Arris
Short Guide: Climate Change Adaptation for Traditional Buildings, published on 10 July 2017 by Historic Scotland, defines an arris as: ‘A sharp edge formed by the meeting of two flat or curved surfaces.’
Short Guide: Traditional Scottish Brickwork, published, on 1 March 2014 by Historic Environment Scotland, defines an arris as: ‘The sharp edge of a brick.’
Society for the Protection of Ancient Buildings (SPAB) definition from their online Glossary : 'A sharp edge such as on a brick, stone or corner of a door or window reveal.'
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