Prevent Damp and Condensation in a Shipping Container, Caravan or Boat with a Dampstick
The Dampstick is aimed at cheaply reducing damp and condensation that may occur in relatively small and confined areas such as Shipping Containers…
Very simply, Damp and Condensation can form when warm air holding water in a vapour, cools down and that cooler air can no longer hold the same amount of moisture. This moisture collects on a cold surface in very tiny ,tiny, droplets almost a mist ( that’s the mist you see on your windows ) and those tiny, tiny droplets joins hands to form even bigger droplets that can then start running down your walls or windows or dripping off the ceiling or they quickly get absorbed into the nearest water absorbing material. If the air warms up again these droplets are again transformed back into vapour which is then held in the air, returning back into droplets when the air cools again. In a Shipping Container for example or a tin roofed shed, the most usual place for these droplets to meet up is on the ceiling which is usually the first coolest place and these droplets may run to the lowest area of the ceiling and form dripping points. This can keep happening every day its like a micro rain cycle, the result is the top of your stored items gets damp regularly and in the worst cases some areas get sodden and start growing bacterial fungi things or black spots!
Damp and Condensation can occur in areas as big as aircraft hangers and does, if you go into an aircraft factory or airport hanger they are always kept warm but that is another scenario.
Dampness can occur in the same sort of manner but instead of condensating, the humid atmosphere is absorbed by materials that are drier than the humidity that surrounds it .Dampness can also be caused by direct transfer and capillary attraction as in rising damp in walls and floors, this will need to be tackled by measures other than The Dampstick.
Where does the airborne moisture come from … well Primarily it is already in the AIR and of course everything organic has moisture in it, Paper, and more especially Cardboard has loads !, Fabrics, Materials, Books, Soft Furnishings, Bedding! Mattresses! Carpets! Wooden Pallets, and your Breath generates a lot (think, cave paintings, in a dry stable atmosphere they lasted thousands of years, then they get discovered, the public go and look at them, and they start deteriorating).
What about ventilation and air flow … yes if sufficient air is allowed to flow around your goods and its dry and not wetter than the air its replacing there is a modicum of control, but how do you get that balance and if the air is from outside it can be wetter on some days than the air its replacing and it may not condensate, but it will make all the materials that can absorb that moisture damp!