Following government announcements in 2001 for the compulsory acoustic testing of all new dwellings with party walls or floors, the house building industry proposed an alternative. This was that buildings using approved generic wall and floor constructions would be deemed to comply with the acoustic regulations in Part E of the Building Regulations, and would not therefore require testing. This proposal, by the House Builders Federation, was accepted in July 2002, and 13 designs were included in a consultation document. Subsequently, three designs failed to meet the regulations and were excluded. Wall construction using aircrete block, lightweight aggregate block, high density aggregate block, timber and steel; and floor construction using pre-cast concrete slabs, reinforced concrete, timber joists, and concrete on metal decking are briefly described.