We have a 1910 end of terrace house in a London conservation area and wanted to have EWI on the end wall. We were told by the Council Planning Dept that it would have to look the same after EWI,as the wall is visible from the street and as it’s brick that would have been a lot more expensive than the standard render finish. We are allowed to install standard EWI at the back. There is too much original decorative finish on the internal walls to make it feasible; cornices, dados, rails, coving, skirtings etc not to mention radiators, cupboards, bookshelves etc.