Swansea property owners come to us when a modern finish has failed. Cement render and gypsum plaster trap moisture inside Welsh sandstone, 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 West Glamorgan.
Damp in Swansea homes is usually caused by the wrong material rather than a faulty building. Where cement render has been applied over Welsh sandstone, stripping it back and re-rendering in lime normally resolves the damp within a single drying season.
Around Swansea 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.
In some of the highest rainfall and wind-driven damp in Britain, an impermeable render is a liability: water gets in at cracks and reveals and then cannot leave. Lime render on a Swansea wall handles that water, releasing it back out through the surface instead of pushing it deeper into the structure.
Every Swansea job begins with diagnosis: identifying where moisture is entering before any plaster goes on. We then remove failed material, prepare the Welsh sandstone, 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, Swansea 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 West 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.
converted stone barn — Eroding masonry faces on a converted stone barn in Swansea caused by hard cement pointing. We raked out by hand to the correct depth and repointed in a soft lime mortar matched to the original aggregate and colour of the local rubble stone and slate.
stone longhouse — Owners of a stone longhouse in West Glamorgan wanted warmer rooms without sealing the walls. We installed a woodfibre or cork-lime background and finished in lime plaster, improving comfort while keeping the wall vapour-open.
Yes — stripping failed cement render and replacing it with a breathable lime render is one of the most common jobs we carry out in Swansea. It is usually the fastest way to resolve persistent damp in a solid-wall building.
Where damp is caused by trapped moisture in a solid wall — very common in older Swansea 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. We regularly work on listed and conservation-area properties across West Glamorgan and can supply mix specifications and sample panels for Swansea conservation officers where consent is required.
Send us the details of your Swansea 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.
It depends on the wall and its exposure. For most West 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.
Our lime plastering, render and pointing teams also cover these towns and cities close to Swansea in West Glamorgan and the wider Wales area.
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