Jet washing is one of the most effective ways to refresh and clean block paving. Whether it’s your driveway, patio or garden path, removing dirt, moss, algae and general surface grime with a pressure washer can reveal a surface that looks brand new again. But once the washing is done, the job isn’t over. In fact, what you do after jet washing your block paving is just as important as the cleaning itself. Failing to follow up with proper maintenance steps can lead to loose blocks, weed growth and a surface that deteriorates much faster than it should.
At Regal Resin Group, we carry out professional cleaning and restoration of block paving in Swansea and across South Wales. Many homeowners contact us after trying to refresh their paving with a jet washer, only to realise that the blocks are shifting or the sand between the joints has disappeared. That’s because high-pressure cleaning doesn’t just remove dirt—it also removes the stabilising sand and can loosen the surface if it’s not properly managed. To get the best and longest-lasting results, you need to take a few extra steps after the cleaning is done.
Assess the Condition of the Joints and Surface
After jet washing, the first thing to do is assess the condition of the paving. Walk over the area and check whether any blocks feel loose underfoot or have shifted during the cleaning process. It’s not uncommon for older paving to move slightly if the jointing material has already started to break down. If this has happened, it’s best not to ignore it. Even minor movement can lead to further problems if left unaddressed.
You should also inspect the joints between the blocks. If the sand has been fully or partially removed during cleaning, you may see gaps that weren’t visible before. These gaps weaken the surface as a whole, allowing water to penetrate deeper and making it easier for weeds to take root. In places like Swansea, where regular rain is a given, this can lead to rapid erosion of the sub-base and eventual sinking of the paving.
At this stage, it’s helpful to clear any remaining debris and ensure the surface is dry before moving on to the next step. Working on a clean, dry surface will give better results for everything that follows.
Re-sand the Joints with Kiln-Dried Sand
Once the surface is dry and assessed, the next vital step is re-sanding the joints. This involves sweeping kiln-dried sand back into the gaps between the blocks. Kiln-dried sand is specifically designed for block paving and is extremely fine and dry, which allows it to fall neatly into the narrow joints and compact well.
Re-sanding does more than just fill a visible gap—it helps to stabilise the entire paving structure. The sand locks the blocks in place and prevents lateral movement, especially under the weight of vehicles or foot traffic. Without this sand, blocks can shift and tilt, leading to trip hazards or drainage issues.
This step is especially important for block paving in Swansea, where many homes are exposed to damp and windy conditions that can quickly wash away loose material. Once the sand is applied, it should be swept in thoroughly and then compacted where possible using a plate compactor or manual tamper. This encourages the sand to settle deeper and ensures longer-lasting stability.
Consider Applying a Sealant for Extra Protection
After re-sanding, applying a block paving sealant is highly recommended, particularly for high-traffic areas or surfaces that are exposed to harsh weather. Sealants provide a protective layer over the paving, helping to bind the jointing sand in place, repel water, and reduce weed and moss growth. They also enhance the colour of the paving, giving it a richer, more polished finish that lasts longer than cleaning alone.
There are different types of sealants available, including water-based and solvent-based versions, with finishes ranging from matt to high-gloss. The right choice depends on the look you want and how your driveway or patio is used. In general, we recommend a breathable, UV-resistant sealant that allows moisture to escape from beneath the blocks while protecting the surface from above.
In Swansea, where coastal moisture and regular rain can affect outdoor surfaces throughout the year, sealing your block paving helps slow down the natural ageing process. It also saves time in the long run, as it reduces the frequency with which deep cleaning is needed. At Regal Resin Group, we offer professional sealing services using high-performance products that are safe for both the environment and your paving.
Maintain the Surface Regularly After Cleaning
Once your paving has been cleaned, re-sanded and sealed, it’s important to keep up with regular maintenance to ensure it stays in top condition. Even the best-laid and best-maintained block paving won’t stay spotless forever, especially in an area like Swansea where weather and greenery can quickly make their mark. A gentle sweep once a week can help prevent leaves, soil and organic matter from building up between the joints and encouraging weed growth or algae.
Light cleaning with a hose and a soft brush every few months can help keep the surface free from stains and keep the colour looking sharp. If you’ve had your surface sealed, this regular upkeep will be even easier, as dirt and debris will have a harder time sticking to the surface.
You should also keep an eye on any areas where jointing sand appears to be eroding or where blocks feel uneven. Spot repairs are simple if dealt with early, but ignoring these signs can lead to bigger problems over time. A few minutes of inspection every few weeks can save you from more expensive repairs down the line.
When to Call in the Professionals
While many homeowners enjoy the satisfaction of jet washing their own paving, the follow-up steps are where things can get tricky. Re-sanding properly, applying sealants evenly, and correcting any loose blocks takes time, the right tools, and a bit of experience. If you’re not confident doing it yourself—or if your paving is showing signs of deeper issues like subsidence or drainage failure—it’s wise to call in a professional.
At Regal Resin Group, we’ve helped hundreds of clients restore and protect their block paving throughout Swansea. We provide full restoration packages that include deep cleaning, joint replacement, surface sealing, and any necessary repair work to make sure your paving not only looks great but performs properly too.
We often get called out after a DIY job hasn’t gone to plan. Sometimes the wrong type of sand has been used, sealant has been applied too soon, or the paving hasn’t been given time to dry fully before work resumed. These issues can all affect how long your paving lasts. By hiring a team that specialises in block paving care, you’re ensuring a better outcome with longer-lasting results.
Final Thoughts
Jet washing is a great way to bring tired block paving back to life, but it’s only part of the process. If you stop at cleaning alone, you risk leaving the surface vulnerable to shifting, weed growth and faster deterioration. To get the most out of your paving, you need to follow up with proper re-sanding, sealing and regular maintenance.
In Swansea, where outdoor conditions can be particularly harsh on paved surfaces, these extra steps are even more important. At Regal Resin Group, we help homeowners and businesses protect their investment by offering professional cleaning, sealing and repair services tailored to the local climate and usage needs.
If your paving looks a little tired or you’ve recently jet washed it and aren’t sure what to do next, we’re here to help. Get in touch with Regal Resin Group today for expert advice, a no-obligation quote, or to book a professional restoration service that keeps your paving looking its best all year round.