3" gap between concrete driveway and concrete garage floor - help!
So I have a 3" gap between my concrete driveway and concrete garage floor for expansion. It is much larger than I have seen for expansion joints. It also has some semi soft material in it, but not filling the gap. The gap lines up to where my garage door meets the floor when down. So the garage door actually slides into the gap, but it is not a tight seal. I am in the process of preparing to lay vct in the garage and want to put down a 3.5" rubber threshold. *The problem is with such a large gap and where it is located, I have no way to support under the threshold, nor a way to secure it to the floor.*
Any ideas on how to address so I can out down the threshold to give my soon to be new floor a finished look? *Thanks.*