Tongue and Groove Solid Wood Flooring
Tongue and groove solid wood flooring is a type of flooring that uses the most common joining method; each board in tongue and groove flooring has a protruding tongue on one side and an indented groove on the other, so it fits easily with the board next to it. The tongue and groove format is the most cost effective fitting method, a good deal cheaper than the newer and more sophisticated "click" system, which is one of the main reasons that it is more commonly used. Because it is the most common installation method, there are also far more types of wood available with tongue and groove.
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