Barry property owners come to us when a modern finish has failed. Cement render and gypsum plaster trap moisture inside local rubble stone and slate, and in some of the highest rainfall and wind-driven damp in Britain that shows up as damp patches, salt blooming and rotting timbers. We put it right with breathable lime across South Glamorgan.
Exposure matters as much as material. Barry sits in some of the highest rainfall and wind-driven damp in Britain, which means external work has to shed water and then dry out again quickly. That is exactly what a correctly built lime render does, and exactly what a sealed cement skin prevents.
Around Barry you will find stone longhouses alongside later Victorian chapel-era terraces. Both were built with lime, and both suffer when a modern impermeable finish is applied over the top — the moisture has to go somewhere, and it goes into the masonry and the timbers.
Lime is flexible, breathable and self-healing. On Barry properties built from local rubble stone and slate, it moves with the building instead of cracking away from it, and it protects the masonry rather than the other way round.
Every Barry job begins with diagnosis: identifying where moisture is entering before any plaster goes on. We then remove failed material, prepare the local rubble stone and slate, and build the lime up in coats, allowing each one to cure before the next.
Because thick random rubble walls with earth cores must be able to breathe, Barry throws up a particular set of problems. These are representative examples of how we resolve them in lime.
chapel-era terrace — Blown gypsum plaster and tide marks on the ground floor of a chapel-era terrace in South Glamorgan. We hacked off the gypsum, applied a haired lime base coat and a lime putty finish, and specified clay paint so the wall could keep drying.
clom-walled smallholding — A commercial clom-walled smallholding on a Barry high street within a conservation area. Decayed render and mouldings were reinstated in lime, run in situ to the original profiles, and finished to match neighbouring frontages.
stone longhouse — A stone longhouse being brought back into use outside Barry. Because thick random rubble walls with earth cores must be able to breathe, we plastered internally in lime over a breathable insulating background and left the external stonework repointed rather than sealed.
Send us the details of your Barry property through the contact form and we will arrange a free survey. You will receive a written specification and quote with no obligation to proceed.
Where damp is caused by trapped moisture in a solid wall — very common in older Barry properties — replacing cement or gypsum with lime allows the wall to dry out. We always identify the source of moisture during the survey before recommending work.
Yes, but it must be finished with a breathable product such as limewash, clay paint or mineral silicate paint. We advise on suitable finishes for each Barry project so breathability is not lost at the final coat.
It depends on the wall and its exposure. For most South Glamorgan work we use hot-mixed lime, often finished as roughcast or limewashed for weather protection, stepping up to a more hydraulic lime only where exposure or the substrate genuinely demands it.
Yes — stripping failed cement render and replacing it with a breathable lime render is one of the most common jobs we carry out in Barry. It is usually the fastest way to resolve persistent damp in a solid-wall building.
Our lime plastering, render and pointing teams also cover these towns and cities close to Barry in South Glamorgan and the wider Wales area.
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