Please ask contractor to focus on Floor 4, which is the area that we have employed the contractor to fix it for quite a while, however, it is still leaking at the same spots (Crostini, Roof 409 and P60). If they come tomorrow, then, they need to tell us what is the cause and how they plan to fix it. We have to find a long term solution for this.
I agree that if we have a good check at the beginning, we may not have this leak problem. Every problem can be fixed. Please ask the contractor to work this out. Our team gets a lot of complains and difficulty to explain this to tenants.