Solid wood floor glued down on concrete: hollow spots
How to fix laminate flooring that's lifting? More details in comments. : r/Flooring
Repairing Loose Spots (Just Like a Watermelon) | Wood Floor Business
How to repair bubbled veneer before refinishing? Veneer lifted in a couple spots ages ago due to some hot take out. Was tempted to use a syringe to inject some wood glue