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Roof Cleaning · Berkshire

Roof Cleaningin Windsor

Windsor's older streets are full of roofs with more going on than two plain slopes: bays, rear additions, chimneys and lead-lined junctions. We clean them from the top down, with care at every detail, and finish with Chiltern EverGuard™.

  • Worked from the top down
  • Care around lead and ridges
  • Moss cleared from gutters
Operative on an aluminium access tower guiding a rotary surface cleaner across profiled roof tiles beside a flue

The approach

Detailed roofs need a planned order so clean work stays clean

Where a roof steps down over a bay, a back addition and a porch, moss loosened from the top lands on the roofs below. Cleaning in the wrong order means doing parts twice or leaving debris on a finished slope. We plan the sequence at the site visit, working from the highest roof to the lowest, and agree where the loosened material will be collected.

St. Georges Chapel, Windsor Castle

Windsor roofs

Castle town, railway suburbs and the Thames

The town grew outward from the Castle over many centuries, and the railways brought a further surge of building in the nineteenth century. Clewer, one of the oldest settlements in the area, was gradually drawn in as Windsor spread. The result is a dense mix of period terraces, older brick houses, established suburban streets and newer housing, often within a short walk of one another.

Many of the older homes have the busy rooflines typical of their era: slate or clay over the main house, small hipped roofs over bay windows, lean-to roofs on rear additions and tall chimney stacks with leadwork around them. The Thames, the parks and plenty of mature garden trees keep some of those slopes shaded and slow to dry, which is where moss gathers first.

Sequence

Working from the highest roof to the lowest

On a roofline with several levels, the order of work matters as much as the method. We start at the ridge of the main roof and work downwards, so moss lifted from above falls onto roofs that have not yet been cleaned rather than ones that have. Lower roofs such as porches, bays and rear additions are then cleaned in turn, often with a gentler finish because their coverings and pitches differ.

Loosened material is collected as we go rather than left sitting on shallow or flat roofs, where it would hold water and start the problem again.

Ridges and hips

Moss along ridges, hips and old mortar lines

Ridges and hips are where wind, shade and mortar meet, and moss often settles in a line along them, making the whole roof look heavier. On older roofs the ridge tiles may still be bedded in mortar that has weathered with age. Moss is lifted from these lines by hand and the area cleaned gently, because force aimed at tired mortar can loosen it.

If a bedding joint is already cracked or a ridge tile is loose, we point it out rather than clean over it. Repointing and rebedding are work for a roofer.

Leadwork

Flashings are not tiles and are not cleaned like them

Lead flashings around chimneys, abutments, dormers and valleys keep water out at the weakest points of a roof. They are softer than tile, they are dressed to shape and their laps must stay undisturbed. We work around them with a light hand, removing the moss and debris that sits against them without directing water or pressure into the joints.

  • Chimney stacks: moss cleared from the back gutter and the base
  • Abutments: growth removed along the wall line without lifting the lead
  • Valleys: leaf and moss debris taken out by hand
  • Any split or lifted lead reported, not patched

Aftercare

Chiltern EverGuard™ Treatment to slow regrowth

With the roof clean, it is back in the same shade and damp that let moss settle there in the first place. That is why we apply the Chiltern EverGuard™ Treatment to every roof we clean. It reaches spores and remnants of growth in the surface that cleaning can miss and helps reduce how quickly they return.

Expect protection of typically between 12 and 24 months, depending on how sheltered and damp each slope is. It is applied in settled, frost-free weather, and we contact you by email to offer a free reassessment as that period ends.

Our process

Five stages from first look to final walk-round

The stages are the same for every roof we clean. On a detailed roofline, the planning in the first two matters most.

  1. 01

    Site visit and drone view

    We look at each roof level from the ground and, where appropriate, by drone, showing you the live footage. Leadwork, ridges, chimneys and room for an access tower are all noted.

  2. 02

    Plan, report and quotation

    Our report sets out the order of work, the method for each covering and the reasoning, together with a defined statement of works and a clear quotation.

  3. 03

    Moss lifted from the top down

    From towers and platforms beside the roof, never standing on it, operatives take the bulk of the moss off by hand, starting at the main ridge and working towards the eaves.

  4. 04

    Low-pressure clean and treatment

    Each roof is cleaned at the lowest pressure its covering needs, or soft washed, with extra care at flashings. The Chiltern EverGuard™ Treatment is applied once the weather is settled.

