Hi,
I have a brick home and noticed that on the outside walls just above ground there is a empty space (about 1centimeter) between the bricks & joint that is not filled up with joint cement. This is conssistent around all home. Is this done on purpose? If yes, then why? To let wals "breathe"? I am asking this as I have ant problem in my house and I would like to close all gaps so ants would not be able to enter house.
Thanks