Bristol & Bath Exterior Solutions

Exterior cleaning across Portishead, Clevedon & Nailsea

Last updated: 2026-05-21 · Founder-led · £5m insured · 7-day rework

£5m Public LiabilityEA Upper-Tier Waste Carrier7-day rework guaranteeOwner-operatedBS20, BS21, BS48, BS41

Salt-air specialists for the North Somerset coastal and commuter belt. From the K-Rend terraces of Portishead Marina to the Victorian sea-front of Clevedon, the new-build estates of Nailsea, and the conservation lanes of Long Ashton and Backwell. The coast is not an inland job. We treat it accordingly.

Do you cover Portishead, Clevedon and Nailsea?

Yes, all four postcodes. Portishead (BS20), Clevedon (BS21), Nailsea and Backwell (BS48) and Long Ashton (BS41) are core territory and we route work across all of them weekly. Marina-grade K-Rend soft wash is the headline job in BS20. Conservation-aware soft wash on Victorian render and cast-iron gutter clearance dominates BS21. Nailsea runs as a high-volume new-build maintenance patch. Long Ashton and Backwell get the same low-pressure, biocide-led care we use on listed work.

The coastal problem nobody warns you about

If you live within five miles of the Severn Estuary, your house is weathering faster than the postcode lottery suggests. Salt-laden onshore air does not just look tired. It accelerates biofilm colonisation, crusts window frames with chloride deposits, and binds airborne particulate into render pores at roughly twice the rate seen in central Bristol.

We have cleaned the same K-Rend elevation in Portishead Marina that an inland Bath property would only need every 24 months. On the coast, it had bloomed back in 12 to 18. Clevedon's Victorian terraces add a second wrinkle. Soft Pennant, lime mortars and cast-iron rainwater goods that will not tolerate the high-pressure cowboy approach. We work to the coast, not against it.

Neighbourhoods we cover

Portishead (BS20)

Two towns in one. The Marina and Port Marine developments are dense with silicone-modified render systems, predominantly K-Rend, Weber and Parex, applied across the late-2000s to mid-2010s wave of new-build. Old Portishead, the Victorian and Edwardian stock around High Street, Woodhill and the Lake Grounds, is a different brief entirely. Render on solid wall. Painted brickwork. Original stone copings. Slate or clay-tile roofs with lichen blooms. Sea-front properties on Esplanade Road, Beach Hill and the Lake Grounds get the brunt of westerly weather.

Clevedon (BS21)

One of the best-preserved Victorian seaside resorts in England. A sizeable proportion of the housing stock was put up between 1850 and 1910. Hill Road, The Beach, Marine Hill, Wellington Terrace and the streets surrounding the Pier are a conservation-grade environment with painted render, lime-mortared brickwork, cast-iron downpipes and original sash joinery. Our default here is soft wash, low-pressure delivery of biocidal solution, dwell, controlled rinse. The newer estates around Castle Road, Court Road and Yeo Way get treated more conventionally, but always with respect for the iron rainwater goods that come with the territory.

Nailsea (BS48)

Overwhelmingly post-war and post-2000 new-build. Trendlewood. West End. Engine Lane. The Backwell Lake corridor. A high proportion of rendered, part-rendered and brick-and-render hybrid elevations. Driveways are typically block paving or imprinted concrete. Roofs are concrete-tile interlocking with the moss colonisation that comes as standard on a north-facing pitch. High-volume, fast-turnaround patchwork for us, and the maintenance-plan economics make particular sense here because of how uniform the housing stock is.

Long Ashton (BS41) & Backwell (BS48)

Long Ashton sits just outside the Bristol boundary on the A370 corridor. A desirable commuter village with a mix of period stone cottages, 1930s suburban, and high-spec contemporary infill. Natural-stone elevations that need lichen and biofilm removal without bleaching the substrate. Backwell, particularly Church Lane, Backwell Hill Road and the Farleigh Road area, is conservation-sensitive village stock. We approach Backwell like Long Ashton, low-pressure where possible, careful product selection, and zero shortcuts on the runoff control that the lanes and verges demand.

Coastal weathering: why your render goes green so fast

The honest version. Inland Bristol render typically blooms back to a visible level of Gloeocapsa magma and related cyanobacteria on a 24-month cycle. On the North Somerset coast, Portishead Marina, Clevedon sea-front, the Yeo Estuary edge of Nailsea, that cycle compresses to 12 to 18 months. Three forces are doing the work.

Salt aerosol sits hygroscopically on render pores, holding moisture for longer and giving algae and lichen a wetter substrate to colonise. Westerly wind-driven rain keeps north and west elevations damp for days at a time, especially through autumn and winter. And reduced UV reset on shaded elevations means colonies are not being knocked back by summer sun the way they are inland.

