The Atlas Sheds Budget Range Garden Shed is ideal for those who want a cheap quality storage shed. The Budget Pent C model features a 12mm Tongue & Groove door panel, with the rest of the shed made from strong OSB. Oriented strand board (OSB), also known as sterling board, is a type of engineered lumber similar to particle board, formed by adding adhesives and then compressing layers of wood strands in specific orientations.