When the gov first sat down with the likes of INCA etc and the render clad companies a few years back to discuss this blueprint they were asking for house prices of around 5.5k including all logistics such as scaff etc, the responses were mainly that it could not be done, seems they have crept up to a whole of contract cost of 8k to get it up and running.
average semi = 115 M2 max average scaff about 700 plus vat for that, then around £35 quid for the mats all in with sundries, skip plus wage of community liason officer or on site contracts manager (something that is becoming common requirement for lived in works projects) and hey presto - you have your lads sticking and pin fixing ins.board for three quid just like the pilot schemes in the north
green deal - ripping the ar5e out of the trade.