What is meant by Harling?
Harling can refer to several different things, but in a construction context, it means a roughcast wall finish, often applied to a stone wall to protect them from the elements.
Harling is a technique of casting a slurry typically of lime and coarse aggregate onto a wall, creating a textured finish.
Traditional Building Technique
Harling is a traditional building technique use to coat walls with a rough, texted finish. It was originally used to protect walls from wind-blown rain and penetrating dampness.
It involves a mixture of lime mortar and small stones or shells, which are hurled or cast onto a wall.
The result is a rough, textured surface that can help to protect the underlying wall from moisture and weathering.
Alternatives include roughcast, west dash or spray textures.
Whilst harling was traditionally used on older buildings, it can also be used on contemporary structures where a vapour open construction is being used.