Hydraulic Lime Mortars for New Builds
Using hydraulic lime mortars in new builds makes a lot of sense.
Low cost considerations associated with cement mortars do not add up when the environmental and long term durability benefits of lime mortars are considered.
The life of a lime mortar properly applied can be much longer than a cement mortar.
The dense and brittle nature of cement mortars causes retention of condensation, dampness, joint delamination and poor materials recyclability. There is little or no CO2 reabsorption in cement mortars and high embodied energy.
Mortars high in cement clinker are to be avoided for these reasons:
Non re-cycling of masonry units
Very poor vapour exchange
High shrinkage = cracking
High embodied energy
- High thermal movement
The environmental benefits of hydraulic lime mortars is one of the main reasons for the increased interest and attraction for using lime green's lime mortars, lime plasters and lime renders in new builds.
High compressive strengths and quick setting should not be the only requirements in new build mortars. Other characteristics are as important for environmental and lasting performance.
Lime Green use Natural Hydraulic Lime Mortars for a number of reasons;
Good vapour permeability
- Low shrinkage
Technical help and expertise
If you need further advice or information about hydraulic lime mortars, we offer an in-depth technical advice for the use of lime mortars, lime plasters and lime renders in any new construction project large or small.
It is a common misconception that lime as a building material is somehow 'out of date', and that modern materials have superseded it.
Lime in new build
From the NHBC Foundation technical information for the correct specification of lime mortars. To be read along with BS 5628-1:2005 on the structural use of unreinforced masonry made with natural hydraulic lime mortars. Free to download from the NHBC Foundation website.
Our Lime Lab
Lime Lab is our research department, and the place where we create new products, improve existing ones and look for even better ways of using lime-based materials in building.