Tongue & Groove 3/4" - 26

This unique 3/4" - 26 radiused edge siding measures .750" thickness. Widths can be adjusted to any desired size within the limits of the machinery used to mill the pattern. The profile is composed of a 1/4" wide by 1/4" deep groove with a 7/16" radius round-over attached on one side of the design and a 1/4" wide by 1/2" deep tongue with a 7/16" radius rollover on the opposite side. When two pieces of lumber are joined, they create a 1/4" wide sunk fillet in the center of the two planks. There is a .012" void built into the joining area for expansion and contraction of the wood during seasonal changes in relative humidity.