Timber flooring is not generally preferred for ground floors. If it is used as a ground floor, the prevention of dampness is most important. Timber floorings can be provided in any one of the following methods. Strip flooring consists of narrow and thin strips of wood jointed to each others by tongue and groove joint. Planked flooring is one type in which wider planks are used and they are also of tongued and grooved type. Wooden block flooring consists of small square or rectangular blocks with tongue and groove joints, Fig. 23.5.
Figure 23.5 Wooden block type timber flooring
Timber flooring should have a concrete base or should rest on joints spanning across dwarf walls which are constructed at suitable intervals. For fixing the timber floors on concrete slabs, longitudinal nailing strips are provided. Planked flooring should be laid with spaces of metals spaced 1 mm apart temporarily for providing expansion joints. Strip flooring is used in thickness of 2–2.5 cm and width of 6–10 cm.
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