ROOF CONSTRUCTION

摘要

A roof is prepared wherein the water barrier layer is placed on a metal roof deck and waterproof thermal insulation is placed over the water barrier layer. A non-combustible fire resistant insulating layer is disposed beneath the water resistant layers and above the metal roof deck. The water barrier layer is not subjected to the extremes of temperature that are encountered when the water barrier layer is the outermost element of the roof structure and the structure is resistant to fire originating above or below the metal deck.