Delta-Fassade S is a UV-resistant water-resistive barrier from Cosella Dörken for open-joint cladding systems. It is composed of a highly tear-resistant polyester substrate with a waterproof coating and can be installed in back-vented cladding systems featuring open joints up to 2" wide and open joint areas of up to 40% of the entire surface. Other benefits include high vapor permeability (74 perms), easy installation, and the ability to be used in metal stud construction. Delta-Fassade S is also suited for use as a windproof water-resistive barrier in renovation projects.