This is why we push annual or 18-monthly maintenance plans harder on the coast than anywhere else in our patch. The economics are simple. A maintained render holds its value, the bloom never establishes deep root structure, and the per-visit cost halves once we are not doing remedial work every visit. It is genuinely cheaper to keep a coastal render clean than to let it bloom and then restore it.

Portishead Marina K-Rend: the job we are known for

If you live on Newfoundland Way, Newhaven Road, Albion Drive, Portbury Wharf, Welton Vale or any of the marina-adjacent crescents, your home is almost certainly clad in silicone-enhanced through-coloured render. Most commonly K-Rend, but also Weber Pral M, Parex and a handful of Sto systems. These were specified as self-cleaning. They are not. They are low-maintenance in a Bedfordshire suburb. On a Severn Estuary marina with 24-hour onshore aerosol exposure, they need specialist soft-wash treatment on an 18-month cycle, minimum.

We use a proper render-safe biocide system, applied at low pressure, dwelled to kill the biological colony at root, then controlled-rinsed. No high-pressure jetting on K-Rend, ever. That is how you blow the silicone face off and turn a £40k render bill into an insurance claim. We have cleaned hundreds of marina-side elevations and we know which products and which dwell times work in a chloride-rich environment.

Clevedon Victorian: soft wash, period gutters, ironwork stains

Clevedon's period stock has three exterior problems that turn up on every survey. Painted render and lime-mortared brickwork that needs gentle, pressure-controlled treatment and biocide selection that will not strip historic paint or attack mortar joints. Cast-iron rainwater goods, original Victorian downpipes and ogee gutters that need clearing without being levered off the brackets, and that often present rust-bloom run-stains down the elevation. Pennant stone plinths, copings and steps that discolour with biofilm and lichen and which absolutely must not be cleaned with anything that could spall the surface.

Our default Clevedon spec. Soft-wash the elevations. Hand-clear and flush the iron gutters. Treat the lichen on stonework with a controlled biocide. Finish with a deep clean of any block-paved or stone driveway. We carry the right ladders, the right access kit and the right insurance for working on a four-storey Marine Hill terrace without dropping a downpipe in someone's bay window.

Property types we work on most weeks

Service mix across North Somerset

Nearby areas we cover

FAQs from the North Somerset coast

Why does my render get dirty so fast on the coast?

Salt-laden marine aerosol holds moisture in your render pores for longer than inland air does, which gives algae and biofilm a wetter, more hospitable substrate to colonise. Combined with prevailing westerly wind-driven rain and reduced UV exposure on shaded elevations, this typically halves the time between visible blooms, from a 24-month cycle inland to 12 to 18 months on the coast. It is not a defect in your render. It is the climate. The fix is a proper maintenance schedule rather than a one-off blitz every five years.

Can you do my marina-side K-Rend in Portishead?

Yes. It is the job we are best known for in BS20. We use a soft-wash, low-pressure, biocide-led system specifically designed for silicone-enhanced through-coloured renders like K-Rend, Weber Pral M and Parex. No high-pressure jetting on the render face. We carry £5m public liability, we are EA Upper-Tier Waste Carrier registered, and we offer a 7-day rework guarantee on every render clean.

Do you cover Clevedon?

Yes. Across BS21 in full, including the conservation-area streets around the Pier, Hill Road, Marine Hill and the Beach. We default to soft wash on Victorian and Edwardian properties, hand-clear cast-iron rainwater goods, and select biocides that will not strip period paintwork or attack lime-pointed brickwork. If your property is listed or sits in a conservation area, we factor that into the survey from the first call.

Do you offer salt-air maintenance plans?

Yes, and we recommend them more strongly on the coast than anywhere else in our service area. Plans typically run on a 12 or 18-month cycle depending on elevation exposure, and the per-visit cost is materially lower than one-off remedial cleans because the bloom never establishes deep root structure. Most plans pay for themselves within the second cycle.

What about Long Ashton conservation considerations?

Long Ashton has a number of locally listed buildings and conservation-sensitive lanes, particularly around the church, Long Ashton Road and the older parts of the village. We work to a low-pressure, biocide-led specification on stone, render and period brickwork, control runoff carefully on the verges and unmade lanes, and we will happily liaise with the parish council or conservation officer if your project requires it. Same standard of care extends to Backwell village.

Book your coastal exterior clean

Coastal-grade exterior cleaning across Portishead, Clevedon, Nailsea, Long Ashton and Backwell. Free no-obligation survey, same working day response.

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