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Driven by environmental concerns relating to construction, Lime Mortars are becoming increasingly accepted in New
Build.
Environmentally friendly Lime binders require significantly lower energy to produce and give off much
lower CO2 emissions than Portland cement. They are an excellent bedding mortar for use with reclaimed bricks and
natural stone masonry, are aesthetically very pleasing and work in harmony with breathing wall technology.
However, when specifying lime mortars for new build, particularly where thin wall (half brick thick or cavity)
construction it must be bourne in mind that Lime mortars take longer to set initially than cement mixes, although
this should have little or no impact on the rate of build, consideration of wind loads on freshly built walls and
the impact of slower hardening around wall ties has to be accommodated. Mortars made with natural hydraulic limes
that stiffen and harden faster, reduce the risk of wall tie failure, others are more suitable for thicker wall
construction where wall tie dependency is not so important.
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