Living in a high-density area like London means that a small leak can quickly escalate into a major issue for multiple properties. I think back to a friend whose apartment leak affected his downstairs neighbor – not a pleasant situation! Effective leak detection methods in such areas include using advanced technology like acoustic sensors, infrared cameras, and moisture meters. I’ve personally used an acoustic sensor in my flat; it was surprising how it could detect even the smallest leaks behind walls. Another effective method is installing smart water detection systems that send alerts straight to your phone if a leak is detected, allowing for swift action. If you want to dig deeper, there's a great resource that I came across. On a related note, scheduled professional inspections can also help pinpoint potential issues before they become communal nightmares.