Most people assume exterior cleaning in winter is a waste of time. Jet washing feels like a sunny Saturday job. Round here it’s often the other way round. The damp North West winter is when moss and algae grow fastest, and it’s a sensible time to get surfaces cleaned and protected before spring.
In this post
Why does moss and algae grow so much in winter?
Because winter gives it everything it wants. Cold, wet, low-light months are perfect for green growth. The sun sits low and barely reaches some gardens. Surfaces stay damp for days between showers. Moss, algae and black spot all spread while it’s like that.
So if you wait for summer, you’re cleaning up after the growth has had months to dig in. Cleaning in winter tackles it while it’s at its peak. I see the same thing every year. Drives and patios that looked fine in September are green by Christmas.
Is it worth cleaning paths and patios before winter gets going?
Yes, mainly for safety. Algae-covered paths and steps get dangerously slippery when they’re wet. A clean surface with the growth treated is far safer for you, your family and anyone calling round. That matters most in exactly the months when it’s dark by five and everything’s damp.
The treatment is the important part. Sodium hypochlorite kills the moss and algae during the clean. A biocide then soaks in afterwards and slows the regrowth down for months. I’ve gone into the slippery slab problem in more detail in my post on why patios go slippery in winter. If yours is already a hazard, my patio cleaning service is the place to start.
What exterior cleaning should you do in winter?
Gutters come first for me. Blocked gutters overflow every time it rains, and winter is when that does the damage. Water pours down the brickwork or onto the same corner of the patio all season. My gutter cleaning uses a 15 metre reach vacuum, so I clear them from the ground without ladders. There’s more on that in my post on gutter cleaning before winter.
Driveways, patios and paths are all fine to clean in winter. So are roofs, where moss holds water against the tiles through the wettest months. Have a look at my roof cleaning page if yours has gone green. Block paving can be cleaned any time, but the re-sanding waits for a dry spell.
Quick tip: clear wet leaves off drives and patios as often as you can through autumn and winter. A pile left sitting for a week stains the surface and feeds the algae underneath.
What weather stops exterior cleaning?
Hard frost is the main one. Frost-free days are perfectly suitable for professional cleaning, even when it’s cold. The problem with frost is the water from the clean. If it freezes on the surface you’ve swapped a green slippery drive for an icy one.
Rain doesn’t stop most jobs, since the surface gets soaked during a clean anyway. It does hold up anything that needs drying first, like sanding or driveway sealing. I keep an eye on the forecast and plan work around the weather. If your day looks bad, I’ll move it rather than do a half job.
Is winter a quieter time to book exterior cleaning?
It usually is, and that’s a real advantage. Spring and summer fill the diary up fast because everyone has the same idea at once. Booking in the quieter winter months means your driveway, patio and paths are already looking their best when spring arrives. No waiting on a busy summer schedule.
I work right across Liverpool, the Wirral and Sefton, including Southport. Have a look at my Liverpool jet washing and Wirral jet washing pages for the areas I cover. There are winter before and afters on my Facebook page too.
FAQs
No, I don’t charge extra for winter work. Driveway and patio cleaning starts from £100 all year round. The price depends on the size of the area, the surface and how much growth has built up, not the month. If anything, winter is often easier to book because the diary isn’t as packed. The quickest way to get a price is to send me photos or a short video on WhatsApp to 07469 539 068. You get 10% off for quoting that way because it saves me driving out to look. If you’d rather speak to someone, ring 0151 272 3404 and I’ll talk it through with you.
Yes, and the WhatsApp quotes work exactly the same in December as they do in June. Send a few photos of whatever needs doing and I normally reply within about five minutes. Winter light can be poor, so try to take the photos in the middle of the day if you can. A shot from a distance and one up close is usually enough. If it’s gutters or a roof, a picture from the street showing the full front of the house helps. I’ll ask if I need anything else. Most jobs never need a visit just to price them, which keeps things moving even when the days are short.
