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Hello, Need some advice on one storey mono low pitch roof. Details are..... pitch = 12.5° 3 off 114cm x 118cm centre pivot velux windows (SK06) Flash kit to be EDW for tile includes insulation & felt collar Tile to be either redland regentm marley melodie of forticrete centurion I know that...

Hi, In the middle of an house extension and would appreciate some guidance on boiler sizing. The house is a 3 bed detached two storey house built in 1960s so has small 50mm filled cavity walls. Width = 7m, depth = 8m, double glazed & insulated, room height = 2.4m. Extending two storey 3.2m...