The external wall insulation works are being carried out by Pegasus Externals Ltd from Bradford, an approved installer of JUB systems.
The insulation is 280mm thick graphite EPS (expanded polystyrene) made by S and B EPS Ltd in Northumberland. Lambda value is 0.032 W/mK. The boards are fixed by a continuous bed of adhesive (rendered on to the brickwork and thereby forming the air-tight line) and then mechanically restrained with EJOT STR U 2G anchors, 335mm long. Countersinking and plugging the heads halves the chi value (point thermal transmittance) from 0.002 W/K to 0.001 W/K, which doesn't sound a lot, but adds up when there are five fixings per board.
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AUTHOR
Russel and Anna Hayden
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