There are three different under deck ceiling systems available ...
The DRY-TOP under deck ceiling uses interlocking aluminum panels as the primary water collection device. The panels empty into an aluminum gutter that is attached to the perimeter of the system. The perimeter gutter appears as crown molding. The gutters empty into a downspout directing the water away from the patio area.
The DRY-TOP Lite under deck ceiling is an economical system which uses one gutter on the outside edge of the deck. The ceiling does not have the perimeter gutter system. The appearance and functionality differ from the full DRY-TOP treatment. The gutter empties into a downspout directing the water away from the patio area.
The Concealed System also uses a rounded channel but is installed between the deck joists allowing it to be concealed by the deck boards above and a separate ceiling below. The Concealed System has only one gutter on the front edge of the deck. More Information Here
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