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It's Bone Dry Condensation Trap

No matter what anybody else tells you, if you are storing any items in a standard shipping container that is placed outside and exposed to the normal European elements, You are susceptible to condensation occurring inside the container, which will more often than not collect on the ceiling.

What causes this, a standard shipping container is just a metal box which is quickly affected by ambient temperature changes. When the container is warm, the atmosphere inside the container can become humid. This humidity can materialise from a variety of sources for example… Water trapped in the 27mm ply container floor, most likely within Used Shipping Containers, or Water trapped in the items being stored , bedding, sofas dishwashers, washing machines and more surprisingly cardboard cartons ! All of these hold moisture to some degree.

This humid atmosphere
When cooled during the evening, will form water droplets, usually on the coolest place the ceiling, which can then, when the droplets are large enough drip onto your stored items. If this is not attended to, you will get over a period, a micro rain cycle, causing mould and water damage, which can wreak your stored items.

How to Easily Combat this.

1/DampStick Condensation Control Poles
Always, always use these. They remove the dampness in the atmosphere before it becomes condensation, They are cheap, in the region of £22 each and will last approx 3-6 months (depending on humidity values within the container), and they really work well in conjunction with commonsense activity, i.e. do not attempt to store very wet items, keep the door closed on wet and humid days and tape off container vents (see for details).

2/ Grafo
This is a dry material sprayed to the container ceiling.
It traps any condensation that may form and will cost IRO per 20'
£180-00. 40’ £320-00 (see )

3/ Foil Encased Bubble Wrap.
This is a really cheap method of insulation and is very effective , it is stuck to the container ceiling and walls. Its downside is, it is prone to tearing if treated badly, Cost IRO per 20’ £210-00. 40’ £344-00.
3a/ 2mm PVC fluted crash panels, set at waist height will help prevent damage by abrasive tearing, cost IRO 20’£42-00 40’£72-00.

4/ Pentalver Insulated Panels
This involves lining the whole container with 25mm to walls & 50mm to ceiling of Polyisocyanurate (PIR)Insulation panels that are faced with either Ply Wood or 3mm MDF Melamine faced cost IRO per 20’ £1220-00 40’ £2167.00

5/ Aluminium Barrier Foils.
Laid to floor to prevent dampness
Trapped in Ply Floor being transferred to atmosphere by evaporation.
Only really applicable when using Used Containers, New Build Containers normally have Kiln Dried Ply Floors.

Cost IRO per 20’ £56-00, 40’ £112-00.


Would be by using electric self draining dehumidifiers which are readily available from DIY stores, or a good quality commercial unit is manufactured by Munters Ltd see

NB. IRO = In Region Of.

Prices may vary according to region and supplier.

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