Hemlock vs Cedar Sauna: Which Wood Is Better?

Cedar and hemlock are the two woods you will see most often on home saunas, and the right pick comes down to where the sauna lives and what you want to spend. Cedar resists rot and moisture naturally and suits outdoor builds, while hemlock costs less and performs nearly as well indoors.

The short answer: hemlock vs cedar sauna

For an indoor, climate-controlled sauna, hemlock is the better value. It runs roughly 20 to 50 percent cheaper than western red cedar, stays dimensionally stable under repeated dry-heat cycles, and gives off little aroma, which matters if you are scent-sensitive. For an outdoor sauna, or any build exposed to weather and humidity swings, cedar earns its premium. Its natural oils resist rot, decay, and insects, so a cedar sauna commonly lasts 15 to 25 years versus roughly 10 to 15 for hemlock. Cedar also carries the warm, spa-like smell many buyers want. Neither wood is a wrong choice. You are trading upfront cost and aroma (cedar) against budget and a neutral, low-scent finish (hemlock). Match the wood to the location first, then to your budget.

Is hemlock or cedar better for a sauna?

Both are proven sauna woods with low thermal conductivity, so neither gets dangerously hot to the touch and both insulate well. The differences show up in three places: moisture resistance, cost, and scent.

Cedar's natural oils make it the more forgiving wood in damp or variable conditions, which is why nearly every quality outdoor and barrel sauna is built from western red cedar. Hemlock has moderate moisture resistance and does best indoors where temperature and humidity stay controlled and the room is properly ventilated. Hemlock is also prized for a clean, knot-light appearance and strong resistance to surface cracking under heat cycling.

If you want the classic sauna smell, cedar delivers it. If you or someone in your household finds cedar's aroma too strong, hemlock's near-neutral scent is a genuine advantage rather than a compromise.

Cedar vs hemlock: cost, durability, and use

Factor	Western red cedar	Hemlock
Relative cost	Premium (about 20 to 50 percent more)	Budget-friendly
Moisture and rot resistance	High (natural oils)	Moderate; keep it indoors
Typical lifespan	15 to 25 years with care	10 to 15 years indoors
Aroma	Warm, distinct cedar scent	Near-neutral, low scent
Best fit	Outdoor, barrel, humid or variable climates	Indoor, climate-controlled rooms

Cedar's decay resistance is well documented; the USDA Forest Products Laboratory classifies western red cedar heartwood among the naturally durable species, which is the reason it holds up outdoors without chemical treatment. Hemlock is not rated as decay-resistant, so its long life depends on staying dry and ventilated.

Which sauna wood should you buy?

Choose cedar if the sauna will sit outside, if you live somewhere humid or with wide seasonal swings, if you want the traditional sauna aroma, or if you plan to keep the unit for two decades or more. Choose hemlock if the sauna goes in a basement, spare room, or garage that stays climate-controlled, if you are watching the budget, or if you prefer little to no scent. Buyers furnishing a backyard build almost always land on cedar; buyers fitting out an indoor room split more evenly, and hemlock often wins on price without a real performance penalty. You can compare finished cabins in our traditional saunas collection, and if you are leaning toward an outdoor build, the same logic points you to a cedar model in our outdoor saunas lineup.

Frequently asked questions

Does hemlock smell like cedar in a sauna? No. Hemlock is close to scent-neutral, which many buyers prefer. Cedar has the strong, warm aroma associated with a classic sauna. If scent sensitivity is a concern, hemlock is the safer pick.

Can you use hemlock for an outdoor sauna? It is not ideal. Hemlock lacks cedar's natural rot resistance, so outdoors it needs excellent ventilation and protection from standing moisture and tends to have a shorter life. For weather exposure, cedar or another naturally durable wood is the safer choice.

Is cedar worth the extra cost? Outdoors, yes, because its rot resistance protects a big-ticket purchase for decades. Indoors in a controlled room, the value gap narrows and many buyers reasonably choose hemlock to save money.

Still deciding between wood types, sizes, and heater styles? Our sauna wood guide breaks down every common species, and the sauna buying guide walks through the full decision. When you are ready to compare real models, browse our traditional saunas for sale, all backed by free US shipping, financing, and authorized-retailer support. Have a specific room in mind? Reach out and we will help you match the wood and size to your space.