contract cleaning service for your home or business premises
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