On 30/12/17 14:29, AlanC wrote:

My mother-in-law recently moved house. Her old house had cavity wall insulation, which she had fitted about 5 years ago as part of one of these government energy saving schemes.

As part of the move, she had to have one of those EPC reports which correctly stated that insulation was retro-fitted into the cavity.

As part of the move, she had to fill in a questionair which asked all the usual things about who owned what fence etc. One of the questions was about cavity wall insualtion. It asked when it was fitted and why.

Are there any other reasons other than energy saving to fit cavity wall insulation?

Maybe I was reading too much into the question but I got the impression that it was viewed as a negative thing.

Alan


No - it's a +ve. It does work - limited to how wide the cavity is.

Some of the foam stuff injected in the 70s was notorious for causing
illness due to the fumes, but even that will have gassed off long ago.

The only negatives that I know of:

1) Polystyrene can eat cables if the latter are in the cavity.
Specifically it leeches the plasticiser from the PVC.

2) The blown fibre can settle - mine did a bit, but not so much that'd
you'd worry - it still works.