Harl

In Scottish usage, harling describes an exterior building-surfacing technique which results in 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 as a technique provides the surface of many Scottish castles, but it is also used for a variety of common everyday building types. Long-lasting and practical, it well suits structures in the Scottish climate.