Ventilation in the garden house – possibilities and reasons for sufficient fresh air supply

When you open your garden house, do bad smells meet you? Then you should act urgently. After all, that’s a sign that you’re airing wrong.

Ventilation in the garden house
© A. Shea Tree –

A garden house is much more than just a storage room for garden tools, bicycles and the like. Here you can make yourself comfortable, celebrate and even stay overnight. Provided you pay attention to a few important points. Because only if you ventilate the garden house correctly will you enjoy it for a long time. If you don’t pay attention here, you can quickly experience an unpleasant surprise.

The biggest enemy in the garden house: moisture

Those who open the doors of the garden house in spring usually hold their breath. Because rising dampness creates a musty room climate in the garden house during the winter. And as if that weren’t enough, the moisture also affects everything stored in the garden house. Of course, the garden house itself is not spared either. If you don’t ventilate it properly during the cold and wet seasons, you won’t be surprised by mould, unattractive discoloration and moisture damage. It is actually not so difficult to ventilate the garden house properly and to protect it from moisture damage and the like.

How to ventilate a garden house

❶ Open windows/doors:

© kolotype –

Ventilation is simply the be-all and end-all in a garden house. No matter whether you use it as a living room or hobby room or only store garden tools and furniture in it. So take care of it and ventilate the garden house regularly. If you spend several hours in it, e.g. because you pursue your hobby, you should air it for about 10 minutes every hour. You should open all windows and doors completely so that an air exchange can take place quickly without losing much of the heat. This airing is important because you don’t believe how much moisture a person produces by breathing and sweating.

If you use the garden shed as a storage area for garden tools, furniture, etc., it is sufficient to air the house about three times a week. It is important that you do not place the appliances and furniture too close to the walls of the garden house so that they can be well ventilated.

If your garden (equipment) house has only one door, you should think about the subsequent installation of a roof hatch. So you can ventilate the garden house without having to worry that someone will go in there and maybe even steal something. On top of that, a roof hatch also provides much more light in the garden house. The best thing is that the installation is relatively simple. For example, I found a tutorial for this on . Here the installation is explained to you step by step.

I found an interesting post on about “Correct ventilation” in American. Among other things, you will also learn why shock ventilation is better than continuous ventilation.

❷ Ventilation grille:

ventilation grille
© mueduer –

Another way to protect the garden house from moisture and mould is to install ventilation grilles. Here it makes sense to mount two ventilation grilles on two diagonally opposite sides of the garden house. Once at floor level and once at roof height. The garden house is thus optimally ventilated. The assembly is here again a piece of cake. You just have to

  1. mark the size of the ventilation grilles,
  2. drill a hole in one of the corners,
  3. saw out the marked openings with a jigsaw
  4. and screw on the ventilation grilles above the cut-outs.

In this way you ensure continuous ventilation in your garden house. A simple, yet very effective ventilation option.

❸ Solar fan:

solar fan
© hobitnjak –

But you can also install a solar fan (also called exhaust fan) at the garden house. As the name suggests, the solar fan automatically ventilates the garden house in direct sunlight without any house electricity. It can be used for both ventilation and exhaust. Two extra rotor blades are supplied for this purpose. So musty smells, condensation and mould have no chance.

The installation of a solar fan is not so difficult at all. You can easily mount it on the outside wall of your garden shed. You only have to make sure that the photovoltaic cells point upwards so that the solar radiation can be used optimally. The opening for the air transport thus points downwards. This prevents rainwater from entering the garden house.

The solar cells also work when it is cloudy. The performance of the solar fan is then not as strong as in sunshine, but still the power is sufficient to run the fan for several hours. How such a solar fan looks like and how it works, you can look at for example on


Don’t wait until a humid climate has spread in the garden house and mould, mould stains and bad odours have spread. Provide much more and already think about ventilation possibilities when planning the garden shed or buying the garden shed.

Don Burke

I am Don Burke, one of the authors at My Garden Guide.  I am a horticulturist that cultivates, grows, and cares for plants, ranging from shrubs and fruits to flowers. I do it in my own garden and in my nursery. I show you how to take care of your garden and how to perform garden landscaping in an easy way, step by step.I am originally from Sydney and I wrote in local magazines. Later on, I have decided, more than two decades ago, to create my own blog. My area of specialization is related to orchid care, succulent care, and the study of the substrate and the soil. Therefore, you will see many articles dedicated to these disciplines. I also provide advice about how to improve the landscape design of your garden.

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