If the House Builders Federation really wants that, it does not deserve to be listened to – except to warn people to steer clear of any builder associated with it. The HBF should be proclaiming from the rooftops that it supports all efforts to improve sound insulation in houses and promote the highest standards, instead of trying to avoid meeting even the minimum standard.
Sound insulation in houses, or lack of it, is a serious problem, as many disputes between neighbours show. Ask any new house owner what their priorities are, and peace and quiet will be higher than you think. It is too late once you've moved in to discover that noise passes through the wall from next door.
Jim Robinson, via email.