Humidity: Why is it essential and how can it be regulated?

Humidity in a wine cellar: why is it essential and how can it be regulated?

When it comes to preserving wine, we often talk about temperature, but one of the most fundamental - and often overlooked - parameters ishygrometry, i.e. humidity levels. A high-performance wine cellar doesn't just maintain a constant temperature: it must also offer the right level of humidity. Too low and wine oxidizes. Too high, and it risks mold. Here's why humidity is crucial, and how to control it effectively in your wine cellar.

1. Why is humidity so important?

Humidity in a wine cellar has no direct impact on the wine contained in the bottles... but it is decisive for the cork's preservation quality.

Role of the cork :

• It protects the wine from external oxygen.

• It allows slow micro-oxygenation, favorable to aging.

If the air is too dry:

• The cork dries out, becomes porous and lets in too much air.

• As a result, the wine oxidizes prematurely, losing its aromas and structure.

If the air is too humid:

• Labels deteriorate.

• Mildew can appear on corks and racks.

2. What is the ideal humidity level in a wine cellar?

The recommended humidity level is between 60% and 75%.

• Below 50%: too dry an environment, risky for corks.

• Above 80%: possible fungal growth, corrosion and aesthetic deterioration.

Aging wine cellars Climadiff are designed to maintain this ideal hygrometry, thanks to a combination of integrated technologies.

3. How to regulate humidity in a wine cellar?

a. Use of lava stone (or humidification box)

Some models, notably ageing cellars Climadiff, are equipped or compatible with a box containing a lava stone:

• Lava stone naturally stabilizes humidity in the ambient air.

• Regular humidification is all that's needed to maintain its effectiveness.

• It acts as a hygrometric buffer, absorbing or releasing humidity as required.

b. Positioning in the room

• Avoid rooms that are too hot or too dry (near a radiator, or in a veranda in winter).

• Choose a temperate environment, with little climatic variation.

c. Hygrometer monitoring

We recommend installing an internal hygrometer (integrated or independent) to monitor the actual humidity level inside your cellar.

4. Built-in technical functions Climadiff

Some top-of-the-range Climadiff cellars incorporate electronic hygrometry control systems, combining :

• Natural or forced ventilation,

• Absorbent interior lining,

• Accessories compatible with lava stone.

In addition, solid doors offer better thermal and hygrometric inertia, making them ideal for ageing cellars.

5. What to do in case of hygrometric imbalance?

Conclusion

Humidity is as essential a parameter as temperature in guaranteeing optimal preservation of wine bottles, especially in ageing cellars. Thanks to proven technologies and specific accessories, our cellars Climadiff cellars make it possible to control humidity to preserve the integrity of the corks, and therefore the wine, over the long term.