What is harling?
– also known as Scat Coat, Thrown Coat or Rough Cast Harling is a technique for applying a coat of render or plaster. The lime mortar has extra water added to bring it to a runny consistency. It is then cast on the wall using a special tool called a harling trowel which has a curved blade. It provides a rough texture when cured that gives extra key for the next trowelled coat and also controls suction with very thirsty materials such as cob and brick.
