Roof Cleaning in Horley
Roof Cleaning in Horley: moss and organic growth taken off the tiles by soft washing or pressure washing, whichever suits the roof. Horley is the home patch, so this is a local job. 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 Horley
Roof cleaning in Horley usually means moss removal from concrete interlocking tiles, the standard covering on post-war and later housing and the tile most prone to moss. If that is what is on your roof, the pattern will be familiar. Concrete is porous, so it holds moisture in the surface, and moss only needs a damp footing to take hold. On two identical roofs side by side, the north pitch is routinely green while the south pitch stays comparatively clear. That is not coincidence, that is drying time.
Why moss picks the north pitch first
The pitch that faces north or sits in shade never gets the sun on it long enough to dry out properly between rain. The tile surface stays damp, moss establishes, and once it is there it holds even more water against the tile.
That is the actual problem with roof moss, more than the look of it. A saturated moss mat keeps the tile permanently wet, which matters in frost, and lumps of it break away and pack the gutters solid. Plenty of blocked gutter calls are really a roof moss problem that has moved downhill.
What a moss clean can and cannot do for a concrete tile
Concrete tiles are made with a coloured surface layer over grey concrete underneath. Over decades that surface weathers and the tiles fade towards grey, and moss growing on them accelerates it.
Removing the moss stops the process getting worse and stops the water being held against the tile. It does not restore the original colour, because that is weathering, not dirt. A clean roof that is still a bit faded is a good outcome. Tiles that have been up for thirty years are not going to look new again, whatever anyone tells you.
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.
Other services in Horley
Roof Cleaning near Horley
Roof Cleaning: questions these guides answer
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 Horley: your questions answered
Does moss actually damage a roof, or does it just look bad?
It does real harm as well as looking bad. A moss mat holds water permanently against the tile, which matters in frost when that water freezes and expands, and it blocks the flow off the roof so water can back up under the tile edges. It also breaks off in lumps and packs the gutters solid, which is where most of the practical damage starts.
How do you get moss off a roof safely?
By matching the method to the tile and the pitch after looking at it properly. On sound concrete tiles that generally means carefully removing the bulk of the moss and applying a biocide to kill what remains at the root. What it never means is standing on the roof blasting it with a high-pressure lance, which drives water under the tiles and strips the tile surface.
Will you clear the gutters after cleaning the roof?
It should be, and it is worth confirming it is in your quote. A roof clean that leaves the gutters packed with moss has only moved the problem down a metre, because everything coming off the roof heads straight for them. Clearing them afterwards is part of finishing the job properly rather than a separate visit.
Will roof cleaning make my tiles look new again?
The improvement is usually substantial, but a faded tile stays faded. It will make them clean, not new. Concrete tiles have a coloured surface layer that weathers and fades over decades, and that fading is wear, not dirt, so no clean reverses it. What cleaning does is remove the moss and growth, stop water being held against the tiles and stop the situation getting worse.
How long does roof moss treatment take to work?
The visible moss is dealt with on the day, and the biocide keeps working for weeks or months afterwards. Treated moss dies and then weathers off gradually with the rain and wind rather than disappearing on the day, so the roof carries on improving after we have left. We would rather tell you that upfront than have you wondering why it is not finished by teatime.
Roof Cleaning in Horley, done properly
Free, no-obligation quotes across Surrey, Sussex and Kent. Send a few photos and we will do the rest.