Thank you for your feedback. The EMCO 100 Self-Storing Storm Door is ventilating storm door. During certain weather conditions, water may drain out between the windows depending on the exposure. Please note that storm doors will not be a complete barrier to water or air infiltration as it only reduces the exposure to the entry door. However, if the windows are installed incorrectly, there will be a high chance of water infiltration. Kindly call our Solution Center at 855-337-8822 so we can assist you. Please have the serial number ready when you contact us. You will find it anywhere on the hinge part, on a white or silver sticker. - Charmaine