Abstract: The present invention provides a water management building wrap that may be useable between a frame structure of a building and an exterior building covering. In at least one embodiment, the building wrap comprises a permeable membrane and an extruded polymeric drainage structure secured to the second side of the membrane. In at least one embodiment, the drainage structure includes a plurality of generally vertical members having a first thickness and forming boundaries for generally vertical water drainage channels, and a plurality of generally horizontal members attached to the generally vertical members and having a second thickness less than the first thickness and forming integral joints at intersections of the generally vertical members and the generally horizontal members that provide dimensional stability to maintain the orientation of the generally vertical members and form stable vertical water drainage channels.

Abstract: In at least one embodiment, the present invention provides a biaxially oriented extruded netting. The netting comprises a plurality of interconnected strands with at least some of the strands comprise a HDPE composition comprising a plurality of interconnected strands, with at least some of the strands comprising a composition comprising HDPE. In at least certain embodiments, the net has a strength-to-weight ratio of at least 2.0 lbf/(in.×PMSF). In at least one embodiment, at least 50% of the strands are made of the HDPE composition. The present invention also relates to a method for making biaxially oriented extruded HDPE netting. The method comprises extruding strands of polymer material to form a netting wherein at least some of the strands are formed of the HDPE and biaxially orienting the netting.