What Wood Is Used in Saunas and How to Choose the Best

Saunas are a great way to relax and unwind, but have you ever wondered what type of wood is used to build them? Cedar is a popular choice for sauna construction due to its natural resistance to rot and insects.

Western red cedar is particularly well-suited for sauna use because it has a high concentration of oils that repel moisture and prevent warping. This makes it a durable and long-lasting option for sauna builders.

In addition to cedar, other types of wood like spruce and pine are also used in sauna construction. However, these woods are not as resistant to moisture as cedar and may require more maintenance.

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Nordic Spruce is a popular choice for saunas due to its excellent insulating properties and affordability.

It features a pale, creamy color with a hint of yellow or red, and a straight grain with a fine texture.

However, it may not be the best option for those looking for a wood that's highly resistant to moisture or for a knot-free, uniform appearance.

Nordic Spruce can have visible knots, which can be a disadvantage in terms of smoothness and comfort.

Spruce is one of the most common tree species in the Nordic region and a dominant wood choice for construction and sauna building.

It provides a classic, light-colored sauna interior with a natural Scandinavian feel.

However, spruce can release resin, so choosing properly treated wood is crucial for sauna applications.

Douglas Fir is a highly valued wood for sauna construction due to its strength, durability, and appearance.

It has a beautiful uniform appearance with straight grain and a light brown color that can have hints of creamy yellow or red.

Kiln-dried Douglas Fir timber prevents pitch pockets from seeping resin, making it a great choice for saunas.

Aspen is the most commonly used sauna wood in Sweden, known for its light color, low heat conductivity, and lack of resin release.

It's highly stable against moisture fluctuations and has a smooth, natural surface, making it an excellent choice for sauna panels and benches.

Aspen is also available in thermo-treated (thermo) form, which strengthens the wood while giving it a refined and elegant finish.

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Alder is a popular choice for sauna interiors due to its warm reddish hue and excellent heat absorption properties. It's lightweight, moderately soft, and has good resilience, making it an excellent choice for sauna panels and benches.

Aspen is another classic choice for saunas, prized for its light color, low heat conductivity, and smooth natural surface. It's highly stable against moisture fluctuations and doesn't release resin, making it an excellent option for sauna enthusiasts.

Nordic Spruce is a traditional favorite among sauna builders, valued for its excellent insulating properties and rustic charm. It features a pale, creamy color with a hint of yellow or red, and may have visible knots adding to its natural charm.

Western Red Cedar is a popular choice for outdoor saunas, known for its durability and resistance to decay. It's also great for insulation without becoming hot to the touch, making it an excellent option for those who want a traditional sauna experience.

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Eucalyptus is a great choice for those looking for a durable sauna experience. It's native to Australia but can be found in various parts of the world.

Eucalyptus wood has a distinctive reddish-brown color with a straight grain pattern. It may have some knots, but generally less than other types of wood.

Its durability and strength make it suitable for long-lasting sauna use. This is a significant advantage for those who plan to use their sauna frequently.

Eucalyptus is also known for its pleasing aroma, which can enhance the sauna experience.

Poplar is a popular choice for sauna wood due to its rapid growth and tall stature. It's widely found across the Northern Hemisphere, making it easily accessible.

Poplar has a pale yellow to creamy white color and a straight, uniform grain. This contributes to a smooth appearance with fewer knots compared to other woods like pine.

One benefit of poplar is its resistance to warping and shrinking, which is important in the varying temperatures of a sauna. This makes it a great option for those looking for a low-maintenance wood.

Poplar is also hypoallergenic, making it suitable for sensitive users who may be bothered by the resin released by other woods. This is a great option for those with allergies or sensitivities.

However, poplar is less durable than harder woods, so it may not be the best choice for those looking for a long-lasting sauna wood.

Western and Eastern cedar are two of the most popular options for sauna wood. Western Red Cedar is native to the west coast of North America, stretching from southern Alaska to northwestern California.

This species is known for its beautiful reddish color and very few knots. It's also highly durable and resistant to decay, making it a worthwhile investment.

