Tongue & Groove 1-1/2" - 11

This 1-1/2" - 11 v-groove decking/siding measures 1-1/2" in thickness, and the widths are adjustable to desired sizes. The profile consist of a 1/2" wide tongue with a 3/8" wide chamfered edge; the groove is .031" larger to allow for expansion and contraction. Generally, the thicker the lumber, the more space is allowed for the board's movement. When two pieces of milled lumber are joined together, they create a decorative 3/4" wide v-groove on the face of the merged planks.