We bought our house about 6 months ago and the basement had just been recently renovated and finished. They walled off the area and put a door on it. The room has a rough in for a toilet and sink. It also shares the furnace, water heater and sump. To give an idea if your standing at the door looking in the toilet would be directly to the left, the sink would be directly in front of you and the corner to forward left (between the toilet and sink) is where the sump hole is. to the right would be the furnace, water heater and a couple shelves for storage. The drain is basically in the middle and the room is essentially a rectangle. I want to put the toilet and sink but am worried about what type of flooring. Is it ok to use the wood click together style with the padding built into the bottom? Should I just lay it on the bare concrete and try to keep the slope of the floor towards the drain?