  5. 05

    Gutters cleared, then handover

    Moss and debris that came down are cleared from every gutter run, downpipes are checked, and the project lead explains the work, the treatment and the aftercare.

Before you book

Clean is not the same as renewed

Cleaning makes a real difference to a roof that has been green for a long time, but it does not reverse the age of the materials. Weathering on old concrete tiles, colour variation in clay and the marks of earlier repairs may all remain, and a few may become easier to see.

Roofing defects such as split lead, cracked tiles or loose ridges are separate from the clean, and we will tell you where we see them.

More about roof cleaning

Proof of work

Recent projects near Windsor

View all projects
  • Block paved driveway in Maidenhead before cleaning, overgrown with grass and weeds
    Close-up of the finished herringbone block paving in Maidenhead

    Block Paved Driveway Cleaning in Maidenhead

    An overgrown block paved driveway in Maidenhead, cleared by hand, deep cleaned, treated with Chiltern EverGuard™, re-sanded with polymeric sand and compacted.

Why choose us

What sets our roof work apart

  • A planned order of work

    Multi-level roofs are cleaned from the top down so debris never lands on a finished section, and every roof level is left clear.

  • Respect for lead and mortar

    Flashings, ridges and old bedding are worked around with a light hand, and defects are reported to you rather than disguised or patched.

  • Off the roof, close to it

    Operatives use access towers, platforms and poles to get near the tiles without standing on them, which protects the covering and improves precision.

  • Fully insured, clearly briefed

    Fully insured operatives, a what-to-expect briefing before the work and a full handover from the project lead at the end.

Nearby

Neighbouring areas we cover

We also clean roofs in Clewer and Dedworth on the west side of town, in Old Windsor and Datchet along the river, and across the bridge in Eton and Eton Wick. The housing changes from street to street, so each roof is seen in person.

Roof Cleaning in nearby towns

What Clients Say

Trusted by homeowners across Buckinghamshire, Berkshire, and Oxfordshire.

Thank you to every client who has trusted us with their home. Your reviews mean a great deal to us. We’re proud to be fully insured, certified professionals — delivering proven results with a customer-focused approach on every single project.

5-Star Rated On Google

  • “Highly please with the result of the roof clean”
    RDRobert Daly
  • “My roof had been an issue for years with the build up of moss.”
    NNicola
  • “Jon did a wonderful job cleaning and treating our roof which had been in a terrible state. He was meticulous and professional throughout, we absolutely cannot fault the service. Would highly recommend.”
    LSLouise Scully
  • “Excellent and professional work from start to finish. Both our patio and roof now look fantastic. Highly recommended!”
    JPJames Phillips
  • “Jon and his team recently cleared all of our very mossy roofing tiles.”
    CColin
  • “Highly knowledgeable and kept us informed throughout the whole process.”
    DWDean WilliamsonMarlow
  • “Jon was very professional and knew exactly what was required.”
    DRDavid ReynoldsMarlow
  • “Incredibly, Jon managed to get it gleaming again. I'm thrilled with the results.”
    AWAnna WilliamsonMarlow
  • “They did a great job cleaning my patio & front driveway in Marlow, very attentive to detail & prompt.”
    TMTom McGrath
  • “I couldn't be happier with the service from Jon, this Marlow Company provided.”
    TDTina Devereux
  • “Jon Did a fantastic job of the driveway and walls.”
    TATim Anders
  • “I cannot recommend Chiltern surface co highly enough!”
    TGThe Gentry Marlow
  • “John spent a few hours cleaning and jet washing my drive, wow an amazing job.”
    SSStuart Singer
  • “Highly recommended! The quality of the work was excellent from start to finish.”
    SMSara Maio
  • “Absolutely brilliant! Jon was absolutely fantastic in communication.”
    RURuby Uppal
  • “I recently had the chiltern surface co team round to my house in Marlow to clean our patio and driveway.. Really happy with the results! The driveway and back patio are looking brand new. Definitely recommended!”
    RKrobbie kneen
  • “Fantasitc company, fantastic job, couldn't recommend more.”
    RHRichard Hobbs
  • “Chiltern Surface Co. were amazing. The men worked really hard in extreme heat and were very respectful of our property”
    ODOlwyn Davison-Oakley
  • “Absolutely brilliant service received from this company.”
    NCNigel Crow
  • “Highly recommend Jon and the Chiltern Surface Co team. They did a fantastic job cleaning, treating and re-sanding.”
    NPNicola Padbury
  • “A huge thank you to Jon and the team at Chiltern Surface Company for the outstanding job they've done.”
    NMNick Marr
  • “Chiltern Surface Co. did an outstanding job cleaning our patio.”
    NCNeylan Cankurtaran
  • “Jon and his team were professional, tidy and did a great job. We had the gutter cleaning service”
    KCKate CT
  • “An excellent service from start to finish. The patio was in quite a state and now it looks as good as new.”
    JSJulie Simpson
  • “I didn't realise just how dirty my patios and driveway had become over the last 4 years.”
    JHJohn Holmes
  • “Solid work on our guttering and cleaning patio stones. Jon and his team worked hard during the day with some really good results to show.”
    GGordon
  • “I couldn't be happier with the patio cleaning service. Years of dirt and stains were completely removed.”
    GSGill Slater
  • “I recently had my 110m² block paved driveway at my home in Maidenhead professionally cleaned, re-sanded and sealed.”
    FCFrancesco Carco
  • “Top notch service. Turned up on time, quick, efficient and my drive has never been so clean! Will definitely use Jon again.”
    DHDaniel Harrison
  • “Jon and the team at Chiltern Surface Co were professionalism exemplified.”
    CWConnor Walton
  • “We used Chiltern for patio cleaning and we were very impressed! Our patio which was looking extremely sorry for itself is like new! I would definitely recommend. The team were very friendly and efficient.”
    CLClaire Lee
  • “Incredible job thank you! My patio had become badly stained from over-cleaning and really needed resealing.”
    BBookTravelBetter
  • “Meticulous, professional, paid attention to detail - our driveway and patios look brand new.”
    LHLinda HopkinsonMarlow
  • “Professional, knowledgeable and friendly. Highly recommend.”
    DODavid OsborneMarlow
  • “It's rare to find someone who is both highly skilled and genuinely nice to deal with.”
    TWThe Williamson TravelsMarlow

