House plan dwg file. ROOM VENTILATION Habitable Rooms: (1) Background ventilation ie. Wall vent or controllable window vent and (2) Rapid ventilation ie. window. Kitchen Utility Rooms: (1) Background ventilation wall vent and (2) Rapid ventilation ie. window. (3) Mechanical extract ventilation system (see specifications). Bathroom: (1) Rapid ventilation ie. window. (2) Mechanical extract ventilation system (see specifications). VENTILATION TO ROOM CONTAINING HEAT PRODUCING APPLIANCES. Room with a fire, stove, range etc.: (1) A PERMANENT open wall vent. (2) Rapid ventilation ie. window. ROOF CONSTRUCTION Fibre Cement Slates/Natural Slate on roof With matching ridge capping. 38x38mm SW Counter battens treated on Breathable SarkingMembrane Tyvek Supro. All timber members to be strength class C16 & IS 444 Galvanised mild steel straps with a min. 30mm x 5mm section. Fixing ceiling joists & rafters to gable wall @1.2m c/c's Provide solid bridging at maximum 1350mm c-c's where floor span exceeds 2700mm. All timber members shall be strength class C16 and IS.444
