To create holes, use a brace and bit to drill through the flooring, and then a keyhole saw to widen the entrance. Make sure that the holes are not exactly above a floor joist when you drill them. In fact, the joists & studying must be spared as much as possible while installing the water heater equipment.
Having a house with a good interior and exterior decoration is something to brag about. Most people usually value one over the other, making the balance between to two, actually rare to meet.
Skim coating is a texturing technique used to make a wall smooth. This technique is useful for hiding imperfections in constructions, to give the wall a plaster-like look.