An elongated strip of extruded plastic or roll formed metal material includes a rear securing plane that inserts beneath a roofing membrane of a building structure. The rear plane integrally connects to a reversed curved surface arranged longitudinally witch connects to a forward extending perforated second plane by means of a channel, one of two channels, which additionally serve to receive and secure a lateral edge of a filtration membrane. The perforated second plane contains intrinsic and intersecting vertical water directing planes that extend above and beneath the surface of the second plane and which serve to support and contact an overlying insertable filtration membrane. The second plane interconnects to a forward extending plane by means of a channel that serves to receive and secure a lateral edge of a filtration membrane. The plane connects to a second plane by means of a downward extending channel. The second plane rests on the top front lip of a k-style gutter and is adjoined by a downward angled plane the first reverse curve plane serves take the brunt of the rain to disallow roof water runoff from contacting the front face of a k-style gutter. A combination of a reverse curve and a filtration membrane configured for water permeability and debris repellency resting on vertical planes serves to break the forward flow of water, at points of contact between the reverse curve plane and filtration membrane, and also serves to further channel water downward through an underlying perforated plane into an underlying rain gutter. The filtration membrane is readily inserted into the channels existing on the forward and rear edges of a perforated first plane.
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