R C Stoneworks are experts at re-pointing. Very often historic and listed buildings have been badly re-pointed over the years using cement mortar. This is the worst possible thing for stone buildings, trapping moisture inside the building and not allowing any kind of movement also in some cases leaching into delicate stonework.
We are highly skilled at sympathetically removing cement mortar generally by using hand tools only, however, some very hard mortar will need some means of mechanical removal. We generally rake out joints to a minimum of 30mm (or however specified by the architect).
All stonework and joints are cut back, cleaned and squared thoroughly removing all debris and dust. All joints are thoroughly soaked with water, this allows the new material to bond nicely.
The clean raked out joints are then repacked with lime mortar, colour matched to suit any other pointing on the building. generally using a local sand (or a specific mix specified by architect or customer).
Samples can be provided before work commences to ensure complete customer satisfaction