DIY dehumidifier

After encountering some damp in Freya’s wardrobe, we found a small crack in a cable gland which we believe to be the point of entry for moisture. We have resolved this with some sealant, but to be extra safe we made a small dehumidifier to stand in the bottom of the cupboard. There are a couple of super simple ways to do this, so we thought we’d share them with you.

Rock Salt

You know how sometimes salt becomes clumpy in the shaker? This is because salt is a natural desiccant and absorbs moisture in the air. That’s why salt makes such a great natural dehumidifier.

The salt will absorb moisture till it’s saturated and then the moisture will drip through into the container. Although all salts are natural desiccants, it’s better to use rock salt, as the larger granules allow damp air to pass through more easily, thus allowing it to absorb moisture more efficiently.

How frequently you will need to empty the water will depend on how much damp is in the air. The salt should also be changed occasionally.

To make the dehumidifier all you need is a container and sieve type object that will sit on top to hold the salt. Here’s a DIY version we came up with that can be made out of household waste, and, it only requires three items! They are:

  • A jar
  • An elastic band or piece of string
  • An old stocking or piece of cloth

To assemble simply:

  1. Cut the foot off of a stocking.
  2. Stretch the stocking foot over the jar (leaving some slack).
  3. Secure it with a rubber band.
  4. Fill it with rock salt.

Here’s our finished salt dehumidifier:

It’s really simple and you can make different sizes with different containers and cloth sizes. We only needed a small one for our tiny wardrobe.

If you’d rather not get into making one, there are plenty of common items that will also do the job nicely. Here are a few examples that can be used with a bucket or other container:


Coal is also a good one for absorbing moisture.

To make this type of dehumidifier:

  1. Find a suitable sized container with a lid, such as a coffee can, plastic container, painter’s bucket, etc.
  2. Poke several holes in the lid of your container.
  3. Fill your container with charcoal briquettes.

That’s it. Just replace the charcoal briquettes every few months. And, the old briquettes are still perfectly fine to use for burning.



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