Main Use: Window sills, Flooring, Facade
Bath Stone is an oolitic limestone comprising granular fragments of calcium carbonate. Originally obtained from the Combe Down and Bathampton Down Mines under Combe Down, Somerset, England, its warm, honey colouring gives the World Heritage City of Bath, England its distinctive appearance. An important feature of Bath Stone is that it is a 'freestone', so-called because it can be sawn or 'squared up' in any direction, unlike other rocks such as slate, which forms distinct layers.
Some quarries are still in use, but the majority have been either converted to other purposes or are being filled in.
Bath Stone has been used extensively as a building material throughout southern England, for churches, houses, and public buildings such as railway stations.
Main use: Paving, Steps, Flooring
Yorkstone is a term for a variety of sandstone, specifically from quarries in Yorkshire that have been worked since mediaeval times, but now applied generally. Yorkstone is a tight grained, Carboniferous sedimentary rock. The stone consists of quartz, mica, feldspar, clay and iron oxides.
Known for its hard wearing and durable qualities Yorkstone has been used in a wide array of building, construction and landscaping applications around the world for many years. In Yorkshire, split stones called thackstone (Scots thack, English thatch) were employed as roofing. The traditional London paving stone has been made of York stone.
Yorkstone is popular in both new construction and restoration. The colour of Yorkstone depends on the minerals within its makeup and differs throughout the quarries from which it is mined. Newly quarried Yorkstone is usually available as slabs for paving, setts and walling stones. Reused Yorkstone paving, salvaged from demolished sites, is valued for its naturally weathered surfaces.
Main Use: Cladding, Walls, Flooring
Portland stone is a limestone from the Tithonian stage of the Jurassic period quarried on the Isle of Portland, Dorset. The quarries consist of beds of white-grey limestone separated by chert beds. It has been used extensively as a building stone throughout the British Isles, notably in major public buildings in London such as St Paul's Cathedral and Buckingham Palace. It is also exported to many countries—Portland stone is used in the United Nations headquarters building in New York City, for example.
Portland Stone Wall:
We also work with other British Sand and Lime stones as well as Marble, Granite and Slate. Please enquire for more details.
Hydraulic Lime Mortar
Hydraulic limes (so called because they set under water) are made in the same way as non-hydraulic lime but using different limestone. They are sold as hydrated lime and have an initial set when water is added, followed by hardening while they absorb carbon dioxide. The more hydraulic a lime is the faster it sets and the higher it's final strength, but the less breathable and flexible it is.
Hydraulic Lime Mortars are used for bricklaying, block laying and stone masonry work. HLM 1 mortar is typically used for internal use or for masonry work in sheltered areas and for work on soft bricks or delicate masonry, conservation and repair. HLM 2.5 mortar is used for repointing work and for masonry work in most locations. HLM 5 mortar is used for work in exposed areas such as chimneys, coping stones and canal/river work.
Non Hydraulic Lime Mortar (Lime Putty)
It’s a traditional lime mortar, it does not contain any cement. It is a composition of lime putty and aggregate. Lime putty is a non-hydraulic lime, hence the name. Non-hydraulic lime is softer and sets much more slowly. The carbonation process is very slow and the material remains soft and flexible. This of course, can be extremely advantageous if that's what is required.
This lime is often regarded as the most appropriate lime to use in the conservation of old buildings where maximum permeability is required.