Louvers should be installed with galvanized fasteners and urethane adhesive. Most commonly the louvers are secured through the brick moulding. The urethane adhesive should be applied in a 1/4 bead about 3/8″ from the outside edge of the louver and squeezed out to the edge and act as a caulk and sealant to prevent water seepage when the louver is secured with fasteners.
All open louvers may allow water seepage during severe weather conditions. Melton Classics recommends installing a flash pan to catch any water seepage. This can be fashioned out of sheet metal or coil stock and fastened in position before louver installation.
