Abstract: An under deck drainage system is mounted on rail members connected to the bottom of deck stringers in a transverse orientation thereto. The rail members increase incrementally in thickness from the proximal end of the deck to the distal end of the deck where the water is discharged from the under deck drainage system so as to provide proper slope for the drainage of water by the under deck drainage system. A ventilation panel is mounted to the periphery of the deck to enclose the under deck drainage system yet provide an adequate supply of air to the system for drying water therefrom. The ventilation panel is formed with a ventilation portion that is located below the level of the deck stringers, and with a hem portion that has sufficient length to cover the under deck drainage system from view even at the distal end of the deck.

Abstract: An under deck drainage system is mounted on rail members connected to the bottom of deck stringers in a transverse orientation thereto. The rail members increase incrementally in thickness from the proximal end of the deck to the distal end of the deck where the water is discharged from the under deck drainage system so as to provide proper slope for the drainage of water by the under deck drainage system. A ventilation panel is mounted to the periphery of the deck to enclose the under deck drainage system yet provide an adequate supply of air to the system for drying water therefrom. The ventilation panel is formed with a ventilation portion that is located below the level of the deck stringers, and with a hem portion that has sufficient length to cover the under deck drainage system from view even at the distal end of the deck.