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What is the Best Wood for a Sauna?

Best Wood for a Sauna

Saunas have been cherished for centuries, offering a variety of health and relaxation benefits. The heat, the tranquility, and the soothing ambiance of a sauna are largely created by the materials used in its construction, with wood playing the most crucial role. But not all woods are created equal when it comes to building a sauna. From the heat resistance to the aesthetic appeal, selecting the right wood is paramount in creating the ideal sauna experience. In this blog post, we’ll dive into the best wood for saunas, focusing especially on cedar, and explore why it is the top choice for both traditional saunas and modern cedar barrel saunas.

Why Wood Type Matters for Your Sauna

The primary function of the wood in a sauna is to handle high heat and moisture levels. A sauna’s temperature typically ranges from 150°F to 195°F (65°C to 90°C), with some reaching even higher temperatures in specific instances. The wood needs to be durable, heat-resistant, and comfortable to touch. Not only does it need to withstand the heat and steam, but it also needs to be pleasant to the senses — sauna goers spend extended periods of time in close contact with the wood.

Some woods, particularly softwoods like cedar, are naturally more suited for these conditions. On the other hand, harder woods like oak can be too dense and heat-absorbing, causing the wood to become uncomfortable to the touch. Additionally, the wrong type of wood can lead to issues like warping, twisting, or off-gassing of toxic substances, which can make your sauna experience less enjoyable and potentially hazardous.

The Case for Cedar Sauna Wood

When it comes to selecting the best wood for a sauna, cedar stands out as the top choice for several reasons, particularly in the creation of both traditional and modern cedar barrel saunas. Here’s why:

Heat Resistance and Comfort
  1. Heat Resistance and Comfort

Cedar is a softwood, meaning its fiber structure is light and fibrous. This characteristic allows it to resist heat absorption, unlike harder woods such as oak, which can trap heat and become extremely hot to the touch. In a sauna, this means that the cedar wood stays relatively cool even at high temperatures, making it much more comfortable for sauna-goers to lean against or touch without risk of burns.

This heat-resistant quality makes cedar an ideal material for both traditional cedar sauna rooms and outdoor cedar barrel saunas. Even in environments where temperatures soar to 180°F or higher, cedar remains inviting and safe to touch, while harder woods can become unbearably hot.

  1. Natural Aroma and Relaxation

One of the most unique and beloved features of a cedar sauna is its natural aroma. Cedar emits a distinctive, pleasant scent that enhances the sauna experience. The natural oils within the cedar wood release a soothing fragrance when heated, which is both calming and refreshing. This is a feature that cannot be matched by other types of wood. In fact, many people choose a cedar barrel sauna specifically for the aromatic experience it provides, as it encourages deep relaxation and stress relief.
  1. Durability and Resistance to Decay

Cedar is naturally resistant to decay, making it an ideal choice for a sauna’s high-moisture environment. The sauna’s constant exposure to heat and humidity can quickly break down certain woods, especially those without natural decay resistance. Cedar’s high concentration of aromatic oils provides a natural safeguard against mold, mildew, and rot, ensuring that your cedar sauna will remain in top condition for years to come, with minimal maintenance required. This feature is especially important here, where they are often used in outdoor sauna settings where exposure to the elements is a factor. The durability of cedar helps preserve the structural integrity of the sauna, whether it’s placed in a backyard or by a lakeside.

Why Not Other Woods?

While cedar is the clear choice for saunas, it’s helpful to understand why certain woods should be avoided. These types of wood either do not handle the heat and humidity of a sauna well or can even pose health risks. Here’s a look at a few woods to steer clear of when building or purchasing a sauna.
  1. Pine and Other Sappy Woods

Sappy woods like pine are a definite no-go for sauna construction. While pine might be readily available and inexpensive, it releases sap and oils when exposed to the high temperatures of a sauna. This sap can create a hot tar-like substance that can burn the skin upon contact, making the sauna experience uncomfortable and potentially hazardous. Moreover, the sap can off-gas at elevated temperatures, releasing unpleasant fumes that can cause headaches or nausea. These fumes can also interfere with the overall experience, detracting from the tranquility and relaxation a sauna is supposed to provide. Pine is best avoided for both traditional cedar saunas and cedar barrel saunas.
  1. Hardwoods Like Oak and Maple

While hardwoods like oak and maple might seem like suitable choices for sauna construction due to their dense grain and aesthetic appeal, they are not ideal for sauna environments. These woods are very heat-absorbent, which means they can become extremely hot to the touch, making them uncomfortable to lean against or touch during sauna use. Furthermore, because they are denser, they take longer to heat up and cool down, making it difficult to maintain a consistent sauna temperature. Additionally, dense hardwoods like oak are more prone to warping and cracking due to their higher moisture content, which can cause unsightly damage over time. This is not an issue with cedar, which is naturally stable and resilient even under fluctuating humidity and temperature conditions.
  1. Cheap Softwoods Like Hemlock and Aspen

While hemlock and aspen may be cheaper alternatives, they do not possess the same qualities that make cedar an ideal sauna wood. These woods are more prone to warping, and their fibrous structure is not as resilient as cedar’s. Hemlock and aspen can also release unpleasant odors when exposed to heat, detracting from the serene sauna experience. Although these woods may be more budget-friendly, they simply don’t provide the same durability, comfort, or overall experience as cedar.
Heat Resistance and Comfort

The Importance of Knot-Free Wood

When selecting wood for your sauna, whether it’s a traditional cedar sauna or a wood fired sauna, one key consideration is to ensure the wood is knot-free. Knots in wood are denser than the surrounding fibers, meaning they expand and contract at a different rate when exposed to heat. This uneven movement can cause the wood to warp, crack, or even cause the knots to fall out, leading to structural instability and an unattractive appearance.

To maintain the integrity of your sauna and ensure long-lasting performance, always opt for high-quality, knot-free wood. Cedar is often available in high-quality, kiln-dried forms that are free of imperfections, making it the best choice for a sauna.

When building or purchasing a sauna, whether it’s a traditional cedar sauna or a modern cedar barrel sauna, choosing the right wood is essential to creating the perfect sauna experience. Cedar offers the ideal balance of heat resistance, durability, pleasant aroma, and aesthetic appeal. It resists decay, stays cool to the touch even in high temperatures, and provides the aromatic, soothing qualities that many sauna lovers cherish.

Avoid woods that are dense, sappy, or inexpensive, like pine, oak, or aspen. Instead, choose high-quality cedar, and you’ll ensure that your sauna experience is both relaxing and long-lasting. Whether you’re investing in a cedar barrel sauna for your backyard or a custom-built cedar sauna for your home, cedar is undoubtedly the best wood for creating an ideal sauna environment.

See our technical specifications and sauna features for a full rundown of all the high quality and long-lasting materials that go into each and every one of our cedar saunas.