The answer to 'types of roof decking' is that there are several common materials used for roof decking, the structural layer underneath the roofing material. The most common types of roof decking include plywood, oriented strand board (OSB), and dimensional lumber like tongue-and-groove boards. Plywood and OSB are the most popular choices for modern roof construction due to their strength, durability, and ease of installation. Dimensional lumber decking is less common today but can still be found in older homes.
Plywood and OSB roof decking are made of wood sheets or panels that provide a sturdy, flat surface for the roofing material to be installed on top of. They are typically 1/2 inch to 3/4 inch thick and come in 4x8 foot sheets. Dimensional lumber decking, on the other hand, uses individual wood boards that are nailed or screwed together to create the roof deck.