What do you put under an indoor sauna?

When it comes to creating an indoor sauna, there are many factors to consider. One of the most important is what to put under the sauna. This may seem like a minor detail, but it can actually have a big impact on the overall experience and longevity of your sauna. In this blog post, we will explore some of the options for what to put under an indoor sauna and the pros and cons of each.

1. Concrete Slab

One of the most common options for what to put under an indoor sauna is a concrete slab. This is a solid, level surface that provides a stable foundation for your sauna. Concrete slabs are durable, easy to clean, and can withstand high temperatures. They are also relatively inexpensive and can be poured in any size or shape to fit your specific needs.

However, there are some downsides to using a concrete slab. Firstly, it can be difficult to install if you don't have experience working with concrete. Secondly, it can be hard on your feet and joints if you plan on using the sauna without any type of mat or cushion. Lastly, if the concrete slab is not properly insulated, it can lead to heat loss and higher energy bills.

2. Wooden Platform

Another option for what to put under an indoor sauna is a wooden platform. This is a raised platform made of wood that provides a more natural and comfortable surface than concrete. Wooden platforms can be customized to fit any size or shape of sauna and can be stained or painted to match your decor.

The main advantage of using a wooden platform is that it is more comfortable to stand on than concrete. It also provides a more natural look and feel that blends well with the sauna environment. However, wooden platforms require regular maintenance to prevent rot and decay. They are also more expensive than concrete slabs and can be more difficult to install.

3. Rubber Mat

If you are looking for a simple and affordable option for what to put under an indoor sauna, a rubber mat may be the way to go. Rubber mats are soft, durable, and easy to clean. They also provide good traction and cushioning for your feet.

The main advantage of using a rubber mat is that it is easy to install and requires no special skills or tools. It is also relatively inexpensive and can be cut to fit any size or shape of sauna. However, rubber mats are not as durable as concrete or wood and may need to be replaced more frequently.

4. Tile or Stone

For a more luxurious and upscale look, you may want to consider using tile or stone under your indoor sauna. These materials provide a beautiful and durable surface that is easy to clean and maintain. They also add value to your home and create a spa-like atmosphere in your sauna.

The main disadvantage of using tile or stone is that it can be expensive and difficult to install. It also requires regular maintenance to keep it looking its best. Additionally, tile or stone can be slippery when wet, so it may not be the best option if you plan on using the sauna while wet.


In conclusion, there are many options for what to put under an indoor sauna. The best choice for you will depend on your specific needs and preferences. Concrete slabs are durable and affordable, wooden platforms provide a natural look and feel, rubber mats are easy to install and affordable, and tile or stone offer a luxurious and upscale look. Consider these options carefully before making your final decision, and enjoy your new indoor sauna!
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