One corner of my new slab-on-grade garage foundation is 1.375" lower than it should be. My garage door is level, but as a result of the low corner, there's a gap on one side:
The concrete guy has agreed to pay for whatever reasonable solution is necessary to address this. Here are the things I've ruled out:
- Mudjacking the whole foundation. I don't want to tweak what is otherwise a level, square, plumb structure.
- Adding more concrete to this corner. Getting enough in without messing up the drainage may not be possible.
- Removing some concrete from the other side. This creates other drainage problems (after running downhill about 12", the driveway slopes up and away from the garage).
The door vendor has recommended getting a thicker rubber seal on the bottom of the door. I'm worried that this will be ugly, could skew the door over time (since one side will be compressed more than the other) and may not make up the gap.
What other/better solutions are there?
Best Answer
Trough out the high side of the concrete where the door lands on it.
Get an angle grinder with a diamond blade. Mark the concrete on both sides of the closed door.
Cut 2 straight lines on high side and chisel/ grind away a trough equal in depth to the 1.375” gap.
I used a laser to determine how much material needed to be removed.
On my neighbors house it only required about 14 inches of trough to allow the gasket to make full contact.