roof deck

English

Noun

roof deck (plural roof decks)

1. The flat layer of construction materials to which the weather impervious layers are attached to a form a roof. It is known as the "roof deck", and they may be either level (for a "flat" rooftop) or sloped.
   • 2024 March 3, Wikipedia contributors, “Deck (building)”, in English Wikipedia‎^[1], Wikimedia Foundation:

     In multi-story commercial construction, the dominant form of deck (including roof deck) construction is composite steel deck.

2. An upper deck of a ship that provides shelter for another deck underneath.
   • 1913 May 29, “SS Gallia AND SS Lutetia”, in Shipbuilding and Shipping Record, volume 1, LONDON: Queen Anne's Chambers, S.W., page 323:

     There are four decks under the main deck and three above, which are named the roof deck, the promenade deck, and the boat deck