Eastern White Cedar, on the other hand, is found in eastern Canada and the eastern and central forests of the United States. It's shorter than Western Red Cedar, but replenishes itself every 35 years, allowing for sustainable harvesting.

This species has a pale brown or tan to nearly white color, which turns an elegant silver-gray color over time when exposed to the elements.

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Alder is a great choice for sauna interiors due to its ability to absorb very little heat. It's also lightweight and moderately soft, making it a versatile option.

Aspen is the most commonly used sauna wood in Sweden, prized for its light color, low heat conductivity, and resistance to resin release. It's also highly stable against moisture fluctuations.

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Spruce is a traditional favorite in the Nordic region, providing a classic, light-colored sauna interior with a natural Scandinavian feel. However, it can release resin, so choosing properly treated wood is crucial.

Poplar is ideal for those looking for a hypoallergenic, smooth wood with a clean appearance. It's also resistant to warping and shrinking, making it a great option for saunas with varying temperatures.

Cedar is a popular choice for outdoor saunas due to its durability and resistance to decay. Western Red Cedar, in particular, is known for its beautiful reddish color and is often used for outdoor sauna construction.

Nordic Spruce is sourced from the abundant spruce trees found in the Nordic countries, making it a great choice for those seeking a traditional sauna experience at a reasonable price. It features a pale, creamy color and excellent insulating properties.

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The 11/16" x 4" Western Red Cedar option is a great choice for many projects. This particular type of cedar is surfaced on all four sides with eased edges, which means it's been sanded down to a smooth finish.

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Its actual size is 1 1/2" x 3 1/2", making it a versatile option for various applications. The price tag is $13.95 per linear foot, which can be a bit steep for some budgets.

This cedar is a popular choice among woodworkers and DIY enthusiasts due to its durability and resistance to rot and insect damage.

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Choosing the best wood for your sauna is crucial for creating a healthy and enjoyable environment. The right wood can make a big difference in the ambiance and functionality of your sauna.

Antimicrobial properties are essential for maintaining a hygienic environment in your sauna. Woods with natural antimicrobial properties help reduce the growth of bacteria and fungi.

Durability is also a key factor to consider when choosing sauna wood. A durable wood can withstand frequent temperature changes and humidity levels inside a sauna, ensuring longevity.

Some woods are more resistant to heat than others. Woods that resist warping or cracking under high heat are ideal for maintaining the sauna's structural integrity.

Here are some key qualities to consider when choosing sauna wood:

When choosing a wood for your sauna, durability and performance are top priorities. Hard woods like oak or teak can overheat quickly, making them a poor choice.

Softwoods, such as eucalyptus, cedar, and basswood, are great options because they don't conduct heat as much, keeping you comfortable even in scorching temperatures. They're perfect for sauna use.

Woods with excess sap, like some types of pine, should be avoided as they can create dangerous fumes and liquids that can ignite in a hot sauna. This is a major safety concern.

Eucalyptus, basswood, cedar, and thermo-spruce are some of the best types of soft wood for long-lasting saunas, as they can absorb heat without overheating. They're also affordable options, making saunas more accessible to everyone.

A sturdy soft wood is essential for a sauna that can withstand daily use without warping or rotting. Look for a well-built frame to ensure your sauna remains safe and functional.

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Choosing the right wood for your sauna can be a daunting task, especially with so many options available. Consider the style you want to achieve: a rustic, authentic look or a more modern, contemporary feel.

The type of wood used can greatly impact the aesthetic of your sauna. Light-colored woods like Basswood, Pine, or Hemlock can create a bright and airy atmosphere, while darker woods like Cedar, Thermowood, or Eucalyptus can add a cozy and intimate feel.

If you're looking for a traditional Nordic look, Spruce is a great option. It's a classic choice for sauna building and provides a natural Scandinavian feel.

However, if you want to add some warmth and elegance to your sauna, Alder is a great choice. Its warm reddish hue and small clusters of knots create a natural charm that's hard to resist.

Here are some popular wood options for saunas, grouped by their color and style:

Ultimately, the right wood for your sauna is one that matches your personal style and complements your home decor.