Traditional lime plastering in Pontypridd and across Rhondda Cynon Taf. Working on slate-hung cottages and other solid-wall property, we specify hot-mixed lime, lime putty and natural hydraulic lime to suit each individual wall rather than applying one standard mix to everything.
Many properties in and around Pontypridd sit within conservation areas or carry listed status, so finishes must match the original construction. We work regularly with Rhondda Cynon Taf conservation officers and typically specify hot-mixed lime, often finished as roughcast or limewashed for weather protection.
Pontypridd and the villages around it retain a good deal of Welsh sandstone. Where that material is soft — as most traditional Rhondda Cynon Taf walling is — the mortar and plaster must always be softer than the masonry, so it wears sacrificially instead of eroding the stone or brick face.
Solid-wall buildings in Pontypridd were designed to absorb and release moisture. Lime keeps that cycle working; cement seals it in. That single difference explains why so many Rhondda Cynon Taf homes develop damp after a modern refurbishment.
Once the survey is agreed, we protect the site, strip back the failed finish, and apply lime in successive coats with proper curing between each. In some of the highest rainfall and wind-driven damp in Britain we control drying with damp hessian or sheeting so the work carbonates evenly rather than cracking.
The jobs below are typical of the work we carry out on Pontypridd property — the building types and problems vary, but the answer is always breathable lime rather than cement.
converted stone barn — A converted stone barn being brought back into use outside Pontypridd. 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.
Victorian quarry-town house — Weather-facing walls of a Victorian quarry-town house taking the full force of some of the highest rainfall and wind-driven damp in Britain. We specified hot-mixed lime, often finished as roughcast or limewashed for weather protection, built the render up in generous coats and protected the work while it carbonated to avoid shrinkage cracking.
slate-hung cottage — Sagging original ceilings in a slate-hung cottage near the centre of Pontypridd. Sound laths were retained and re-keyed, missing sections re-lathed in riven timber, and the ceiling made good with haired lime plaster to match the surviving profile.
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.
We do. Pontypridd is one of our core areas and we travel throughout Rhondda Cynon Taf and the surrounding parts of Wales for lime plastering, lime render, lime pointing and heritage repair.
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 Pontypridd project so breathability is not lost at the final coat.
Our lime plastering, render and pointing teams also cover these towns and cities close to Pontypridd in Rhondda Cynon Taf and the wider Wales area.
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