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Around 42% of domestic garden space in the UK is now paved over. Patios, paths and paved areas make up a huge share of that, and with the North East's wet climate, moss, algae and black spots build up fast.
At Northern Powerwash, we provide a professional patio cleaning service across the North East and North Yorkshire. Whether your patio is covered in green algae, stubborn black spots or years of built-up dirt, we get it looking clean again.
Limestone is a softer natural stone that needs a gentler approach than concrete or block paving. It holds moisture in a similar way to sandstone and is particularly prone to green algae, moss and lichen in shaded or damp garden areas.
The cleaning method matters with limestone. Too much pressure causes surface erosion on older or softer slabs. We assess each limestone patio individually and use lower pressure with appropriate cleaning solutions to remove organic growth without causing long term damage to the surface.
Sealing after cleaning helps protect limestone from moisture absorption, staining and further organic growth. We offer cleaning and sealing as a combined service for limestone patios where the surface would benefit from additional protection going forward.
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Concrete is a more robust material than natural stone and handles pressure washing well. Over time, concrete patios collect dirt, algae, moss and weather staining that builds up in layers. It can also develop green or black patches in shaded areas where moisture sits.
Pressure washing is particularly effective for concrete because the surface can take higher pressure without risk of damage. We use professional equipment that delivers the consistency and power needed to remove years of built-up staining in a single visit. A job that would take a homeowner a full weekend can be completed in a fraction of the time with the right equipment behind it.
Sealing concrete after cleaning helps protect the surface against future staining and slows down the return of organic growth. It is worth considering for patios that are in a shaded or damp position where algae and moss tend to come back quickly without additional protection.
Block paving is a popular choice for patios and driveways across the North East. Over time, the joints between the blocks collect weeds, moss and dirt, and the surface itself develops algae and staining from weather exposure.
Block paving cleaning removes the surface growth and the ingrained dirt from both the blocks and the joints. Because the cleaning process displaces the sand between the blocks, re sanding is often needed afterwards to restore a stable, neat finish. We carry out re sanding as part of the service where required.
Sealing block paving after cleaning gives the surface additional protection and significantly slows how quickly weeds and organic growth return to the joints. It also makes the surface easier to maintain between cleans. We discuss sealing options with every customer when we quote so you can decide what is right for your patio.
Porcelain has become a popular patio surface because it is less porous than natural stone and easier to keep clean in general. However, even porcelain patios collect algae, moss and surface staining over time, particularly in wetter months or in gardens with limited sunlight.
Because porcelain is a denser surface, it responds well to controlled pressure washing with the right cleaning solutions. We remove the algae, staining and surface grime without the risk of scratching or dulling the surface finish that can happen if the wrong equipment or products are used.
We do not use one method for every job. The right approach depends on the surface material, the type of staining and the condition of the patio when we arrive.
Pressure washing uses high pressure water to lift dirt, weeds, moss, oil stains and grime from hard-wearing surfaces. It works well on concrete, block paving and tougher paving slabs. Our professional equipment delivers consistent results that a domestic machine cannot match.
Cold water jet washing alone leaves organic spores behind, which doesnt fully remove moss ,algae and mould as making them return faster than they should. Soft washing uses lower pressure combined with specialist cleaning solutions to treat the root cause of the growth. We use soft washing where organic growth such as algae, mould or lichen is the main problem.
Steam cleaning uses heat at lower pressure and is a better option for natural stone patios and older paving slabs where high pressure would cause damage. We carry steam cleaning equipment and use it where the surface calls for it.
Cleaning removes what is already there. Sealing gives the surface additional protection against what comes next.
Re-sealing after cleaning helps lock out moisture, slows down organic regrowth and makes the surface easier to maintain going forward. For block paving in particular, sealing after cleaning gives a much more consistent and long-lasting finish. We only seal once the surface is genuinely clean. Sealing over dirt or damp traps the problem in rather than solving it.
For patios with heavy algae, lichen or black spot, we apply a biocide treatment as part of the cleaning process. This targets organic growth at the source rather than just washing the surface down. It is one of the most effective ways to deal with stubborn staining that has built up over multiple seasons and helps prevent it from coming straight back.
Based on recent jobs across the North East and North Yorkshire, patio cleaning typically starts at around £150 to £200 for a small to medium-sized patio. Larger patios or those needing cleaning and sealing together tend to sit between £300 and £600 depending on the surface area and condition of the patio.
**These figures are a rough guide. The actual cost for your job depends on the size of the area, the surface type, the level of soiling and whether sealing or re sanding is required. The best way to get an accurate price is to request a free quote.
We are fully insured, carrying public liability insurance on every job. Hiring a cleaning service that is not insured carries unnecessary risk for the homeowner. If something goes wrong, the liability can fall back on you, which is not a position anyone wants to be in.
Our team is fully trained in surface-specific cleaning methods. We bring professional equipment and the right products for each surface type. Around 88% of households in Great Britain have access to a private or shared garden, and for most of those homeowners a clean, safe patio makes a genuine difference to how much they can use and enjoy the outdoor space.
We work to a high standard on every job. Most of our work comes through referrals from homeowners and property managers across the region who have used Northern Powerwash before and would use us again as their preferred jet washing company.
If your patio needs attention, getting started is simple. Contact us by phone or fill in our online form and we will get back to you with a free quote, no obligation.
We will assess the job, tell you exactly what needs doing and give you a clear price. Northern Powerwash covers the North East and North Yorkshire, so whether you are in Newcastle, Middlesbrough, Sunderland, Harrogate, York or anywhere across the region, get in touch today.
