Andy Hall wrote:

Eeyore said:

I have no problem seeing why at least some expectation of reasonable
performance
shouldn't be made of older ones, especially if accompanied by grants to
help..

Of limited value. On older properties with 230mm solid walls,

A minority of properties.


a very large proportion of total heat produced goes out through the walls.
There is very little that can reasonably be done about that.

It can certainly be inproved, not least with new wall plasters believe it or
not. Dry lining can make serious improvements too.

Graham