372595673

5		As 1, cciling removed, with suspended ceiling consisting of 2 layers of 15 mm wallboard or layers of 12.5 mm dense lasterboard, suspended special resilient hangers to give 275 mm cavity containing 80-100 mm lightweight minerał wool (>10 kg/m^3)	60-65	55 - 60	450 - 500
6		As 1 with proprietary lightweight floating floor using resilient pads or strips (e.g. 15 mm tongue-and-groove floorboards on a 15 mm plywood, chipboard or fibre-bond board supported on 45 mm soft wood	50 - 55	60-65	270 - 320