Sauna is not just a ritual, it is also a science. And the key to success lies where we least expect it: in the right choice of materials. in the sauna stones. It is the stones that are the heart and soul of the sauna, responsible for the accumulation of heat and the gentle, abundant steam. If you are planning to build a new sauna, or simply want to update your old stove, this guide will help you choose the best sauna stones, which will last a long time and ensure a flawless sauna experience.
Why is the quality of the stones most important for a sauna stove?
More than 80% sauna pleasure depends on the quality of the steam, and it is directly determined by stones for saunas. Poor quality, porous, or improperly selected stones can not only store heat poorly, but also pose a danger - they can split and crumble, which is especially dangerous for electric stoves.
How to Choose Sauna Stones: Key Criteria
When choosing sauna stones, always consider three essential factors:
- Density and Mass: The denser the stone, the more heat it stores and releases more slowly. Dense stones ensure an even and long-lasting steam supply.
- Resistance to Temperature Changes (Thermal Resistance): Sauna stones are constantly heated to several hundred degrees, and when filled with water, they experience a sudden cooling. The stones must not crack or crumble.
- Chemical Composition: The stones must not emit harmful substances, odors or dust. Only non-polluting stones of volcanic origin are suitable for the sauna environment.
The Most Popular Types of Sauna Stones (And Their Benefits)
There are many different options on the market, but only a few types are considered the best. Let's take a look at the most popular ones. types of sauna stones:
Olivine Diabase Stones
Olivine diabase is the benchmark choice and is often cited as the most reliable sauna stones. Why? They have an extremely high density, excellent heat capacity and are almost non-porous. They rarely break down and withstand thousands of temperature cycles, making them perfect for both electric and wood-burning stoves. It is because of these properties olivine diabase stones are recommended by many sauna specialists.
Volcanicite and Peridotite
These are excellent alternatives, also characterized by high density. Vulcanite (or loose-fill) is easily recognized by its dark color and coarse structure. They absorb and release heat efficiently. However, when choosing these stones for saunas, always make sure they are specially treated and intended for sauna stoves.
What Stones Are Suitable for Your Oven?
It is important that your choice matches the type of oven. Although all are good sauna stones suitable for a wood-burning stove, electric stoves have specific requirements.
Sauna Stones for Electric Stove
An electric oven requires stones that are particularly dense and do not emit any dust or sediment. Small stone particles that break apart due to thermal stress can damage the oven's heating elements.
- Recommended size: 4-8 cm in diameter. Larger stones can block air circulation.
- Best choice: Olivine diabase or specialized ceramic stones.
Sauna Stones for Wood-Burning Stove
For a wood-burning stove, you can use slightly larger stones (5-10 cm). They can be laid more densely, as the bottom of the stove usually does not heat up as intensely as the heating elements of an electric stove. Large stones help to accumulate a large heat reserve.
Maintenance and Price of Sauna Stones
Even if best sauna stones wears out over time. The stones should be replaced at least once a year. Remove any broken, cracked or dusty stones and replace them with new ones. This maintenance will guarantee the quality of the steam and protect the stove.
Sauna stones price depends on their type and processing. The highest quality diabase or peridotite stones are more expensive, but their durability pays off. By investing in quality stones, you are investing in the comfort and safety of your sauna.
With the right choice sauna stones and with regular maintenance, you will be able to enjoy impeccable steam and a great relaxation ritual for many years. Most importantly, remember the criteria – density, durability and suitability for your stove!
Frequently Asked Questions (FAQ)
When should sauna stones be replaced?
Most professional stones (e.g. olivine diabase) should last 3-5 years, depending on how much you use them. Do you feel like your stove is heating up faster, but the steam quality is getting worse, and the stones look dusty or cracked? This is a sign that it's time to replace at least some of the stones.
Can I collect sauna stones myself in nature?
Categorically not recommended. Stones collected from rivers or fields may contain minerals that release harmful gases when heated (e.g. limestone), or have pores where moisture, if suddenly evaporated, could cause the stone to explode in the sauna. Always use specialized, certified sauna stones.
What is the optimal size of stones and how to place them correctly in the oven?
For electric stoves, the optimal size is 4–8 cm. For wood-burning stoves, 5–10 cm. The rule of thumb is to place larger, more solid stones at the bottom to ensure stability and allow air circulation. Place smaller stones on top, which are better suited for pouring water. The stones should not be placed too densely, as this will block the flow of hot air.