I am in a small Victorian terrace. Had new windows, new boiler and some insulation put in recently ( limited by nature of property). I am a bit disappointed by results. Downstairs area has an extension and is better insulated (some new walls) so if I heat that area it seems to retain heat for longer. Upstairs is pretty chilly. I put heating on at bedtime yesterday for a couple of hours and it was about 16.5. No heating on since then and it’s 14 degrees upstairs. I am in London by the way and outside it’s 5 degrees.
is that to be expected in an older house?