In article ,
Robin writes:
On 02/04/2018 15:04, Brian Reay wrote:

There
is a wall into a conservatory but I'm not sure if you can fit a cat flap
in a wall.

I have done so. Can make it easier to get bottom of the cat flap at
about the same height as the cat's tum than in a door.

I've not done one in a cavity wall but AIUI with them a "lining" for the
tunnel is *strongly* recommended

A friend was building an extension and needed to include a cat flap,
so he built it into the wall. It even had a lintel over it, because
he had an off-cut which was exactly the right length. The BCO saw
the small hole through the wall with a lintel before the doors and
windows were fitted and asked what it was. He thought it was hilarious.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]