I currently have a garage built upon an existing concrete slab (I believe a plain 4" slab, no foundation wall at the edges). The framing currently sits on an untreated 2x4 wooden sill plate.
I'm considering either
a) replacing the 2x4 sill with a pressure treated 2x4 sill or
b) Cutting the bottom 8" of the framing and retrofitting a concrete curb wall, using 15cm wide, 8" tall, 16" long bond beam (like this: http://www.homedepot.ca/product/15cm-sm-bb-grey/969057#
A is my much easier option, B is my much more difficult option.
In addition to the complication of lifting the garage to place the bond beams under, my biggest question mark is this - how do I anchor this new bond beam curb wall to the existing slab? Do I just drill holes into the slab at prescribed intervals and epoxy in a piece of rebar?
Given all the difficulties, I'm strongly favouring option A at the moment, but want to ensure I fully understand both of the options before making my final decision.
Thanks in advance!