Linear thermal transmittance
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 linear thermal transmittance as: ‘…the measure of the additional heat loss, or thermal bridging, that occurs at component junctions, over and above the plane element heat losses.’
See also: Psi-value.
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