Hi, wondered if anyone can advise.
I purchased an 1898 Semi detached house last year. The house has no insulation whatsoever in the walls. It does have a thin cavity wall (around an inch air gap when I checked). However, I am reluctant to fillt this with insulation, as I have read that this can create damp issues. On the gable end of the house there has been pebble dash render appled (I presume this was put on as the brick work was probably eroded due this side facing all the weather and being exposed to the coast), which is in a bit of disrepair and requires re-applying. I was thinking of having the render removed and adding a layer of external insulation, then re-rendering over the top.
What I was wondering was would this do anything to improve heat loss from the house if there is a cavity (albeit only an inch) between the outside and inside walls? My other options would be a thin layer of insulated plasterboard insulation applied to the inside walls, after removing the old plaster.