Questions

Roof Cleaning in Windsor: your questions

Can you clean a roof with bays, porches and a rear addition?

Yes, where access is safe. Each roof level is planned into the order of work, cleaned from the top down and cleared of debris, so a finished lower roof is not covered again by moss from above.

Will cleaning damage the lead flashing on my roof?

No, not when it is handled properly. Lead is worked around with a light touch, without water or pressure forced into its laps. If a flashing is already split or lifting, we show you rather than clean over it.

Why does moss grow along the ridge of my roof?

Ridges and hips catch wind-blown spores, and the shaded side of a ridge line stays damp. On older roofs, weathered mortar gives moss an easy foothold, so a line of growth along the top is very common.

Can a period slate roof be cleaned?

Yes, in most cases. Slates and their fixings are checked at the site visit. Where they are sound, they are cleaned with close control and low pressure; where a roof is too fragile, we say so before anything is agreed.

Do you walk on the roof?

No. We work from access towers, platforms and poles, as close to the surface as practical without standing on it. That keeps weight off the covering and gives better control around ridges and leadwork.

How long does Chiltern EverGuard™ last on a shaded roof?

Protection typically lasts between 12 and 24 months, and a roof under mature trees or in deep shade is likely to be towards the shorter end. As that period draws to a close we email to offer a free reassessment.

Do you clear the gutters when the roof is done?

Yes, as standard. The moss we take off ends up at the eaves, so every gutter run below the work is cleared and the downpipes checked before we leave.

More from us

Other services in Windsor

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    Winter service

    Slippery Paths, Steps and Patios

    Winter cleaning that removes slippery algae and moss from paths, steps and patios, planned around the forecast.

    • Slippery growth removed
    • Planned around frost
    • Chiltern EverGuard™ where suitable
    Learn Moreabout Slippery Paths, Steps and Patios

Looking after a commercial building, a managed site or a portfolio? Commercial roof cleaning is handled by our commercial team, surveyed and priced as a specified job.

Chiltern Surface Co

Arrange a free site visit for your roof.

We will walk round the property with you, look at each roof level and its details, and explain the order and method we would use. A clear quotation follows the visit.

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  • Surface-specific recommendations

    We assess your surfaces and recommend the right approach for the best, long-lasting results.

  • Clear, fixed quotation

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  • No pressure or obligation

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  • Directly with the owner

    Speak directly with the owner and get expert advice you can trust.