The clean itself takes about the same time as it would in summer. Where winter adds time is anything that needs the surface to dry. Block paving re-sanding and sealing both need dry conditions, and in winter that doesn’t always happen on the same day. So a job that would be one visit in July might be two in January. The first visit does the clean and the treatment. The second comes back for the sand or sealer once there’s a dry spell. It also gets dark early, so I plan bigger jobs to start in the morning. I’ll tell you when I quote if it’s likely to need two visits.
Yes, as long as the growth is killed and not just blasted off the top. That’s the key difference. A clean with water alone makes the surface look good for a few weeks, then the algae in the pores grows back. When I clean, sodium hypochlorite kills the moss and algae during the job. On drives, patios and roofs a biocide then soaks in and slows the regrowth for months. That protection carries you through the rest of the winter and into spring. Nothing stops growth forever in Merseyside weather. Done properly, though, a winter clean lasts just as well as one done in the summer.
Not on a frost-free day. Cold on its own isn’t a problem for paving or for the clean. The risk comes from frost, when water left on the surface can freeze. That’s why I won’t clean during a hard frost. It isn’t safe for anyone walking on it afterwards. On porous stone there’s also a risk with water sitting in the surface and freezing overnight. I check the forecast before every winter job. If there’s a frost due, I’ll move the booking to a better day. I’d rather call you to rearrange than leave you with an icy drive that someone could slip on.
Often, yes. Moss on a roof holds water against the tiles right through the wettest months. It also sheds clumps into the gutters, which then block and overflow. Getting moss off before or during winter stops that cycle going all season. I kill the growth with sodium hypochlorite and finish with a biocide that slows it coming back. The weather matters more on roofs than on the ground, so I’m a bit fussier about the forecast. Wind and frost both put roof work on hold. If your roof is badly mossed, send me a photo from the street and I’ll give you an honest view on whether it’s worth doing now.
For most homes, once a year is about right. A yearly clean timed before or during winter keeps paths safe through the slippiest months. It also means the house looks right going into spring. Gutters are worth checking every year too, ideally after the leaves have come down. Shaded spots, north facing gardens and anything under trees may need a top up in between. Sunny, open drives can often go longer. My post on how often to jet wash a driveway goes into more detail. If yours can wait, I’ll tell you that rather than book you in for the sake of it.
Not usually. For most outdoor jobs I just need access to the area and an outside tap. My hoses are 50 metres long, so the van can stay on the road and I rarely need to come through the house. If a side gate needs unlocking, leave it open on the day or let me know where to find a key. Cars do need to be off a driveway before I start, otherwise I can’t clean underneath them. I’ll message you when I’m on the way and when I’ve finished. You can then have a look when you’re back. If you’re away, I can send you a few photos of the finished job.
Usually, yes. Most people only think about cleaning once the sun comes out, so spring and summer get booked up quickly. Winter has more space in the diary. That means you can often get a date sooner and pick a day that suits you. It also means your driveway, patio and paths are already done when spring arrives. You won’t be waiting in a queue with everyone else in April. The only catch is the weather, since I do have to move jobs for hard frost. That’s rarely more than a short delay, and I’ll always keep you posted if your date needs to change.
Most of the time I carry on. A clean soaks the surface anyway, so rain makes very little difference to the jet washing itself. Heavy rain can slow things down and make it harder to see how the finish is coming up, but it rarely stops the job. What rain does stop is the work that needs a dry surface. Re-sanding block paving and sealing a drive both wait for a dry spell. If it’s going to be a washout, I’ll message you before setting off. You can then decide whether to go ahead with the clean and leave the sand, or move the whole job to another day.
Want it sorted before the worst of the weather?
Send me a few photos on WhatsApp and I’ll get you a price, usually within about five minutes. You’ll get 10% off for quoting that way, and winter dates are often easier to get than summer ones.
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