In most cases, the area beneath second-story decks can easily be turned into extra square footage with a waterproof ceiling system installed on the underside of the deck. The space below decks has traditionally been exposed to the elements, because water and debris flow between each deck board. With an under-deck system installed, space that used to be dank and dingy can be used for a variety of purposes.
It is important to understand every aspect of installation and maintenance before an under-deck system is purchased. The Home Reports research identified a couple of good choices for under-deck installations.