Cavity wall insulation - new builds

Keep_pedalling

As has already been said there is a huge difference in CVI that has been injected as a liquid foam into an old house and the dry sheets installed in new builds, they are totally different materials.

moneysavingchump

davidmcn said:

OP, I would suggest you figure out quite what the problem is - if it's "being in a warm house", surely that would be an issue no matter how it's become warm? If it's a particular material in CVI which you're sensitive to, then try to identify what that is, given there are a variety of insulation products used (and you might encounter them in places other than CVI).
And of course it might be something completely unrelated you're suffering from, in which case you'd want to get that diagnosed.

In a none CVI house the heat will release, in a CVI house the heat will hang around, that's the whole point of it. Also a none CVI house will 'breathe' better.

As i only suffer when in a house with CVI i don't see that their is an issue with my health. My health in general is excellent. I accept that i am person that prefers it cooler to hotter, but that is not a medical condition.

Anyway as i said i did not intend this to be a debate about CVI, i have no problem with anyone else having it if thats what they want. Just needed to know if it was as easy to remove from new builds as retro, and that has been answered.

AdrianC

RelievedSheff said:

moneysavingchump said:

AdrianC said:

Building Regs require a certain minimum heat-loss standard. You simply are not going to get that without wall insulation - whether in the cavity or on one side or the other.

If you had retrofit CWI installed, it's entirely possible there's some kind of reaction to the chemicals used in the installation. Retrofit is completely different to build-in.
Build-in tends to be big slabs of insulation, which clearly isn't viable during retrofit, which tends to use foam or granules.

And those sheet insulation products are used in a LOT of different ways...

Thanks. Yes that was my worry, that it would be too difficult to get out of new builds. Guess ill limit my searches to older properties. An idea how old i have to go back roughly to avoid the in-built stuff?

Pre 1920's will generally rule out cavity wall insulation.

Unless it's been retro-fitted, like the place that set the OP off...

FreeBear

RelievedSheff said: Pre 1920's will generally rule out cavity wall insulation.

Cavity wall insulation didn't really get fitted in new builds until the 1970s. So anything earlier shouldn't have it by default (although it may well be retrofitted). Cavity walls started to be used during the late Victorian period, but wasn't widespread until the 1920s/30s.

sgun

Our house is 1970 and no cavity wall insulation - can't retrofit either as we are too exposed to wind driven rain. So maybe go for something up a hill just to be sure.