Hunter Panels’ Xci Aegis Wall System pairs polyiso foam with structural sheathing, a glass facer, and a weather-resistive barrier (WRB). The new Xci panels are available with standard plywood or OSB (Xci NB) or fire-rated ply (Xci Ply and Xci Class A). These are fastened to framing and then the panels are covered with Xci VP-SA WRB—a vapor-open, self-adhering WRB—to protect seams and fastener penetrations. Contact a local distributor for pricing.