Tongue and groove porch flooring provides a durable, attractive surface that can withstand the elements. It is made of interlocking planks with a tongue on one edge and a groove on the other, which creates a tight seal when they are fitted together. This type of flooring is easy to install and can be used on both indoor and outdoor porches. It is available in a variety of wood species, including pressure-treated pine, cedar, and redwood, each with its own unique characteristics and durability.