I'm interested in using insulated vinyl siding on a remodel project, more for the rigidity then the thermal value which is negligible. One of the major benefits of standard vinyl siding is the "built in" rainscreen. I'm concerned that insulated vinyl siding will not drain/dry well and the plywood sheathing will remain damp longer. Literature from Certainteed, Alside, and PlyGem all state that the EPS has a vapor permeance of 5 and that it's breathable. Is this a real concern? Are there any moisture horror stories with insulated vinyl?