Well done. Since the leak probably comes from the floor above, here's what you need to know: if your neighbor doesn't answer, notify the building manager or caretaker and, if there's a danger, the fire department can have the door opened. We can come to your place tonight to locate the leak and make it safe (shutting off the riser if necessary).
Saturday evening emergency call-out: call-out + 1 h = €160 incl. VAT, then €70/h. Repairs at the neighbor's will be covered by their insurance; I'll explain the water damage claim.Step 2