Ventilated roof system and method

摘要

An energy-efficient ventilated roofing system and method provides a deck protected from the weather by shingles and a sub-deck in a spaced apart relationship below the deck. The sub-deck is covered by a barrier fabric that is permeable to water vapor but that is substantially impermeable to liquid water. The deck and sub-deck define ventilation channels. The barrier fabric allows water vapor to escape from the building while acting as a secondary barrier to liquid water that may penetrate the shingles and deck. The ventilation channels allows the flow of ventilation air under the deck, avoiding damage to the deck and preventing blinding of roof ventilation due to building insulation or structural members or building debris.

主权项

1. A ventilated roof system, the system comprising:
a. a building; b. a sub-deck, said sub-deck being attached to and supported by said building, said sub-deck having a pitch, said sub-deck being permeable to water-vapor; c. a barrier fabric disposed upon and supported by said sub-deck, said barrier fabric being permeable to water-vapor and substantially impermeable to liquid water, said barrier fabric and said sub-deck being adequately water-vapor permeable to avoid condensation in an unventilated attic under said sub-deck; d. a deck, said deck being supported in a spaced apart relation to said sub-deck, said deck and said sub-deck defining a ventilation channel between said barrier fabric and said deck; e. a plurality of shingles, said plurality of shingles being attached to and supported by said deck.