Carmarthenshire · SA18
Mining-era terraces and hillside semis in the Amman Valley take a lot of rain. We repair cracked and loose pebble dash before it lets the damp in.
Ammanford sits where the Amman Valley opens out, with the Black Mountain rising to the north-east. That means a lot of rain, cold winter nights and houses that need a good coat on the outside. Pebble dash has been that coat for generations of valley homes. It is tough and low maintenance, but it does not last for ever, and once it starts to crack the valley weather finds every gap.
We repair pebble dash across Ammanford and the nearby villages, including Betws, Llandybie, Tycroes, Glanaman and Garnant. We fix cracks, patch hollow sections, re-dash failing walls and clean off algae and moss. For houses where the dash is beyond saving or you want a change, we can discuss removal or rendering over it.
Every quote is based on what we find on the wall, explained in plain language.
Ammanford grew quickly with the anthracite collieries of the Amman Valley, and the town and its neighbouring villages are full of stone and brick terraces built for mining families. Many of these have since been dashed or rendered, often to deal with damp coming through old solid walls. Alongside them are inter-war and post-war council estates and private semis, many dashed when they were built, and bungalows on the edges of town.
The weather here is different from the coast. It is wetter, and the hills hold cloud and rain for longer. Winter nights get properly cold, so freeze–thaw damage is a common cause of failure. Houses on the valley sides, especially around Betws and the upper parts of Glanaman and Garnant, are exposed to wind-driven rain, while those in sheltered spots can stay damp and grow moss and algae.
On older terraces the main concern is breathability. Dense cement dash or plastic paint over a solid stone wall can trap moisture inside, which shows up as damp patches indoors. Where we find that, we discuss breathable alternatives. On later houses, the usual problems are cracking around openings and hollow areas where the dash has lost its bond. Either way, we look at why the wall failed before deciding how to repair it.
Some Ammanford owners would like to see the stone of their house again. Pebble dash removal is possible, but the stone may have been hacked or patched before it was dashed, so we always test a small area first. More often, careful crack repairs and a breathable coating, or a full re-dash, give a better and longer-lasting result.
Good to know
Water gets into fine cracks and the back of the render, then freezes and expands. Each cold snap pushes it further from the wall. In the Amman Valley, with its cold nights, this is the most common cause of failure. We cut back to sound render and seal properly to stop it happening again.
It can if the dash or paint over it does not let moisture escape. Old solid stone walls need to breathe. If hard cement dash is trapping damp, we can discuss replacing it with breathable materials. We always look for other causes too, such as leaking gutters or high ground levels.
Sometimes. It depends on the condition of the stone, which may have been damaged or patched before dashing. We test a small area first so you can see what lies underneath. If the stone is poor, re-dashing or a breathable render may be the better choice.
Yes. We use adjustable scaffold bases to level up on sloping ground and plan access around parked cars and narrow lanes. We will look at your street during the survey and arrange any council permits needed for scaffold on the pavement.
Late spring to early autumn is usually best. Render needs dry weather and temperatures above about 5°C to cure, and the valley can be colder and wetter than the coast. We avoid frosty mornings and wet spells, and cover fresh work if rain is forecast.
Services
Every service below is available in Ammanford and the surrounding area. Tap one for the full details.
We begin by walking round the house and tapping the dash to find hollow areas. We also look at gutters, downpipes, sills and the ground around the walls, as water problems are often the root cause. If you have damp inside, we will ask to see it. You get a written quote setting out the work. Before starting, we show you aggregate samples against the wall, organise scaffold and parking, and choose a dry, mild spell. New work is protected while it cures, and we tidy away all debris at the end. Ring 07565 147 170 or send the website form to book your survey.
Reviews
Reviews from local customers will appear here.
Had a job done by us? Leave a review — it only takes a minute.
Case studies
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 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 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
Cost depends on the area of dash affected, how much is hollow underneath, scaffold and access on sloping streets, the aggregate needed and any extra work such as cleaning or painting. Stone walls with old repairs can take longer to prepare. We give a written quote after a free survey.
We compare samples of available aggregate against your wall and choose the closest. Weathered dash is not always possible to match exactly, but we get it as close as we can. New work may look slightly fresher at first and usually tones in over time.
Yes, we cover Ammanford and the villages up and down the Amman Valley, plus Llandybie, Tycroes and Cross Hands. The housing and weather are similar along the valley, so we take the same careful approach to each job.
Only if the paint is breathable and the dash beneath is sound. Non-breathable paint can make damp worse on older walls. We repair cracks and hollow areas first, then use vapour-permeable masonry coatings that keep rain out while letting moisture escape.
Re-rendering a large part of a wall may mean Building Regulations require insulation improvements. Small repairs usually do not. We recommend checking with Carmarthenshire County Council's building control before major re-dashing, and listed buildings may need separate consent.
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.