British property with tiled roof showing moss growth before professional roof cleaning and moss removal
Harlow · Essex · Hertfordshire

Roof Cleaning & Moss Removal
Across Harlow, Essex & Hertfordshire.
Low-pressure. Steam-cleaned. Biocide as standard.

Low-pressure washing and steam, hand-scraping of moss, plus a biocidal treatment as standard — never harsh high-pressure that could damage tiles. Fixed-price quotes, usually returned within 24 hours.

From £650Fixed quote before any work

Prices start from the amounts shown — you'll get a fixed quote with no surprises before any work begins.

From £650 (3-bed semi) — fixed price
Free quotes usually within 24 hours
Fully insured — £5m public liability
City & Guilds qualified in biocides
Keeps moss & algae away 6+ years
Free January/February follow-up included
Service Overview

Understanding roof cleaning & moss removal

What it is

Roof cleaning is the controlled removal of moss, lichen, algae and atmospheric staining from concrete, clay, slate and composite tiles. Our method combines low-pressure washing and steam cleaning, hand-scraping of moss and a biocidal treatment applied as standard. It is not harsh high-pressure jet-washing. Done correctly it restores the original tile colour, lifts established moss and adds years to the surface life.

Who it's for

Any homeowner whose roof shows green, black or orange streaking, visible moss clumps along the ridges or in valleys, or moss debris falling into gutters and onto driveways. Particularly important for properties under tree cover, north-facing pitches, and any home older than 8 years that has never been treated.

When you need it

Late spring through early autumn is ideal — dry tiles take the biocide better and the kill-off cycle finishes before winter rain. However we work year-round, 7 days a week including weekends, in suitable weather. Often booked in within the same week — and next-day when availability allows.

Why professional help matters

Harsh high-pressure jet-washing strips the protective surface layer of concrete tiles, breaks granule bonds on composite tiles and can drive water under laps causing internal leaks. Our combination of low-pressure washing, steam, hand-scraping and biocidal treatment cleans tiles properly without that damage.

If left untreated

The cost of doing nothing.

  • Moss roots lift tile edges, letting wind-driven rain track under the lap and into the loft.
  • Lichen secretes mild acid that etches the cement matrix of concrete tiles, shortening their life by up to 30%.
  • Saturated moss can hold 20× its weight in water, adding hundreds of kilos of dead-load to the roof structure.
  • Blocked valleys and gutters from fallen moss cause overflow, fascia rot, render staining and damp internally.
  • An unmaintained roof can knock 5–10% off a property's perceived value at survey.
Common mistakes

What we see go wrong.

  • Hiring a window cleaner with a high-pressure jet washer — strips tiles in a single visit.
  • Skipping the biocide — moss returns within a year or two because spores are airborne. We include biocide as standard for this reason (skip on request if you prefer no chemicals).
  • Choosing the cheapest quote without insurance documents — falls from roofs are the #1 fatal accident in trades.
  • Treating the roof but ignoring the gutters — debris washes straight in and blocks the drop.
Our Process

A predictable system, from first call to clean-up

  1. 01

    Inspection

    Drone or ladder survey of pitch, condition, tile type, valleys, ridges and chimney flashings. Photographs shared with you.

  2. 02

    Fixed-Price Quote

    Itemised, written, no-pressure quote — usually within 24 hours. Complex roofs may need a quick site visit first. The price we quote is the price you pay; any extra work would be quoted separately first.

  3. 03

    Hand-Scrape & Low-Pressure Clean

    Bulk moss hand-scraped, tiles cleaned with low-pressure washing and steam in working sections, debris bagged off-roof — never washed into gutters.

  4. 04

    Biocidal Treatment (standard)

    Biocidal wash applied to every surface as standard, to slow moss and algae returning. Optional — skip on request if you prefer no chemicals.

  5. 05

    Clean-Up & Free Follow-Up Booked

    Gutters cleared, drives rinsed of run-off, written job summary issued. Free January/February follow-up visit booked to re-clear gutters of debris at no charge.

The Benefits

What you actually get for the money.

  • Low-pressure, never damaging

    Low-pressure washing, steam and hand-scraping — clean tiles without the damage of high-pressure jet-washing.

  • Biocide as standard (optional)

    Our roof cleans keep moss and algae away for at least 6 years. After that, a quick biocide top-up keeps your roof protected. Happy to skip the biocide if you prefer no chemicals.

  • Free follow-up visit

    Free January/February visit included to re-clear gutters of debris. No charge, no upsell.

  • Fixed-price quotes

    The price we quote is the price you pay. Any extra work would be quoted separately first.

  • £5m public liability cover

    Fully insured. City & Guilds qualified in the professional use of biocides. Documents on request.

  • Local accountability

    Family-run from Harlow CM18. Open 7 days a week, including weekends.

Deep Detail

The technical bit — for the people who like to know

Tile types we treat

Marley & Redland concrete (Mendip, Modern, Wessex), Sandtoft, Marley Eternit slate, Welsh slate, Spanish slate, Forticrete and most clay pantiles. Each requires a different cleaning approach and biocide dilution — we calibrate per job.

Our method vs harsh pressure washing

Harsh high-pressure jet-washing (3,000+ psi) strips tile surfaces. Our method combines low-pressure washing and steam cleaning with hand-scraping of moss and a biocidal treatment as standard. You get a proper physical clean without stripping tiles, plus chemical treatment to slow regrowth.

Moss vs lichen vs algae

Moss is the visible green pad — physical hand-scraping needed. Lichen is the orange/yellow crust — bonds to tile chemistry, needs biocide dwell-time of 20+ minutes. Algae (gloeocapsa magma) is the black streak on north slopes — purely a biocide job, no scraping required. We identify the dominant contamination on inspection.

Access & safety

Roof ladders, edge protection and bagged-debris protocols mean nothing falls and no neighbours are inconvenienced. Fully insured with £5m public liability cover. Tower scaffolding set-up where access requires it — factored into the quote.

Residential vs commercial roofs

Domestic pitched roofs are our core. We also clean small commercial pitched roofs (offices, units, schools) — typically scheduled out-of-hours. RAMS documentation available on request for commercial jobs. Flat roofs and industrial profiled metal are handled by separate specialist quotation.

FAQ

Straight answers to common questions

A new-looking roof, without a new-roof price.

Roof cleaning from £650. Fixed-price quote usually within 24 hours.

Fully insured · Companies House #15556482 · Family-run · 4+ years

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