Non-hygroscopic material
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 a non-hygroscopic material as a: ‘Material which lacks the ability to take in moisture below saturation vapour pressure. Moisture accumulation in a non-hygroscopic material results in a liquid water build-up on the surfaces of the material, which can lead to permanent damage if the quantity of water exceeds certain thresholds (e.g. slumping mineral wool becoming com-pressed).’
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