My Building Neighbor Refuses to Let Me Inspect Their Apartment Despite a Suspected Leak from It — What Do I Do?
This is a sensitive situation that needs a gradual approach: start with a friendly conversation explaining the damage you're experiencing and requesting a simple inspection that won't take long. If the refusal continues, a technical report documenting that the leak source is from a specific party (based on first inspecting your own apartment to rule it out as the source) strengthens your position, after which you can turn to building management or the relevant mediating authorities if the matter isn't resolved amicably.