- Mon – Sat : 7:00 AM – 6:00 PM
Protect your home from structural water damage and dramatically extend your tile lifespan with professional roof cleaning from A Bligh Exterior Cleaning Ltd. Serving homes and businesses across Portsmouth, our fully certified team utilizes safe, non-destructive scraping and premium soft-wash biocide treatments to completely eradicate heavy moss, lichens, and algae.
We’ll respond within a few hours.
£5m public liability cover for total peace of mind.
Safe, biodegradable methods that protect your property.
IPAF, PASMA & City & Guilds trained professionals.
Turn up on time, every time — that's our promise.
Your roof is your property’s primary shield against the elements, yet it is continuously vulnerable to organic colonisation. In the damp British climate, concrete and clay roof tiles naturally absorb moisture, creating the perfect breeding ground for thick moss, deep-rooted lichens, and black algae. As moss grows, it acts like a giant sponge, trapping rainwater against your tiles and significantly increasing the weight load on your roof timbers. During winter, this trapped water undergoes a destructive freeze-thaw cycle—expanding as it turns to ice, cracking your tiles, rotting your wooden battening, and causing severe internal roof leaks. Furthermore, falling clumps of moss constantly wash down into your gutters, causing frequent, costly blockages.
Allowing moss to spread uncontrolled across your roofline doesn’t just ruin your property’s aesthetics; it sets off an expensive chain reaction of structural decay.
When winter temperatures drop, the moisture trapped within thick roof moss expands as it freezes. This structural expansion breaks down the tile composition, causing them to crack, snap, or shift out of position, exposing your underlying roof felt and timber to immediate water ingress.
Many uncertified contractors use high-pressure jet washers on roofs because it is fast, but this aggressive method permanently ruins the protective sandy finish on concrete tiles, shortening their lifespan and voiding product warranties. Our manual scraping and soft-wash system completely avoids this risk.
As birds peck at your roof moss looking for insects, large clumps fall directly into your gutter channels. During heavy downpours, this debris instantly blocks the downpipes, causing rainwater to overflow back into your fascia boards and seep into your property’s internal walls.
At A Bligh Exterior Cleaning Ltd, our mission is to provide top-tier exterior cleaning services that enhance the beauty and value of properties in Portsmouth. We’re committed to exceptional results with every job — using eco-friendly, safe methods that protect both your property and the environment.
Years of trusted service in Hampshire
When you hire A Bligh, you’re getting more than a clean — you’re getting a team that treats your property like their own.
Born and based in Portsmouth — we know the local properties, weather and challenges inside out.
Pure-water systems for glass, soft-wash for delicate surfaces, and high-pressure for hard stone.
PureSeal approved applicator plus IPAF, PASMA and City & Guilds certifications.
No hidden charges. What we quote is what you pay — every single time.
Have a question about our professional cleaning services? Below, we have compiled answers to the most common queries we receive from homeowners and businesses across Portsmouth.
No, absolutely not. We never use high-pressure jet washing on roofs. High pressure strips away the protective surface glaze of concrete tiles and can force water straight under the laps into your loft space. We strictly use manual scraping tools to remove bulk moss, followed by a low-pressure chemical soft-wash treatment.
Safety is our absolute priority. We navigate your roofline using specialized roof ladders, mobile scaffold towers, or truck-mounted cherry pickers. Our technicians hold full PASMA and IPAF credentials, allowing us to safely access and clean even the tallest or most awkward roof profiles in strict accordance with safety laws.
Our PureSeal biocide treatment goes to work instantly, killing 100% of the underlying organic spores on day one. Over the next few weeks and months, the natural wind and rain will gradually wash away the dead, weather-worn lichen and biological staining, revealing a beautifully clean, original tile finish over time.
No, we take rigorous preventative measures to safeguard your landscaping. Before we begin, we fully isolate or cover vulnerable areas, and we continuously flush all surrounding lawns, flowerbeds, and shrubs with fresh water during the application process to fully dilute our eco-friendly treatments.
Because our soft-wash biocide kills the microscopic root systems deep within the pores of the tiles rather than just removing surface growth, your roof will typically remain entirely free of moss for up to 3 to 5 years, depending on the surrounding tree canopy and sunlight exposure.
