WEBSep 7, 2021 · Knotty Cedar T&G a Dura-Groove® Cedar is the best value in prefinished premium interior cedar wood plank paneling. SPECIFICATIONS 6” Wood Options 100% Premium Knotty Cedar Nominal Size 1” x 6” Profile Traditional Tongue & Groove V-Groove Actual Size 11/16” x 5-1/8” Plank Lengths 8’, 12’, 16’ Random Lengths Exposed Width 5”