Roof Cleaning in Horsham
Roof Cleaning in Horsham: moss and organic growth taken off the tiles by soft washing or pressure washing, whichever suits the roof. Horsham is reached from just over the Surrey border in Horley. The first step is a free, no-obligation quote.
- Moss and organic growth removal
- Soft washing or pressure washing to suit the roof
- Treatment options to help prevent moss returning
- Domestic and commercial roofs
Roof Cleaning for homes and businesses in Horsham
A Horsham roof might be standard modern concrete tiles or a genuinely old covering on a period property out in the Weald, and the two could not be more different to work on. The first question on any Horsham roof is therefore what it is actually made of, because that single answer decides everything else about the job.
Old stone slab roofs need a different mindset entirely
Traditional stone slab roofs turn up on older buildings in this part of the Weald. The slabs are heavy, thick, porous and irregular, they are hung rather than nailed flat, and they carry a lot of moss and lichen precisely because they hold moisture.
They are also the covering it is easiest to ruin. A stone slab roof will not tolerate pressure washing, will not tolerate being walked on carelessly, and is expensive and slow to repair with matching material. On a roof like that the correct answer is frequently to treat the growth gently and leave the slabs alone, and sometimes to recommend nothing at all.
Tree cover on a roof is the underlying problem
A roof under a mature canopy gets leaf fall into the valleys and gutters every autumn, permanent shade so it never dries, and constant organic debris feeding the growth. The roof is not the problem, the canopy is.
Cleaning a roof under trees works, and it needs repeating sooner than an open roof does. The valleys are the part to keep an eye on: they collect leaves, block, and back water up under the tiles, and that is a leak, not a cosmetic issue.
How we work
- 1Ground survey and access plan
We look at the tile type, the pitch, the condition and how we are getting up there safely. Concrete interlocking, clay plain tiles, slate and older stone slabs all need a different touch, and a brittle tile is a repair bill waiting to happen.
- 2Agree the method before anything gets touched
Some roofs suit careful scraping of the dry moss, some suit a soft wash and biocide, some suit both, and a few are best left alone. We tell you which one yours is, including when the answer is that a clean is not worth doing.
- 3Remove the growth and control where it falls
Moss coming off a roof goes straight into the gutters and all over the ground below. That wants managing as the work goes on rather than leaving a garden full of it.
- 4Clear the gutters and downpipes afterwards
A roof clean that leaves the gutters packed with moss has only moved the problem. Clearing them is what finishing the job properly looks like, so it is worth confirming it is in your quote.
- 5Biocide treatment and the honest timescale
Where a treatment is used, it keeps working for weeks or months after we leave. The roof carries on lightening instead of looking finished the same afternoon, and that is worth knowing upfront.
We assess each roof first and use the safest method for the tiles and pitch.
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Real results
Roof Cleaning: before & after
Genuine before and after results from recent jobs across Surrey, Sussex and Kent.
Customer reviews
What our customers say
Dirty South Power Wash were absolutely fantastic from start to finish. They're extremely friendly, professional, and reliable, making the whole process completely stress free. I had my decking soft washed and the results were amazing, it genuinely looks like new and has been brought back to life. You can really tell they take pride in their work and pay attention to detail. I wouldn't hesitate to recommend them to anyone and will definitely be using their services again in the future!
No fuss, just excellent - from start to finish. Friendly to deal with, clear communication all the way, came when they said they would, did an excellent job. Would use again without a doubt.
Great service, really pleased with our garage roof. All the moss has gone and left nice and tidy. Great guys too. Thanks!
Did a fantastic job on a garage roof clean/moss removal, looks good as new! friendly & professional highly recommend 👏🏼
Really pleased with our driveway😊
They done an amazing job and great price
Good to know
Roof Cleaning in Horsham: your questions answered
Can you clean an old stone slab roof?
Sometimes, and always very gently, and sometimes the honest answer is to leave it. Traditional stone slab roofs are heavy, porous and irregular, and they will not tolerate pressure washing or careless foot traffic. Where a roof like that is sound, growth can often be treated gently. Where it is not, it needs a roofer familiar with the material, not a cleaner.
My roof is under trees and always mossy. What can be done?
It can be cleaned and treated, and it will need doing again sooner than an open roof would. Tree cover means permanent shade, constant leaf fall and a roof that never dries out, which is exactly what moss and lichen need. The most important part is keeping the valleys and gutters clear, because blocked valleys back water up under the tiles.
Why do valleys and gutters matter more than the tiles?
Because they are where water actually leaves the roof. A tile with moss on it is mostly cosmetic. A valley packed with leaves and moss backs water up under the tile edges, and that is how you get a leak. On any roof under tree cover, clearing the valleys and gutters is the part that protects the building.
Do you clean roofs on barns, outbuildings and larger properties?
The same rules apply: what is the covering, what condition is it in, and how do we reach it safely. Larger and older buildings mainly need more planning around access. On agricultural or converted buildings the covering can be anything from modern sheeting to original stone or clay, so we identify it before quoting.
How often does a roof need cleaning?
Far less often than a patio or a drive, and only when there is a reason. An open roof in decent condition may go many years without needing anything. A shaded roof under trees builds moss much faster and benefits from attention every few years, mainly to keep the valleys and gutters working. Cleaning a roof simply out of habit is not something we would push.
Roof Cleaning in Horsham, done properly
Free, no-obligation quotes across Surrey, Sussex and Kent. Send a few photos and we will do the rest.