Book - School of Science and Technology

Heat losses 25Construction (dimensions in mm) U value (W/m 2 K)105 brick, bare 3.27105 brick, 13 dense plaster 3.0220 brick, bare 2.26220 brick, 13 dense plaster 2.14335 brick, bare 1.73335 brick, 12 plasterboard on battens 1.53Dense concrete walls19 render, 200 concrete, 13 dense plaster 2.7319 render, 200 concrete, 25 polyurethane, 12 plasterboard on0.71battensPre-cast dense concrete walls80 concrete panel, 25 EPS, 100 concrete, 13 dense plaster 0.9580 concrete panel, 50 EPS, 100 concrete, 12 plasterboard 0.53Brick/brick cavity walls105 brick, 50 air space, 105 brick, 13 dense plaster 1.47105 brick, 50 blown fibre, 105 brick, 13 dense plaster 0.57Brick/dense concrete cavity walls105 brick, 50 air space, 100 concrete block, 13 dense plaster 1.75105 brick, 50 EPS, 100 concrete block, 13 dense plaster 0.55Brick/lightweight aggregate concrete block105 brick, 50 air space, 100 block, 13 dense plaster 0.96105 brick, 50 UF foam, 100 block, 13 dense plaster 0.47Brick/autoclaved aerated concrete block105 brick, 50 air space, 100 block, 13 lightweight plaster 1.07105 brick, 25 air space, 25 EPS, 150 block, 13 lightweight plaster 0.47Timber frame walls105 brick, 50 air space, 19 plywood sheathing, 95 studding,1.1312 plasterboard105 brick, 50 air space, 19 plywood sheathing, 95 studding with mineralfibre between studs, 12 plasterboard 0.29Party walls and partitions (internal)Brick13 dense plaster, 220 brick, 13 dense plaster 1.5713 lightweight plaster, 105 brick, 13 lightweight plaster 1.89Dense concrete block13 dense plaster, 215 block, 13 dense plaster 2.36Lightweight concrete block12 plasterboard on battens, 100 block, 75 air space,100 block, 12 plasterboard on battens 0.62Flat roofsCast concreteWaterproof covering, 75 screed, 150 concrete, 13 dense plaster 2.05Waterproof covering, 100 polyurethane, vapour barrier,75 screed, 150 cast concrete, 13 dense plaster 0.22TimberWaterproof covering, 19 timber decking, ventilated air space,vapour barrier, 12 plasterboard 1.87Waterproof covering, 35 polyurethane, vapour barrier, 19 timber decking,unventilated air space, 12 plasterboard 0.52