"Chris Hogg" wrote in message
...
On Sat, 30 Dec 2017 14:53:45 +0000, (Roger Hayter)
wrote:

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

There are allegedly some dramatic damp problems due to fitting it in the
wrong sort of situation, or with the wrong sort of householder. In
Merthyr Tydfyl and points south especially, for some reason. I don't
know the truth of the matter.

My wife's SIL bought a bungalow a couple of years ago that had cavity
wall insulation, (don't know the age of the bungalow, but maybe
1980's, or the age or type of insulation) but she has recently had it
removed because it was causing damp (how do they do that?).

OTOH my late mother had urea-formaldehyde foam injected into her 1960
bungalow cavity walls circa 1975 which appears OK; no sign of damp. I
always understood that U-F foam had a limited life, and went brittle
with age, and certainly the 'balloons' of foam that came up the cavity
into the loft space were brittle. But we've recently had a door cut
through what used to be an outside wall with a cavity, and where the
cavity is exposed, the foam has more the texture of cotton wool than
foam, and is in perfectly good condition with no brittleness.

--

Chris

Our 70's bungalow is similar - with U.F foam installed soon after it was
built. We've now made several large holes in the outside walls for major
alterations, and the foam is soft but still fills the cavity completely - no
apparent slumping or other changes. No apparent damp problems either,
despite being fully in contact with the outer leaf.

It appears to be a good long-term product - provided you are not having to
breathe the formaldehyde gas during the initial period after installation!

Charles F


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