Harl

Harling is a Scottish term describing an exterior building surfacing technique. The theory of harling is to produce a long-lasting weatherproof shield for a stone building. A pigment can be embedded in the harled material, thus obviating the need for repainting. Harling is a technique used to surface many Scottish castles, but it is also used for a variety of common everyday building types. It is long-lasting and practical and well suited to the Scottish weather.