Thread: Squat rack on a tile floor

I'm about to pull the trigger on the REP PR-5000 V2 Power Rack and about 300 lbs of bumper plates. I can't bolt it to the floor, so I'm also getting the Front Extensions. It's going on a tile floor. I don't want to destroy the tiles. What would be the ideal thing to put on the floor to protect the tiles from the squat rack and dropping weights.