Damp, blown plaster and failing render are common complaints in Rhondda's older housing. Because so much of it is built from Welsh sandstone and exposed to some of the highest rainfall and wind-driven damp in Britain, the fix is nearly always breathable lime rather than another coat of cement. We deliver that work throughout Rhondda Cynon Taf.
Rhondda's building stock reflects the history of Wales, and thick random rubble walls with earth cores must be able to breathe. Applying gypsum or cement to these walls traps moisture; lime lets it evaporate freely, protecting the fabric of the building for decades.
The older parts of Rhondda are dominated by stone longhouses, slate-hung cottages, Victorian chapel-era terraces. These are solid-wall constructions — there is no cavity, no damp-proof membrane and no vapour barrier — so the wall relies on evaporation through the plaster and render to stay dry.
Lime is flexible, breathable and self-healing. On Rhondda properties built from Welsh sandstone, it moves with the building instead of cracking away from it, and it protects the masonry rather than the other way round.
You get a single point of contact from survey to final coat. We agree the specification for your Rhondda property in writing, prepare and apply the lime in the correct build-up, and advise on breathable decoration once the work has cured.
Every Rhondda property is surveyed individually, but these examples show the kind of Rhondda Cynon Taf buildings and use-cases we are called to most often.
stone longhouse — Blown gypsum plaster and tide marks on the ground floor of a stone longhouse in Rhondda Cynon Taf. 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.
chapel-era terrace — A chapel-era terrace in Rhondda where a cement plinth was holding water in the base of the wall. We removed the plinth, lowered adjacent ground levels, and re-rendered the base in a sacrificial lime coat designed to be renewed periodically.
Victorian quarry-town house — A Victorian quarry-town house in Rhondda where hard cement render had trapped moisture against local rubble stone and slate. We stripped the render back to bare wall, allowed the masonry to dry, then rebuilt the finish in three coats of lime and limewashed it.
External lime work is best carried out between spring and early autumn so it can carbonate before the first frosts. Internal lime plastering in Rhondda can be done year-round with adequate heating and ventilation.
Lime cures slowly by carbonation. Allow roughly a week per coat as a guide, and longer in some of the highest rainfall and wind-driven damp in Britain. We protect the work and control drying so the finish cures evenly rather than cracking or dusting.
Yes — stripping failed cement render and replacing it with a breathable lime render is one of the most common jobs we carry out in Rhondda. It is usually the fastest way to resolve persistent damp in a solid-wall building.
Send us the details of your Rhondda 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 Rhondda 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.
Our lime plastering, render and pointing teams also cover these towns and cities close to Rhondda in Rhondda Cynon Taf and the wider Wales area.
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