EN-V can be installed over many different substrates. However, the substrate must be able to hold a fastener. For example, 5/8″ plywood can hold a fastener, but fiberglass gypsum sheathing cannot. Therefore, when using fiberglass gypsum sheathing a sub girt must be installed onto the substrate horizontally for the attachment of panels. Additionally, a weather barrier must be used under all EN-V panels.