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Insulated hinged loft access hatch and frame sets to provide simple, easy access through ceilings into the loft space. Loft doors with zero air leakage at Part L's 50 Pa - under positive test conditions. Featuring an integral anti-draught, vapour and condensation migration seal with a choice of insulation U value performances of 0.82, 0.35 and 0.25W/m2k. Simple twist operated catch release with secure key lock option. Tested by BRE (Building Research Establishment) as meeting Building Regulation Part L’s reasonable air leakage requirements of <10m3/(h.m2) at a pressure differential of 50Pa and BS5250:2011 • *air permeability measured at 50Pa as 0.00m3(h.m2) under positive pressure test conditions. Designed to fit between 38mm thick trussed rafters or ceiling joists spaced 600mm centres which provide a clear joist opening width of 562mm. Clean simple design that will blend well with most surrounding decors, with slightly textured finish that can be painted if required. Concealed downward opening hinge mechanism allows use with Timloc’s aluminium telescopic loft ladder systems.
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