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A venting system for allowing the escape of harmful water vapors trapped in the roof system. The system includes a roof deck forming the base of the roof system, a roofing membrane positioned over the roof deck, and a channel network positioned between said roof deck and said roofing membrane to for

A venting system for allowing the escape of harmful water vapors trapped in the roof system. The system includes a roof deck forming the base of the roof system, a roofing membrane positioned over the roof deck, and a channel network positioned between said roof deck and said roofing membrane to form a plurality of venting passages below said membrane. The channel network comprises a plurality of integrally formed channel members arranged to form a grid covering the roof deck. The cross section of the channels is shaped as an inverted trough, thereby providing sufficient strength to the network\s surface to support the outer roof treatment and/or to permit an installer to walk across the surface of said network without collapsing it. Roof vents pierce the roofing membrane and provide a relief passage communicating with the venting passages. Water vapor trapped beneath the roofing membrane is channeled through the venting passages to the roof vents where it evaporates into the atmosphere.

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A ventilating network for use with a built up roof system to permit the escape of water vapor trapped below a waterproof membrane, said ventilating network comprising: (a) a first set of channel members including a plurality of spaced apart channel members that extend generally parallel to one anoth

A ventilating network for use with a built up roof system to permit the escape of water vapor trapped below a waterproof membrane, said ventilating network comprising: (a) a first set of channel members including a plurality of spaced apart channel members that extend generally parallel to one another; (b) a second set of channel members including a plurality of spaced apart channel members that extend generally parallel to one another; (c) wherein the channel members of one set intersect with the channel members of the other set to form and open, grid-like channel network having a plurality of open spaces between said channel members; (d) wherein each of said channel members has an inverted, trough-shaped cross section that defines a moisture venting passage; and (e) wherein the moisture venting passages of said first and second sets of channel members communicate with one another to form said ventilating network.