LockDry® decking is one of the most durable decking products available. Because of the aluminum construction, it is able to withstand extreme heat and cold. Aluminum has a working temperature of -400 to 400 degrees F. It is completely fire proof and has a melting point over 1200 degrees. LockDry aluminum decks will not freeze and crack because aluminum does not absorb water. They also have very low expansion and contraction characteristics because of the lack of water absorption.