Originally Posted by DoubleWasp
Aggressive suckers!
What about closing the garage door, laying metal strips along the bottom of the door (aluminum stock?) and then using self drilling screws to screw it into place on the door, exactly where is? That way, the strips will be perfectly aligned on the door with the ground, without having to use any rocket science.
This would protect any seal you use. If those rats start eating through aluminum, use a camera to verify you don't have a xenomorph infestation.
This was the direction I was suggesting. If the weatherstrip is on the bottom edge of the door, not extending out and metal strips are installed on each side then you could achieve a solution that prevents drafts from coming under the door and also protects the stripping from these critters.
If the metal strips are painted the same color as the door nobody will notice them.