Roof Cleaning Northampton - Moss Removal by The Roof Moss Cleaners

Northampton gets around 700 mm of rain a year, spread across 150+ rainy days, which is enough moisture for moss to establish on any roof that doesn't dry out quickly. The bigger factor locally is shade: streets with mature tree cover hold damp longer than open, exposed roofs, which is why moss growth varies so much street to street across the town.

Leafier, tree-lined areas such as Kingsthorpe and Abington see the heaviest moss growth in our experience, because overhanging trees keep roofs shaded and slow to dry. More centrally located, exposed areas like Boothville see noticeably less.

It matters for treatment, not for whether we can remove it. Moss forms raised, cushion-like clumps; algae shows as flat black or green streaking, usually on north-facing slopes; lichen is the crusty, often orange or grey patches that bond directly to the tile surface. Biocide treatment kills all three, though lichen - there are over 20,000 species - can take two applications three years apart to fully clear on some roofs.

No. Softwash uses sodium hypochlorite (bleach), which we don't use. We treat with biocide, which is lower toxicity and doesn't produce the fumes bleach does, while still killing moss, algae and lichen effectively.

Roof tile manufacturers in the UK only recommend manual moss removal and biocide treatment - that is the method we use. We hand-scrape moss from the tiles and follow with a biocide application. Our hot wash service uses low-pressure, heated water to lift dirt, algae and lighter lichen without scraping, then finishes with the same biocide treatment. We do not pressure wash or softwash roofs. Which service you need depends on how much moss has built up and your roof's condition, which we assess before quoting.

Handled correctly, no - but this is exactly why older clay tiles cost more to clean than modern concrete or slate: they need more careful, time-consuming manual scraping rather than faster methods, and it's a false economy to have them rushed. Streets like those around Derngate have a lot of this older clay tile stock, and we price and treat it differently to a modern estate roof for that reason.

Routine roof cleaning itself - removing moss and applying biocide - is maintenance, not alteration, and doesn't typically require consent. Northampton has a genuinely high concentration of protected buildings: West Northamptonshire alone has 3,838 listed buildings and 117 conservation areas, and the Northampton Conservation Area itself contains 8 Grade II listed buildings. If your job involves anything beyond cleaning - touching a chimney, flue, or roof-mounted fitting - that can require separate consent, so if your property is listed we'd recommend a quick check with West Northamptonshire Council's conservation team before work, just to be safe.

Roof cleaning in Northampton starts from £995. What changes the price is cleaning method, access requirements, tile type, and roof size - we confirm all of that with a fixed, written quote before any work starts, so there's no surprise on the day.

Older clay tiles are the most time-consuming to clean because they need slower, careful manual scraping to avoid damage - modern clay, concrete tiles, and traditional slate can be cleaned faster and cost less as a result. Roof size and access (ladders vs. tower vs. cherry picker) are the other two big cost drivers.

Yes. Our quoted price includes full waste removal - we're licensed by the Environment Agency to legally transport moss and debris removed from your roof to a licensed disposal site. The only thing not included is cherry picker hire, if your property needs one for access.

3–5 years is typical. Biocide continues working after we leave, inhibiting regrowth for that window - which is why we back the work with a formal guarantee rather than just a one-off clean.

We return, re-scrape the affected area, and re-treat with biocide at no charge. It's a 3-year guarantee on moss removal and treatment.

No single best time - we work year-round. The only disruption is winter weather: ice, snow or high winds can mean rescheduling a booked clean, but we're not seasonal and take bookings throughout the year.

No - we stick to roof cleaning as our specialism rather than general roofing repair. If we find damaged tiles during a clean, we'll flag it, and recommend using Checkatrade or TrustATrader to find a local roofing contractor for the repair itself.

Call 01604 532186 for a fixed-price quote, we'll email a written quote plus a copy of our insurance policy, then agree a date - we arrive between 7:30–8 am on the day. We invoice after completion, payable within 3 working days by bank transfer, which is our only accepted payment method (we don't currently take card or cash).