Hi
I want to extend one side wall of my garage by building a new solid block wall approx 2.3m high and link this to the end of the existing brick garage wall. What is the best method to link these two wals together making sure it is solid and waterproof? I was thinking of inserting wall ties to the new wall and removing the mortar from every other brick from the old one and cement these in, not sure if the cement is good enough to seal the vertical joint of the two wall for waterproofing.
Please help!!