Hi everyone, I am a new to doing renovation to my house. just gotten a resale hdb with my wife. Renovation is in progress until the final stage. Today, the contractor/ ID did a major wash to the kitchen floor. After the wash, i found the water accumulates to the Middle of the kitchen. I did heard from the Old folks and my dad that, some hdb, the water will flow to the back of the kitchen, where the "Holes" are, and it will drain out the water Does any renovation Pro knows if this is meant to be? Or there is no issue to be alarmed and i can safely ignore that.