NATURAL HYDRAULIC LIME


Grades from 0 up to 4mm are supplied in pre-bagged grouts and pointing mortars. UK blended lime mortars, with limestone aggregates are also available. Pressure pointing and grouting has been tested and been most successful with gravity flow also an option.


Brick Mesh


Mesh reinforcement is an option for deteriorated backgrounds. Telling supply ‘Brick Mesh’, as stainless steel wire coated with nodules of clay to ensure fusion of lime to the natural mineral. Substrates that are cracked or suffering from high levels of movement are suitable for ‘Brick Lathe’ applications as well as timber backgrounds or as an application over insulation slabs. Moulding or pre-shaping the mesh to match existing profiles before running the plaster to form cornices, bands etc., is a cost effective method of use.


Flooring


It is a commonly held belief that concrete and wearing screeds can only be created with cementitious materials. This is not the case as the selection of binder, aggregate grading and mix ratio enable the creation of ‘lime concrete, Unilit floor screeds, stone, tile and flags bedding and pointing and in conjunction with insulation and under floor heating systems.


Natural hydraulic lime allows the application of slabs and floor screeds in large areas without the requirement for expansion or slip joints. These prevent differential movement between the floor screed and the walls of lime built buildings. Application without a DPM will allow the floor to “breathe” with moisture from beneath the screed is evacuated as a vapour preventing the build up of a hydrostatic pressure within the floor with the subsequent diversion of salt laden water into the walls. Where stone, paving or tiles are laid over the screed the use of a Unilit bedding mortar will ensure the performance of the screed is maintained and the compatibility of the mortar with the stone.


The application of a hydraulic lime screed complements the application of Unilit 30 waterproofing and stabilising plaster to basement walls and up to 1 metre above ground level.


Unilit screeds can be applied over insulation boards and in conjunction with underfloor heating. The enhanced stability, open pore structure and extremely low coefficient of thermal expansion of hydraulic lime mortars prevents the build up of moisture within the floor, removes the risk of thermal movement, and produces an improved storage of heat within the floor when compared to cementitious screeds.


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