It’s 3rd we have used coloured lime render and the more we use more like it as it does put a huge smile on customers faces.
One of our latest project is Full EWI System it’s very popular where new build houses for energy efficient.
It is finish coat which is made out of silver sand (finest sand) and lime. The finish coat does look smooth with a fine texture.
Sand cement lime render are not common to use because lime and cement are totally different elements.
If you use sand cement lime render it will kill the purpose of the lime which is breathable.
Putty lime is best to use to make a smooth mortar to apply easily.
To make the lime hydrate into a lime putty, it must be soaked in clean water for at least 24 hours. Theputty can then be mixed with an aggregate in a 1:3 lime:aggregate ratio.
There are 3 coat of lime and each coat has different ratio.
NHL mortars are today is primarily used in the conservation of buildings originally built using NHL mortars, but may be used as an alternative to ordinary portland cement. It is made principally of lime (hydraulic, or non hydraulic), water and an aggregate such as sand.