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Last edited 28 Jun 2022
Assessing risks in insulation retrofits using hygrothermal software tools, Heat and moisture transport in internally insulated stone walls, by Joseph Little, Calina Ferraro and Beñat Arregi, published by Historic Environment Scotland in 2015, defines an airtightness layer as a ‘Layer that prevents convective movement of air under the normal vapour pressure differences found in buildings and which may (or may not) also act as a vapour control layer. Such layers are sometimes known as ‘convection tight’.’
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