Patent ID: 8959839
Filing Date: 2015-02-24
Classification: E04D

Abstract:
1. In combination with an existing heat weldable, thermoplastic roof covering affixed to a generally flat or low pitch roof which abuts a parapet, the parapet defining at least one interior corner and a scupper-connected, parapet-penetrating opening spaced apart therefrom, the roof covering extending upwardly onto the parapet and being securely attached to portions thereof which are disposed contiguous with the roof and intersect at said interior corner, a barrier which comprises: (a) a sheet-like, triangularly-shaped membrane having first, second and third elongated sides which are heat welded along the entire length of each side to the existing covering so as to form first, second and third continuous watertight seals, respectively, the watertight seal thus formed between each side's distal ends being an integral part of a longer continuous watertight seal, likewise formed by heat welding the membrane to the existing covering, which extends in a continuous loop proximate with the membrane's outer periphery; (b) the first and second elongated sides, which are oriented perpendicularly to each other proximate with the interior corner, extending downwardly therefrom until they reach widely spaced apart points along the parapet/roof joint, one of said widely spaced apart points being located in close proximity to said parapet-penetrating opening and the other being separated therefrom by the span of the membrane's third elongated side; (c) the membrane and the existing covering defining an enclosure bounded by the longer continuous watertight seal, the membrane defining at least one charging slot which is spaced apart from the longer continuous watertight seal and is connected to the enclosure; and (d) a solidified spray foam filling, formed by feeding spray foam-generating chemical agents, in their respective liquid states, through the charging slot and into the enclosure, the spray foam filling being disposed inwardly of the longer continuous watertight seal; the solidified filling, once the enclosure has been filled to substantially its full capacity with it, having an overall shape which, if the solidified filling were cut straight through horizontally, would be generally triangular in transverse cross-section, with each transverse cross-section so cut being generally larger in size than any such transverse cross-section disposed upwardly of it, thus giving the membrane-covered, solidified filling a facade, disposed inwardly of the interior corner, which slopes downwardly and away from both of the corner's intersecting vertical faces, so that storm water which would otherwise fall onto the roof near the corner and/or flow across the roof towards it is instead intercepted by the facade and funneled along its base directly into the parapet-penetrating opening.