Swansea & Neath Port Talbot · SA1
From hillside terraces above the city to semis facing Swansea Bay, we repair cracked and blown pebble dash so your walls keep the weather out.
Swansea gets more than its share of rain, and much of it arrives sideways off the bay. Pebble dash was put on thousands of the city's houses precisely to cope with that, but it only works while it stays whole. Once a crack opens or a section comes away from the wall, water gets behind the render and the coating that was meant to protect the house starts to trap moisture against it instead.
We work across Swansea repairing pebble dash on terraces, semis, bungalows and commercial buildings. Most jobs start small: a hairline crack under a window, a bulge near a downpipe, a patch that sounds hollow when tapped. Dealt with early, those are straightforward crack repairs or patch repairs. Left for a few winters, they tend to spread, and the conversation turns to re-dashing whole elevations.
Our team brings decades of experience in home improvement and repair, and we would always rather tell you a wall needs a modest fix than sell you a bigger job it does not need.
Swansea is a city built on slopes. Streets climb steeply from the shoreline up towards Townhill, Mayhill, Penlan and Gendros, and a great many of the houses on those hillsides are inter-war and post-war council-built homes that were dashed from the start. Further out, in places like Sketty, Killay and West Cross, you find rows of 1930s and 1950s semis where pebble dash was a popular finish, often over a rendered base on solid or early cavity walls. Older Victorian terraces in areas such as St Thomas, Brynmill and the Uplands were frequently dashed later on, sometimes over brickwork that was never designed to be covered.
The weather does the rest. Houses on the higher ground take the full force of south-westerly gales, and wind-driven rain is pushed into any gap in the finish. Near the bay, salt in the air adds to the wear on paint and older render. In cold snaps, water sitting in a crack freezes, expands and levers the dash away from the wall, which is why so many Swansea repairs involve render that has gone hollow behind a surface that still looks reasonably intact.
For us, that means two things here: we always tap-test around any visible damage, because the hollow area is usually bigger than the crack suggests, and we plan work around the weather rather than rushing render on in conditions where it will not cure properly.
A lot of what we see in Swansea is the result of earlier repairs done in a hurry: a patch of grey cement smoothed over a crack, or a section re-dashed in a pebble that does not match. Where that has happened, we cut back to sound render and redo it properly, trying samples against the wall first so you can see how close the match will be. If a house has been patched so many times that it looks like a quilt, we will talk you through painting with a breathable masonry coating or rendering over the old dash instead.
Good to know
Yes. Many Swansea jobs are on sloping roads where scaffold has to be levelled with adjustable bases and parking is tight. We look at the street on the survey visit, plan where materials and a van can sit, and, if needed, arrange any permit for scaffold on the pavement before work starts.
Exposure matters. Walls facing the sea dry slowly after rain and take a lot of salt-laden wind. We pay extra attention to sealing the edges of repairs, around sills and at the base of the wall, and we avoid finishing render late in the day when sea mist is likely to settle on it overnight.
Estates in Swansea were often dashed in one go, so neighbouring houses tend to share a similar aggregate. That helps. We compare samples of locally available pebble against your wall and show you the closest options. On weathered dash an exact match is not always possible, but we get it as close as we can.
Late spring to early autumn usually gives the steadiest conditions. Render needs dry weather and temperatures above roughly 5°C to cure, and Swansea's showers can roll in quickly off the bay. We keep an eye on forecasts, cover fresh work with sheeting and will reschedule rather than render in heavy rain or frost.
We do. Flats above shops and small commercial buildings often have dash at upper levels only, which means scaffold over a pavement and working around trading hours. We can plan the work in stages to keep entrances open. Our commercial pebble dash repair page covers this in more detail.
Services
Every service below is available in Swansea and the surrounding area. Tap one for the full details.
We start by walking round the outside and tapping the dash with a small hammer to map any hollow areas, not just the cracks you can see. We check sills, flashings and gutters, because a leaking downpipe is often the real cause of the damage. You then get a clear written quote that sets out what we found and what we recommend. Before work begins we bring aggregate samples to hold against the wall, agree where scaffold and materials will go on the street, and book the job for a dry spell. When we finish, we clear away debris and wash down paths and windows. To arrange a visit, call 07565 147 170 or send us the enquiry form.
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Case studies
A terraced house facing Swansea Bay with hollow render across most of the front. Patching would not have lasted, so we stripped and re-dashed the elevation to match neighbours.
Typical job exampleRead the case study
A painted 1930s semi with cracks running from the front window corners and a damp patch inside. We traced the cause, repaired the cracks and repainted the front elevation.
Typical job exampleRead the case study
A post-war semi with several blown areas around pipes and below sills. We patched them using a blend of aggregates sampled to match the existing natural dash.
Typical job exampleRead the case studyFAQs
It depends on the size of the damaged area, how much render is hollow behind it, whether scaffold is needed, and how hard the aggregate is to match. Access on steep roads can add time. We give a fixed written quote after a free survey, so you know the full cost before any work starts.
We aim for the closest match we can, sourcing pebble in a similar size and colour and showing you samples first. Old dash fades and collects dirt, so new stones can look brighter at first. They usually tone in over time, and cleaning the surrounding wall can help the repair blend sooner.
It can be tempting, but a crack lets rain in every time it pours, and Swansea winters bring plenty of freeze and thaw. That is what turns a fine crack into a loose, bulging patch. Repairing it while it is small is quicker, cheaper and less disruptive than replacing a large section later.
Like-for-like repairs usually do not need consent, but listed buildings and some conservation areas may. If you are re-rendering a large part of a wall, Building Regulations may also require thermal upgrades. We recommend checking with Swansea Council's planning and building control teams before major work.
Almost never. Pebble dash work is external. We may ask to check an inside wall if there are damp patches, as that helps us understand where water is getting in. Otherwise we just need access around the outside and somewhere to park and store materials.
From the blog
Preparing for a Pebble Dash Job: Scaffolding, Neighbours and TimingA little planning makes any pebble dash job run more smoothly. Here is what to expect with scaffolding, neighbours, permissions and the weather.Read more 
Why Pebble Dash Cracks in Welsh WeatherRain blown in off the Atlantic, frost on the hills and salt on the coast all test pebble dash. Here is how weather causes cracking, and how to slow it down.Read more 
Can You Paint Pebble Dash? What to Know Before You StartPainting can transform tired pebble dash, but it is a long-term commitment. Here is what to consider, how to prepare and which coatings suit Welsh walls.Read more 
Repair, Re-Dash or Render? Choosing the Right Option for Your WallPatching, re-dashing and re-rendering all have their place. This guide explains when each makes sense, what they involve and the questions to ask before deciding.Read more 
Cleaning Pebble Dash Safely: Why Soft-Washing Beats the Jet WasherAlgae and moss love damp Welsh walls. Here is how to clean pebble dash without blasting the stones off, and how to slow down the green coming back.Read more 
How to Tell If Your Pebble Dash Needs RepairingA walk round the outside of your house can tell you a lot. Here are the simple checks that show whether pebble dash is sound or starting to fail.Read more Free survey and a clear written quote anywhere in South & West Wales.