Decking generally refers to wood, though maintenance-free vinyl and composite decking are also attractive options. For wood, choose from tried-and-true cedar or redwood – durable species with natural rot and insect resistance. Exotic woods like ipe, tigerwood, and mahogany have also come into favor. Fast-growing bamboo is a rapidly renewable and eco-friendly choice, and the safety of treated wood has improved substantially, making it another durable and cost-effective option.