Block Paved Driveway Cleaning in
High Wycombe, Buckinghamshire

Brian contacted Chiltern Surface Co to restore the block‑paved driveway at his home in High Wycombe, Buckinghamshire.

At approximately 150m², this was a substantial area of block paving affected by lichen, black spot, organic growth and accumulated environmental soiling. The growth and soiling had dulled the original appearance of the blocks, while the joints contained old sand, dirt and organic material.

Rather than treating the project as a straightforward pressure‑washing job, we approached it as a complete block‑paving restoration.

The aim was to thoroughly clean the paving, remove the old sand and organic material from the joints, carry out the necessary minor repairs, reinstate and stabilise the jointing and apply a treatment to help protect the driveway against future organic regrowth.

Free Site Visit and Assessment

Our initial site visit identified several areas of damaged paving. However, with the driveway heavily soiled, the full condition of the individual blocks could only be properly assessed once the surface had been professionally cleaned.

We therefore recommended cleaning the complete driveway before carrying out a detailed inspection and replacing the blocks that required attention.

The driveway also featured slate edging around sections of the paving. Rather than simply cleaning around it, we removed the individual slate pieces so that both the slate and the paving beneath could be properly cleaned.

During the restoration, it quickly became evident that there were issues with the drain at the bottom of the driveway.

Although this was not part of the original scope of works, we used our drainage hoses to clear the blockage while we were on site, leaving Brian's drainage running clear.

It is part of the way we approach a restoration: if we identify something during the works that we can reasonably address for the client, we will always try to help.

Once the driveway was clean, we carried out a detailed inspection and identified the individual paving blocks that required replacement.

The damaged blocks were removed and suitable replacements installed, matching the existing paving as closely as possible.

With the cleaning and remedial work complete, the driveway was then allowed to dry fully before the jointing process began. Polymeric sand cannot be worked into damp joints and will not set correctly on a wet surface, so this stage is governed by the weather rather than the schedule. On this project that meant returning for a second day rather than forcing the jointing in poor conditions.

Once the block paving was clean and dry, fresh polymeric sand was applied across the driveway and carefully worked into the joints.

Polymeric sand provides a more durable and stable joint than conventional kiln‑dried sand, helping to reduce joint erosion, movement and weed growth.

The driveway was then mechanically compacted using a plate compactor.

Mechanical compaction is a vital part of any block‑paved driveway restoration undertaken by Chiltern Surface Co.

The sand between the blocks on a block‑paved surface is responsible for its stabilisation. That stabilisation is compromised if re‑compaction and a second re‑sanding are not undertaken.

Following compaction, we carried out a second application of polymeric sand to ensure the joints were properly filled throughout the driveway.

Once the surface had been carefully checked and excess material removed, the polymeric sand was activated in accordance with the manufacturer's process.

The completed restoration transformed approximately 150m² of weathered and heavily soiled block paving.

The deep clean removed the lichen, black spot, organic growth and accumulated environmental soiling, bringing back the colour and definition of the individual paving blocks.

Damaged blocks were replaced, the slate edging was cleaned and reinstated, the driveway was re‑jointed with polymeric sand and mechanically compacted before receiving its final Chiltern EverGuard™ treatment.

The result was not simply a cleaner driveway, but a complete restoration: cleaned, repaired, re‑jointed, stabilised and protected for the future.

Chiltern Surface Co carried out this block‑paved driveway restoration in High Wycombe, Buckinghamshire. We also offer driveway cleaning, patio cleaning, roof cleaning and roof moss removal across Oxfordshire and Berkshire, including Henley‑on‑Thames, Thame, Maidenhead and Windsor.

Our approach goes beyond conventional pressure washing. Depending on the condition of the driveway, a restoration can include deep cleaning, specialist treatment for black spot and lichen, joint clearance, replacement of damaged blocks, polymeric re‑sanding and mechanical compaction, and long‑term protection with Chiltern EverGuard™.