N [HOMES COUNT L Lug HOMES Leaders t Excellence PRODUCT SPECIFICATIONS For 2 x 6 Spruce Log Siding Description; Kiln-dried spruce, # 2 grade or better, milled to finished size. Size: 1 %47 thick at curvature, 5 %" tall, Details; %4 groove, 12" tongue with 3/8” reveal after stacking. Coverage: 4 5/8” wall coverage. Conversion Factor; 2.6 lineal feet = | square foot. To convert wall square footage to lineal feet, multiply the length of the wall by the height of the wall to find the total square footage.