Victorian ‘EnerPHit’ EWI Costs

Difficult to determine exact costs but the EWI was about £11k plus perhaps another £4k for associated works like reworking the gullies and soil pipe so a total of around £15k.  It was a small job (32m2) but this makes the meterage rate around £450/m2!  However, this was a Rolls-Royce option with woodfibre, thick insulation, below DPC, proper detailing, bespoke eave etc etc.   You could easily add another 20% to these figures for project management and professional oversight.  The windows, fitted would be about £9k on the open market.  Luckily the Government  GDHIF knocked £6k of this figure otherwise it would be prohibitively expensive.