Traditional stone masonry
We have the skills and ability to develop and deliver traditional masonry detailed architectural proposals, from conception through to completion.
The principal British Standard that provides industry guidance for the use of natural stone as a cladding material is BS8298 (Part 2) 2020.
The basis of this type of cladding design is such that the cladding is built to provide support at each floor or alternative floor level through support brackets (corbels), secured back the primary structure concrete floor slab edge or structural steel perimeter beam, restrained to the inner wall frame. This is normally SFS framing faced with cement particle board, blockwork, or concrete wall elements. All support and restraint fixings are specified as an appropriate grade of stainless steel to suit the local environment.
Each course of stone is bedded and jointed with a hydraulic lime-based mortar mix being locked together with stainless steel restraint ties and dowels, pointed with a complimentary pointing mix thus providing a securely fixed façade.
Appropriate movement and compression bed joints are designed to ensure the deadweight of the cladding is transferred back to the structure. This is in line with the agreed load path, whilst being able to accommodate both wind loading and thermal movement from the cladding itself, designed in long- and short-term structural movement of the primary frame of the building.
Early specialist advice is recommended – contact PMJ Masonry to discuss your needs further.