Best Wood for a Sauna: Cedar vs Hemlock vs Basswood

The wood your sauna is built from shapes how it feels, how long it lasts, and what it costs. Cedar, hemlock, and basswood are the three you will compare most often. This guide breaks down how each performs on heat and moisture, aroma, allergies, durability, and price, so you can match the wood to your space and budget.

The short answer

Cedar is the most popular sauna wood because it resists moisture and warping, stays comfortable to the touch, and carries natural oils that fight mold and odor, which makes it the top pick for outdoor and high-humidity cabins. It costs about 15 to 30 percent more than a comparable hemlock model. Hemlock is the value choice with similar structural strength and almost no scent, ideal if you find cedar too strong or want to save money, though it does best with good ventilation and a little upkeep. Basswood is nearly odorless and very low in resins, so it is the usual recommendation for people with allergies or chemical sensitivities, but it is soft and best kept indoors. Match the wood to where the sauna lives and how sensitive you are to scent.

Cedar: the premium standard

Western red cedar is the benchmark sauna wood. It is light and full of tiny air cells, so benches and walls stay cool to sit on even in a hot room. It barely absorbs water, so it resists swelling, warping, and cracking, and its natural phenolic oils resist mold, mildew, and bacteria while keeping the wood smelling fresh for years. That durability makes cedar the first choice for an outdoor cabin or a humid traditional room. The trade-offs are price and scent: cedar costs more, and a small share of people are sensitive to its oils. Browse our cedar saunas to see the range.

Hemlock: the value pick

Hemlock offers structural performance close to cedar at a lower price, which makes it popular for cost-conscious indoor builds. It has little aroma, a plus if cedar's scent is too strong for you. Its main limit is long-term moisture resistance, since it lacks cedar's natural oils, so it benefits from good ventilation and the occasional wipe-down. Heat-treated, or thermally modified, hemlock resists moisture and decay far better than raw hemlock, which is why many quality outdoor cabins use it for the exterior. Hemlock appears across our infrared saunas and traditional saunas.

Basswood: best for sensitive users

Basswood has virtually no tannins or resins, so it is the top recommendation for people with allergies or chemical sensitivities and anyone who wants a scent-free room. It is the lowest density of the three, so it absorbs less heat and stays gentle to the touch. The downside is softness: basswood dents more easily, stains from water contact, and has poor natural rot resistance, so it is best kept to indoor saunas rather than exposed outdoor builds.

Cedar vs hemlock vs basswood at a glance

Factor	Cedar	Hemlock	Basswood
Moisture resistance	Excellent	Good (better heat-treated)	Fair, indoor only
Aroma	Strong, pleasant	Very low	None
Allergy friendly	Can affect sensitive users	Low scent, usually fine	Best for sensitivities
Best use	Outdoor and humid rooms	Indoor value builds	Indoor, scent-free
Relative cost	Highest	Lower	Mid

How to choose your sauna wood

Start with location. For an outdoor or barrel sauna, cedar or heat-treated hemlock handle weather best; see our outdoor saunas and barrel saunas. For an indoor room on a budget, hemlock is hard to beat. If anyone in the home reacts to wood scents or has chemical sensitivities, basswood or low-aroma hemlock is the safer call. Then weigh how much you value the cedar aroma against its premium. When you have a wood in mind, our sauna wood quiz and sauna buying guide help you finish the decision.

Frequently asked questions

What is the best wood for a sauna? Cedar is the most popular for its moisture resistance, durability, and aroma, especially outdoors. Hemlock is the best value for indoor builds, and basswood is best for people with allergies or scent sensitivities.

Is cedar or hemlock better for an outdoor sauna? Cedar handles weather and humidity best thanks to its natural oils. Heat-treated hemlock is a strong, lower-cost alternative for exteriors, while raw hemlock is better suited to indoor rooms.

Which sauna wood is best for allergies? Basswood, because it has almost no tannins or resins and no scent. Low-aroma hemlock is a reasonable second choice if you also need outdoor durability.

Ready to choose? Compare models by wood in our cedar saunas and broader traditional sauna lineup, or contact our team for help. Restore Suite is an authorized retailer with free US shipping, financing, a best price guarantee, and HSA and FSA eligibility on many models.