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Insulated Trapdoor 62mm thick (U-Value U = 0.58 W/m²k), white faced on underside The draught proofed timber hatchbox supplied is constructed from 19mm plywood (white finish) and measures 240mm deep Trapdoor also fitted with a sprung loaded catch (ring pull operated) for lowering and closin...
How thick is the insulation under the boards? D Dr Bodgit Guest Nov 28, 2016 #5 Under the boards is 100mm Knauf Earthwool. Thought I might as well put something there as otherwise its wasted space. D Deleted member 164349 Guest Nov 28, 2016 #6 Worst move I ever made was makin...
This method is only limited to the walls or the thick shear wall. Another method is to directly stand another channel to support cross channel, vertical channel to fixed on the wall. This method is to consider the vertical channel floor where the load-bearing capacity, should be more ...