"nightjar .uk.com" nightjar@insert_my_surname_here wrote in message
...

"John" wrote in message
...
My Sister In Law is CONVINCED she has mice and they are coming through
the airbricks!! No amount of reassurance from my Brother or myself will
stop her and she wants the airbricks blocked up. This is NOT an option
obviously, so she is asking us about putting some sort of grids over
them. They live in quite a large bungalow and there are approx 30
airbricks. They are the 'standard' type i.e. same size as a brick and
with two rows of small square holes. Can we do this without any
detriment to the airflow and if so what is the best size of mesh to use
so as to stop the 'mice' and still allow airflow. By the way my Brother
has mentioned divorce may be an option!

As a guide, if you can push an ordinary Bic biro though a hole, a mouse
can get through it. The answer used to be galvanised perforated metal, as
used on meat safes, but I expect expanded metal is easier to get these
days.

I have a roll of perforated galvanised AND a roll of perforated stainless
steel.

Offers?

Mary

Colin Bignell