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The species or species mix chosen for a floor will generally be determined by the required look of the floor, hardness requirements, availability and price. The sapwood of many hardwoods is much lighter than adjacent heartwood. If a species with lyctid susceptible sapwood is selected, any sapwood present in the boards must be preservative treated. Treatment with CCA will usually impart a green colour to the sapwood.
Hardness gives an indication of a speciesb resistance to indentation and, to some extent, abrasion. Floors that may be subject to high traffic volumes or high point loads such as those due to stiletto heels may require specification of harder species. Soft timber species can be expected to indent under these conditions.
Floor finishes do not improve indentation resistance of a floor, but may affect abrasion resistance.
References: TRADAC Technical Data Sheet 11