Steel sheds perform best on a concrete slab, gravel pad, or paver base, all of which provide a solid, level, and moisture-resistant surface. A concrete foundation is ideal for anchoring and long-term stability. Wood sheds can also use these bases but are sometimes built on pressure-treated wood platforms, which may require more maintenance. For durability and longevity, especially in Canada’s freeze-thaw climate, a solid concrete or gravel foundation is recommended for both but essential for steel.