When we bough out house we were told verbally it has cavity insulation.
We have nothing in writing and several other things we were tile have
tuned out to be incorrect. Is there an easy way to determine whether
insulation is present?
Assuming that it's a retro-fit - and not built in on day one - they will
have had to drill a matrix of holes through the mortar at intervals of about
1 metre in order to inject the insulation. They will have filled the holes,
of course, but they are usually still visible if you look closely.
Failing that, remove a brick and look inside the cavity. If there's nothing
but fresh air . . . you'll know the answer!
What's the age of the house?
What's the wall construction (e.g. brick outer, thermal block inner)?
Were you told what type of cavity insulation?
Some types used to be blown in through ~1" holes (and probably
still are for retrospective installations). If there are any areas
unplastered on the inside, can you see any such holes drilled every
few feet (and possibly mortared over). Might alternatively have been
done from the outside.
Have you ever drilled a hole right through the wall?
Check for signs of carefully filled holes about 1m apart on the outside
You could drill the outside wall and see if there are traces of the
filling material on the drill or on a bent piece of wire that you stick
in the hole.
Another sign is comparatively low heating bills!
I had cavity wall insulation fitted a couple of years ago and the
difference is truly amazing. I can utterly recommend it to anyone. You
can also easily obtain a grant towards large part of the relatively low
cost(and no, I don't work for an insulation company).
If you find you don't have it, get it done asap.
Incidentally, I think it may also help somewhat with damp problems on
the internal wall. It would seem logical that moisture will condense on
the now much colder outside wall, having evaporated from the usually
warmer inside one. Just my guess.
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