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!
Cheers
John