Hi, one of the brick walls of our garage has a large gap between it and the concrete slabs pavement outside. The gap is about 30-35mm and runs along most of one wall. Photos attached. The garage is a separate structure from the main house. The gap has been there even before we moved in 6 months ago. It could have been like this for years before us. The concrete slabs seem to have settled at a downward angle, which resulted in the gap.
QUESTIONS:
1) I assume this gap is not good and should be filled in? Is this suitable as a DIY?
2) I was thinking of filling it with mortar and then cover with waterproof seal of some kind? (I chose mortar over concrete because it's softer and I don't really know what I'm doing, so thinking mortar is easier to 'undo' and would less likely cause damage to the brick).
3) What kind of waterproof seal? (Not black bitumen as it's ugly. Maybe something transparent or greyish?)
(The rusted metal rod in the first photo has also been there since we moved in. I didn't want to remove it until I figure out why the previous owner put it there -- was it meant to prevent the gap from closing?!?!. However, when I picked it up yesterday, I saw it was loose and not at all attached to either wall or pavement).
Thanks in advance!
