"gort" wrote in message
news

If your friend's floor is floorboards (not concrete) and there is an air
brick on an external wall ventilating the under floor space then she
could
ask if a floor vent can be fitted instead of having a 4 inch diameter
hole
bored through the wall. As far as I am aware the regulations still permit
this.

Nobodies asked so I will, what is this to do with cavity wall insulation?.
Does this replace an existing vent or do they make a new hole?

Sorry, I didn't read this post before I asked.

When we had cw insulation it was never brought up. We don't have open fires
(i.e. solid fulel) but we have gas fires in two rooms and they need air just
the same.

We weren't asked about fires at all.

Mary

Dave