Sympathetically conserve and restore
Quadriga stone restoration services will sympathetically conserve and restore masonry, preventing further deterioration. As well as structural safety, we restore the aesthetic appearance of the building, from offices and shopping centres to heritage landmarks and monuments.
Common causes of stone masonry failure include incompatible materials being placed beside one another, inadequate weathering protection, and poor quality masonry repairs. The use of hand mortars in re-pointing is a common cause for stone deterioration.
External stonework often requires stone cleaning in order to adequately identify concealed defects. Once diagnosed, various methods can be adopted depending upon the type of stone masonry and the extent of the decay.
Masonry restoration techniques
Stone restoration and repair options are broadly the same as those used for other types of masonry, and include complete renewal, in situ surface restoration, or consolidation.
If an area of stonework is defective and needs to be replaced, new pieces of carefully matched masonry can be indented into an existing structure to replace defective areas of stonework.
A defective area of masonry can be cut out and repaired using restoration mortar. The area of repair is dampened and stainless steel dowels are fixed into the host area of repair if required, before the area is restored forward with mortar to its original line and profile.
Masonry consolidation is ideal for areas of unstable or loose stonework. Grout is pumped into the unstable masonry structure to bind the masonry together while producing what is in effect an invisible repair. Pinning can be used to fix loose pieces of masonry to the main structure and improve the stability of the substrate. Stainless steel dowels are drilled into the stonework and fixed in place with epoxy resin.