Douglas Fir Wood Slabs are 2-1/2 to 3 inches thick in various widths and lengths up to 16 feet. The slabs are natural edge (some bark may still be attached), rough cut and unfinished. Air dried Douglas Fir Wood Slabs start at $3.30 a board foot. Kiln dried Douglas Fir Wood Slabs start at $4.02 a board foot. For an added price we can flatten your slab on our CNC Router Table. The pictures were taken when the slabs were first cut and sprayed with water. During the final drying process some end splitting and cupping may occur.