Stone & Brick Repointing Services London
City Stone UK make customer centred recommendations that are both physically and aesthetically compatible with the building entirety or the facade work. We undertake all types of brick and stone repointing and repair work to private properties and commercial buildings as the principal specialist. This can be as part of the stone cleaning and restoration project or independently. We can also carry out patch pointing to match existing, (only placed that need pointing.) Typically within a project, the stone or brick cleaning process should be carried out first, then followed by repointing, restoration and painting, if applicable. New window installations should always be last.
As the building ages, the mortar needs replacing and this is the purpose of repointing between the bricks or stone. Brick and stonework gradually disintegrate over time, the rain gets in between the remaining bricks or stone causing cracks and expansion. This erodes the joints to a deeper scale if left, and will have a significant impact on the building, particularly with old buildings. There may be a case for brick or stone restoration for certain projects and buildings.
Lime Mortar Repointing
In the early part of the 20th century, mortar was mixed with lime and sand to make lime putty. When many old buildings were constructed, mortar typically consisted of high lime content, but during the second half of the 20th century, Portland cement and ground limestone was used for replacement mortar.
Stone Pointing Styles
There are three types of recessed mortar: bucket handle, weather struck and simply recessed. The bucket handle is when the mortar is in a curve shape away from the face of the brick. Weatherstruck is when the mortar starts close to the bottom brick and recesses back as it goes up towards the upper brick. The third, recessed, is when the mortar sits back from the face of the brick. There is also tuckpointing when there are two types of mortar used and the surface one matches the colour of the masonry. A wall is constructed from either brick or stone, and the joints are filled with mortar which helps protect the wall from the elements.
To remove hard pointing such as Portland cement, we would use a power circular masonry blade, for softer mortar such as lime mortar or terracotta. This would be carefully carried out by hand to remove the old joint and then fresh mortar applied for the application of the mortar between and around the joints as they are set into place. Great care is given not to damage the surrounding stone. We pay particular attention to the window area as if it is not completed correctly, disturbing mortar around the window can cause problems with the fit and closure of the window. Once there is an adequate gap to hold the new mortar, this is then carefully applied by our skilled craftspeople.
Batches of mortar are calculated and mixed at the same time so there is no inconsistency with the colour. Custom colour matching is vital to achieving perfection, especially when it is recognised that two buildings made of the same stone can still differ in colour and texture dependent on time, pollutants and weather. A sample from the existing can be extracted for colour matching the pigmentation.
City Stone UK can provide a guide price ‘per square meter’, having carried out a sample area on site. The cost of repointing work will vary depending on the areas to be repointed and the type of building. Some buildings are more complicated and time-consuming than others, so subsequently they require more attention. If you are looking for any repointing work, contact us today and book in an appointment for a quotation where we can visit your property and carry out a thorough evaluation of the stone masonry or brick pointing to be complete.