Maryland’s climate is genuinely hard on outdoor structures. Hot, sticky summers. Freeze-thaw cycles in winter. Active subterranean termites in virtually every county. Salt-laden air pushing in from the Chesapeake Bay. The siding material on your shed determines how well it weathers all of it — and the right choice here in Maryland looks different than it does in a drier or milder climate. This guide compares vinyl, LP SmartSide engineered wood, and natural wood through the lens of what Maryland weather actually does to a shed over 10, 20, and 30 years.