Commercial Car Park & Building Exterior Cleaning - Rugby (CV21 1QH)
We cleaned and treated the entire external estate of a commercial site in Rugby (CV21 1QH) in early July 2026. The three-day job covered the staff and visitor car park, the lorry area, the paths and the yard, and then the cladding and windows on the building itself. Four different surfaces were refreshed: block paving, tarmac, concrete and resin-bound aggregate. Each of them calls for a specific approach, and that’s why this page focuses more on method than most.
Project Overview
- Client: Commercial premises, Rugby (CV21 1QH)
- Date: 3-5 July 2026 (three days on site)
- Scope: Car park and lorry area - block paving, tarmac, concrete and resin surfaces; brick boundary walls; building exterior - metal cladding, windows, canopy soffit
- Method: Three steps. We started by applying a sodium hypochlorite soft wash to kill biological growth and have continued with pressure washing using a rotary surface cleaner and lance. In the last step, we applied a DDAC biocide treatment on the concrete areas to inhibit algae growth for a long time.
- Documentation: We took photos from the ground and drone aerials of the yard mid-clean
What we walked into
The car park was as dirty as one can be after not being cleaned for years, not months. Heavy algae and moss were spread across the herringbone block paving, biofilm on the concrete, and green staining ran down the tarmac bays. In places, growth covered the pedestrian crossing markings, so they weren’t visible anymore. The same coating, compacted by traffic, covered the lorry area and the building looked neglected as well. Green algae coated the metal cladding, the windows were dirty, and the buff brick was weathered at the base. The entire place had a worn, unsightly appearance.
Based on our assessment, we informed the client that nothing was, in fact, broken. The site didn’t require any resurfacing, repainting, or replacement. A good, thorough cleaning was the only thing it needed.
Why three steps, not one
For cleaning results lasting a season, blasting algae off a surface with pressure alone is enough, but the algae will return as it doesn’t die underneath. That’s why we work in sequence.
- Soft wash. First, we use sodium hypochlorite to break down every surface. The bleach doesn’t just shave the green off the top but kills the algae, moss and biofilm at the root. See how this stage in progress looks in the evening photos: it’s the white foam haze on the concrete.
- Pressure wash. The second step was to use a rotary surface cleaner across the open runs of paving and tarmac. It ensured even coverage without lance stripes. For edges, kerbs, drainage channels, and the brick walls, the lance itself was used. In several photos, you can see the contrast line running across a bay, with a freshly cleaned surface on one side and an untreated surface on the other.
- Biocide treatment. We followed cleaning with a DDAC on concrete areas. DDAC is a residual disinfectant that inhibits regrowth, so the clean doesn’t last one season but several years.
Using the right pressure, we ran the same sequence on the resin-bound areas. We don’t treat resin like concrete - it would scatter. After all, the client paid for that sparkle in the aggregate when it was laid.
The building, thrown in
The grounds turned out pretty well, and we also cleaned the exterior of the building. Working from ground level, panel by panel, we used a water-fed pole to wash down the corrugated metal cladding up to the roofline. For rinsing the windows, we used pure water. We washed the canopy soffit and the louvred sections overhead, and pressure washed the buff brick plinth and red brick boundary walls along their base. A clean car park in front of a green-streaked building is a sore sight and a job half-done.
Results
- Across the car park and lorry area, we restored the original surface colour of the block paving, tarmac, concrete and resin areas and made the bay markings and the pedestrian crossing visible again.
- We didn’t just do a cosmetic clean of concrete areas but treated them with DDAC for long-term algae resistance.
- To match the refreshed grounds, we washed the cladding, windows, soffit and brickwork.
- Mid-clean, the drone aerials show the difference between half the yard still dark and half already restored to its original colour, with the line moving as our work continued.
- After we cleaned everything, the site looked revived and very smart - as the client noted. See the photos that back it up.
Project photos
Click any image to open the full frame.
Car park and paving
Facade and windows
Cladding
Brickwork
Drone survey
Got a car park that’s gone green?
Large outdoor surfaces don’t need replacing as often as many people think. Typically, there’s growth that has to be killed, the surface cleaned, and the concrete protected. And that’s the right order to do it, too. We’ll tell you exactly what your surfaces need once you send us a couple of photos and the postcode. If necessary, commercial quotes include a free drone survey. Call 07307 358765.
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