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Old suspended Fl; insulation, breather membrane, plywood between joists
Sorry, this is a nested question.. Old suspended 1960s floor comprises: 3" void, 3" timber heights (sat on engineering bricks, levelled with cement), floorboards. Joist spacing sees 440mm approx inbetween joists. Joists are 2.5" wide. Goals: - insulate between timbers - UFH: install over tray...