Why Brighton Driveways Turn Green (And How to Fix It)

Why Brighton Driveways Turn Green (And How to Fix It)

by adam

You’ve pressure-washed it once. Maybe twice. And yet, a few months later, there it is again — that creeping green film crawling back across your block paving or tarmac. If you’re a homeowner in Brighton, Hove, or anywhere along this stretch of the Sussex coast, you’ll know the feeling. The damp sea air, the shaded front gardens, the mild winters — it all adds up to ideal conditions for algae, moss, and lichen to make themselves right at home on your driveway.

So why does it keep coming back, and what can you actually do about it?

It’s Not Just a Cosmetic Problem

A green or black driveway is easy to dismiss as just an eyesore. But the biological growth sitting on your paving is actually breaking it down over time. Algae and moss trap moisture against the surface, and that moisture works its way into tiny cracks and pores. Come winter, when temperatures drop overnight, that water expands and chips the surface from the inside out.

Lichen is the worst offender — it actually bonds with stone and concrete, and its root-like structures (rhizines) work their way into the material itself. Left long enough, lichen can permanently stain or pit your driveway surface.

Beyond the structural side of things, a slippery green driveway is a genuine safety hazard. Wet algae on a sloped drive is practically a skating rink.

Why the Brighton and Hove Climate Makes This Worse

It’s not your imagination. Homes along the coast — whether you’re in Hove, Portslade, or Shoreham — tend to have worse issues with biological growth than properties further inland. The reasons are fairly straightforward:

Moisture. The coastal air carries more humidity, and sea fog rolls in regularly during spring and autumn. Surfaces stay damp for longer, especially north-facing driveways and those shaded by walls or overhanging trees.

Mild temperatures. Unlike inland areas that get sharp frosts, the coast’s milder winters don’t kill off the algae and moss the way you might expect. They just go dormant and bounce back as soon as conditions warm up.

Traffic and grime. Coastal towns like Brighton also have the added fun of salt in the air, which actually encourages certain types of biological growth. Add traffic pollution into the mix, and your driveway becomes a magnet for grime.

What Doesn’t Work (And Why)

A lot of homeowners make the same mistake: they hire someone with a pressure washer, the driveway looks great for a couple of months, and then it’s back to square one.

Here’s the thing — pressure washing alone only removes the surface growth. It doesn’t treat the underlying spores embedded in the surface, and it doesn’t apply anything to slow the regrowth. In fact, if done at too high a pressure, it can open up the surface texture and make your driveway more susceptible to future growth.

Similarly, bleach-based DIY products from the garden centre often do more harm than good on certain surfaces, and the results rarely last more than a season.

What Professional Driveway Cleaning Actually Involves

A proper driveway cleaning job is a bit more involved than most people realise. Done right, it typically includes:

Soft washing or low-pressure washing — using the appropriate pressure for the surface type, whether that’s block paving, tarmac, concrete, or gravel.

Biocide treatment — this is the key step that most DIY approaches skip. A professional-grade biocidal solution is applied after cleaning to kill off any remaining spores and slow the return of algae and moss. Some treatments keep working for months after application.

Jointing sand replacement — on block paving driveways, pressure washing strips out the sand between the blocks. Replacing it is important for the structural integrity of the surface and shouldn’t be overlooked.

Re-sealing (where appropriate) — on certain surfaces, applying a sealant after cleaning adds a protective layer that makes the surface less hospitable to biological growth and easier to clean in future.

The team at PPC Window Cleaning handles all of these stages, which is why customers in Brighton and Hove tend to find their driveways stay cleaner for much longer after a professional clean than after a quick DIY blast.

How Often Should You Have Your Driveway Cleaned?

For most properties in the Brighton area, an annual professional clean is a reasonable benchmark. Properties with heavy shade, damp conditions, or overhanging trees might benefit from a clean every six to nine months.

Between professional cleans, a quick brush down and a proprietary algae inhibitor spray can help keep things in check. But these are maintenance measures, not a substitute for a proper clean when the surface needs it.

Decking and Patios: The Same Problem, Different Risks

If you’ve got a timber deck or a stone patio alongside your driveway, you’re probably dealing with the same issues — and in some cases worse ones. Wet timber decking with algae growth is genuinely dangerous underfoot, especially for older family members or young children.

The approach for decking is slightly different to hard paving, because the wrong chemicals or too much pressure can damage the wood grain or strip protective treatments. Professional cleaning for decking involves lower pressures and specialist products designed for timber.

Patios — whether Indian sandstone, porcelain, or concrete slabs — each have their own quirks when it comes to cleaning. Porcelain, for instance, is relatively low maintenance but the grout joints can still harbour biological growth. Sandstone is beautiful but porous and needs careful treatment.

PPC Window Cleaning works across all these surface types throughout Brighton, Hove, Chichester, Bognor Regis, and Littlehampton — so if you’ve got a mix of surfaces around your property, it’s not a problem.

Getting a Quote

If your driveway, patio, or decking is looking worse for wear, it’s worth getting a professional to take a look. A quick survey of your surface type and current condition takes minutes, and it means you’ll get the right treatment rather than a one-size-fits-all approach.

You can reach PPC Window Cleaning on 0800 677 1718 or visit ppcwindowcleaners.uk to find out more. They cover Brighton, Hove, Chichester, Bognor Regis, and Littlehampton, so wherever you are in the area, they’re not far away.