How to protect stuff from damp in my shed.

by Matt
(Southern England, UK)

John, I have a shed provided by our housing association. It's basically a long block, brick built building, that has been split into 6 sheds that have a concrete base. Each brick shed has a wooden door. I think the roof is possibly a type of concrete covered in roofing felt. There's no ventilation I can see, other than the fact that the door doesn't sit perfectly in the frame.

In the shed, I currently store my bass amplifier, which has a paper cone (15inch). I've made a plastic cover for it but am obviously concerned about damp. The reason I don't keep it inside the flat is that it weighs 50kg and I'm on the 4th floor, and there's no lift.

What can I do to improve the damp proofing in the shed, that doesn't involve structural work (which we're not allowed to do)? I wondered if I could build an insulated frame sitting inside the shed - plastic membrane on the floor, thin insulation on the walls and door?

Any help much appreciated.



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Aug 10, 2014
Protecting your equipment from the damp
by: John

Hi Matt,

Thank you for your question. Three things that will help to lengthen the life of anything that you are storing in your shed are temperature, ventilation and humidity.

It sounds like you may not have power to this shed as it is basically a brick shell so heating it does not sound like much of an option. If you did have power I would recommend insulating the shed to minimise the power usage. Increasing the temperature would encourage any damp to evaporate but this would also require ventilation.

Ventilation - installing some sort of wind driven fan or a small battery operated fan (possibly with solar recharging?) would encourage a through flow of air and so help to prevent pockets of stale air where mildew could thrive.

The final option is to reduce the humidity. The normal route for this would be to use a dehumidifier , however as you may not have power to the shed then the powered route is not an option.

Another possible solution,, depending on how often you use this amplifier, would be to create an air-tight container/box to store it in. You could then place the amplifier in the box with some dessicant crystals which would absorb any remaining moisture in the air. Over a few cycles the dessicant crystals would become saturated with moisture, but they could be regenerated in the oven to burn off the absorbed moisture. To make the crystals last as long as possible the volume of the box should match the size of the amplifier as closely as possible.

This is the same sort of approach that suppliers of electronic equipment use when they insert those small sachets of crystals into the packaging of new electronics.

I hope that the above suggestions give you some food for thought.


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