These terms represent molding profiles that relate to the joined edge of a piece of flooring. Tounge and groove is generally the most secure. Solid boards to be installed in parallel rows now produced in these thicknesses ½”, ¾”, and these widths 3” up to 12”. The strips are tongue and grooved and end matched. They are for nail down installation directly to wood or plywood sub floors; or over wood screeds on concrete slab construction.
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