There's a few bricks around my house about 40cm up from ground level where the vertical mortar between the bricks has completely fallen out / eroded away.
In a few spots, there's insects going into it and making a home.
I think I should fill it in, but I'm not sure of the best way to do it.
Mix up some mortar? Just use caulking?
I'm in SWO, Canada, so whatever I do has to be weather resilient.