The accumulation of excess moisture behind the weathering layers of a mortar, paint or decorative coating and the subsequent evaporation lead to the build up of hygroscopic salts deposits. These cause degradation of decoration and deterioration of the building fabric. To seek a cure by mechanical extraction or synthetic overcoating is to neglect to tackle the cause of initial dampness. Natural hydraulic lime provides a vital link between the needs of a modern day specifier and those of a conservator. It does not deteriorate due to the presence of humidity or moisture in the substrate, in fact its performance is


enhanced by these to promote the initial set. Due to careful slaking during production Unilit does not suffer from the leeching of free lime caused by early exposure to excess moisture. The product Unilit 30 can be utilised in salts containment applications such as in cellars and against rising damp as well as for the protection of highly exposed surfaces at roof level such as chimneys. The unique formulation of this product ensures optimum stabilisation along with salts control.


Stabilisation and Consolidation Grouts


Unilit Natural Hydraulic lime is ideally formulated for the maintenance of the fabric of the historic infrastructure of the UK’s transport system. Consolidation of existing structures is increasingly called for in preserving tunnels, canal locks and bridges. It is also increasingly called for where the fabric of a building has been undermined by flooding. Several European testing authorities have been undertaking studies to increase awareness in this diverse field. Using consolidation to stabilise or rejuvenate weakened structures must take account of the physical and mechanical properties of the original construction. Ease of application and compatible materials of comparable strength are found in the Unilit B Fluid X range of grouts and mortars. Injection grouts enable the equilibrium of the physical properties to be retained without detrimental effect upon the structural components. The success of injection lies in the ability to stabilise the mass without risk of causing structural stress or cracking which can occur by using mediums that are stronger than the elements they are bonding. The characteristics of vapour permeability, mechanical resistance, excellent flow and low salts content of Unilit lime grouts ensure the repairs will maintain the fundamental performance of the structure.


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