Part H: Drainage and Waste Disposal
An adequate system of drainage shall be provided to carry foul water from appliances within the building to one of the following listed in order of priority a a public sewer or where that is not reasonably practicable b a private sewer communicating with a public sewer or where that is not reasonably practicable c either a septic tank which has an appropriate form of secondary treatment or another wastewater treatment system or where that is not reasonably practicable d a cesspool http://www.simplifydiy.com/building-regulations/part-h
Wood Flooring
With this is mind it is imperative that wooden floors are protected from dampso a concrete subfloor must be covered with a dampproof membrane and a wooden subfloor must have sufficient ventilation beneath it usually via air bricks to keep the floor surface dry http://www.simplifydiy.com/floors/wood-flooring
Solid Hardwood Flooring
As the name suggests these floors consist of tongueandgroove planks cut from various species of wood to a range of sizes http://www.simplifydiy.com/floors/wood-flooring/solid-hardwood