Under deck drainage system

Abstract

An under deck drainage system for a fluidly pervious deck of light frame construction provides paired spacedly opposed elongate fastening brackets, carried on adjacent surfaces of opposed pairs of deck supporting joists, with a downwardly curving drainage panel extending therebetween to receive and transport drainage to a deck edge perpendicular to the joists. The fastening brackets are sealed against the joists carrying them and provide two vertically spaced fastening arms that sealably engage the edges of the drainage panel carried therebetween in a releasable, positionally maintainable interconnection of opposed tooth-like fastening ridges carried by the drainage panel edges and the fastening arms.

1 . A drainage system for a deck, having an underlying framework of parallel spaced joists supporting a fluidly permeable deck surface, to collect and remove drainage from beneath the deck surface and transport the drainage to a deck edge perpendicular to the joists, comprising in combination: 
 a plurality of opposed cooperating pairs of elongate fastening brackets carried on the proximal vertical surfaces of each adjacent pair of joists, each said fastening bracket having 
 a vertically extending arcuate body formed of resiliently deformable material with the medial portion of the vertical body extending away from the joist carrying it,  
 an upper fastening arm and a spacedly adjacent lower fastening arm extending spacedly away from the fastening bracket body and distally from the joist supporting the fastening bracket, with at least one of said fastening arms angulated to extend toward the other fastening arm in a direction distal from the fastening bracket body and wherein at least one said fastening arm defines at least one fastening ridge angled in a direction toward the body, and  
 each of said fastening brackets carried on the supporting joists in substantially co-planar array angling downwardly toward the deck side perpendicular to the joists, whereat drainage is to be moved; and a plurality of elongate drainage panels having side edges extending between each opposed cooperating pair of fastening brackets, each said drainage panel having  
 an arcuate cross-section extending downwardly from each side edge to a depending medial portion, and  
 each side edge defining at least one fastening ridge, to extend between the fastening arms of opposed pairs of fastening bracket to fastenably engage the at least one cooperating fastening ridge of the at least one fastening arm of each cooperating pair of fastening brackets.  
   
   
   
       2 . The drainage system of  claim 1  further characterized by the upper edge portion of the body of each fastening bracket having an upper edge seal with an outwardly tapering wedge-like configuration angulated toward the supporting joist, said upper edge seal being formed of flexibly resilient material having less rigidity than the remaining portion of the body of the fastening bracket to seal the upper edge portion of the body on the supporting joist.  
   
   
       3 . The drainage system of  claim 1  further characterized by the outer edge portion of the upper fastening arm of each fastening bracket having an upper fastening arm seal with an outwardly tapering wedge-like configuration, angulated toward the lower fastening arm and formed of flexibly resilient material having less rigidity than the remaining portion of the upper fastening arm to seal the outer edge portion of the upper fastening arm on a drainage panel carried therebeneath.  
   
   
       4 . The drainage system of  claim 1  further characterized by a outer edge portion of the lower fastening arm of each fastening bracket having a lower edge seal with an outwardly tapering wedge-like configuration, angulated toward the upper fastening arm and formed of flexibly resilient material having less rigidity than the remaining portion of the lower fastening arm to seal the outer edge portion of the lower fastening arm on the drainage panel carried thereabove.  
   
   
       5 . The drainage system of  claim 1  having a plurality of spaced fasteners extending through the body of the fastening brackets and into the supporting joist with a grommet carried about the fasteners on at least one side of the body of the fastening brackets to seal the orifice in the body through which the fasteners pass.  
   
   
       6 . The drainage system of  claim 1  wherein the fastening brackets further have an elongate strip of adhesive sealant material carried by the joist facing side of the body of each fastening bracket, said adhesive sealant material covered by a removable protective cover extending over the exposed surface thereof.