Big Creek produces buff mill run sills. Sills are sold by the lineal foot. The customer selects the height, bed depth and finish of the sills.

Sills can be purchased sawn-four-sides (S-4-S) which are random lengths 4 -8 feet, or sawn-six-sides (S-6-S) which are cut to ordered length. The sill face can be finished as machine pitched (also known as rock faced or dressed sills) or smooth faced, and with or without a drip.