No matter what most people say, storing items in a standard shipping container, that is exposed to the elements, does not necessarily mean that your items will be safe from moisture issues. You are still susceptible to dangers from condensation inside the container itself, which will collect on the ceiling and walls, trickling down due to differences in temperature, endangering the items you placed inside. This humidity can appear due to a number of reasons, mostly being trapped under the plywood container floor or due to already being present inside, being present in the items being stored and so forth. Humidity in the atmosphere will also play a part in the process, but there are ways you can get around it.

When temperatures cool off during the evening, water droplets will often form inside containers due to condensation, most often on the ceilings due to the difference between the outside and inside temp.  If you don’t do anything about it your storage area will likely develop quite a bit of a moisture problem.

Dampstick Condensation Control Poles

You can make use of this to remove the dampness from the air before it condensates. They are fairly cheap and easy to use, lasting for at least three months at a time, depending on the humidity levels inside the container itself. You should still keep some common sense things in mind however, such as avoiding the storage of wet items or opening the doors or rainy days if possible, as well as taping off the container vents if it has any.


Another material you can use that can be applied by spraying it onto the container ceiling itself. It helps trap any condensation that forms, but it is still pretty costly to deal with in the long run.

Foil encased bubble wrap

This is a cheap, effective and easy way of insulation, as it will be applied to the ceiling and walls of the container. Unfortunately, it tends to be pretty easy to tear so you will need to take great care when you work with it. It is fairly cheap as well, so this makes it a good choice for most storage.

Insulated panels

This will allow you to line the entire container with some 25mm or 50mm wall to ceiling and the entire ceilings insulation panels made of plyisocyanurate, which can also be faced with plywood or MDF for an affordable cost. It will eliminate the condensation problem, but it would take quite a bit of work to pull off.

When all is said and done, you would still need to focus on choosing the right insulation for the right storage purposes. For example, if you plan on storing a lot of items of irregular shapes, then the insulation will need to be strong and sturdy, so think ahead and act accordingly during your preparations. Mobile Self Storage Canary Wharf can help you with more home storage ideas.