I did some digging into the damage this evening. Sure seems like the pads are tied together with rebar now that I can see deep enough. This would explain why both pads are damaged in the exact same 4 places. Sure wouldn't have thought there was rebar between the two pads from the picture I...
That is exactly why I'm more concerned with fixing the problem rather than patching the damage. I don't know the problem.
There is no rebar attaching the 2 separate pads. The area under the doors are footers poured 36" deep, the pad is only 5". Thanks for any input.
I converted my 30x56 FBI building from storage to a heated shop back in '12. I have 2 16x10 OH doors in the building with a small pad outside of each one. My concrete contractor is getting all the blame in my opinion but figured I'd check with others that are more knowledgeable on this...
That is the exact same heater I have in my 25x25 garage and I love it. I use mine to keep it at a constant temp overnights and use my LP blue flame wall heater to raise the temp to a comfortable temp when I am in the garage. In extreme cold temps I use both of them to keep it comfortable...