I did my first TSB Phase 1 air leakage test yesterday, with Pete Warm and GSK Architects. A Housing Association property, end terrace, in Plymouth. We ran a sweepstake on the result - and the tenant won - his guess of 17 was closest to the measured result. Good politics, but just by luck. And when we taped up the very poor back door we reduced the air permeability by 1.
Since the TSB scheme positively said that it would pay for Phase 1 air permeability tests, I'd be interested to know how many AECB members involved in schemes put in air leakage testing? I know I haven't done many specific quotes for TSB schemes. If there were 400-odd applications and something like 130 Phase 1 appointed, how many included testing? Surely we know by now that trying to retrofit to good levels of airtightness, AECB Silver or better, is next to impossible without the detailed knowledge that a preliminary test provides? Also, if the EST is keen on before and after comparisons, surely a pre-test is essential?