All our containers are “cargo worthy” and wind and water tight. Sometimes it may appear a container is leaking when, in fact, it is condensation. Condensation happens one of two ways: Either the air is cooled to its dew point or it becomes so saturated with water vapor that it cannot hold any more water. Lack of ventilation and humidity control is what makes containers condensate. Typically, the container is not humid unless moisture is introduced into the container and then the door is locked. If you are in and out of it a lot on a humid or rainy day and you shut the doors you have essentially locked that moisture in the container and created a mini weather system. Usually condensation is not an issue in the warmer months. It is worse when there is a large swing in temperature.