Roof Cleaning in Redhill
Roof Cleaning in Redhill: moss and organic growth taken off the tiles by soft washing or pressure washing, whichever suits the roof. Redhill is just down the road from the Horley base. 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 Redhill
Roof cleaning on an older Redhill property often means dealing with natural slate, the covering where the wrong approach does the most expensive damage. A slate roof is not a sealed surface, it is hundreds of individual slates hung on nails, and the two things that finish them off are water forced up underneath and the nails corroding. A pressure washer contributes to both.
Why slate should never be pressure washed
Slate laps rely on gravity: water runs down over the slate below and off the roof. Direct a jet upwards or sideways at the laps and you drive water the wrong way, straight into the roof space and onto the battens and nails.
Slate also delaminates. It is a layered stone, and old slates that have weathered will split along those layers if you hit them hard enough. A roof that was serviceable can be shedding slates within a season of a bad clean, and slate is not cheap to put back.
Nail sickness, and knowing when to leave a roof alone
Old slate roofs eventually fail because the fixing nails corrode away, not because the slate wears out. That is nail sickness, and the tell-tale sign is slipped slates appearing here and there for no obvious reason.
On a roof showing that, any work up there risks dislodging more, and the answer is usually a roofer, not a cleaner. That much is usually visible from the ground and from the access. Turning work down is part of doing this properly.
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 Redhill
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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 Redhill: your questions answered
Can a slate roof be pressure washed?
No, it should not be. Slate roofs work by lapping, so water is meant to run down and off, and a jet forced up or across the laps drives water into the roof space and onto the battens and fixings. Slate also splits along its natural layers when it is hit hard. Where a slate roof needs attention it is treated gently, not blasted.
What is nail sickness, and how do I know if my roof has it?
It is the corrosion of the nails holding the slates on, and it is how most old slate roofs eventually fail. The usual sign is individual slates slipping for no apparent reason, often after wind, appearing in different places over a few seasons. A roof doing that needs a roofer, not a cleaner, because any work up there risks dislodging more.
Would you ever tell me not to clean my roof?
We do. Where a roof is brittle, showing slipped slates, has failing fixings or is in poor enough condition that access risks doing damage, the right advice is to leave it and get a roofer to look at it. We would rather turn a job down than take money for something that leaves you worse off.
How do you clean a roof on a Victorian or older property?
Cautiously, with the method set by the covering and its condition. Older roofs are more likely to have natural slate, clay plain tiles or original stone, all of which are more fragile than modern concrete tiles, and older timbers and fixings tolerate less disturbance. That normally means gentle treatment and minimal contact rather than any kind of aggressive cleaning.
Can you tell what my roof is made of from the ground?
Usually yes, and we always look before quoting. Natural slate, concrete interlocking tiles, clay plain tiles and artificial slate are all distinguishable from ground level with a bit of experience, and photographs help. Where it is not clear, we say so instead of guessing, because the covering decides the entire method.
Roof Cleaning in Redhill, done properly
Free, no-obligation quotes across Surrey, Sussex and Kent. Send a few photos and we will do the rest.