Solid hardwood floors should neither be installed over a concrete slab nor below ground level because of high moisture sensitivity. Unsightly gaps appear when moisture dries and the floors contract in the winter heating months. The floors expand and gaps disappear during summers. The wood planks may buckle or cup because of excessive moisture. In view of these facts, enough space should be left for expansion and wood should be acclimated. Nail-down installations are most appropriate for these floors. The possibility of re-coating and refinishing increases the life and appearance of solid hardwood floors. Generally solid hardwood floors are made up of ash, maple, red oak and white oak.

Solid wood floorings are divided into three sub categories: strip flooring, plank flooring and parquet flooring. Thickness of strip flooring varies between 5/16 inch and