Very interesting question. I will be watching for answers. Several condos on my street have had to redo their lines - about $6,000. My insurance, State Farm, is working on getting insurance to cover the problem. BTW. All the condos were owned my Snowbirds. Is that a hint to the situation?
Good to know slab might not have to be torn up. In my neighborhood they were. I just had my courtyard resurfaced for quite a few $ and would hate to have to redo it.