Cedar Wood for Saunas: What You Need to Know
Western red cedar (Thuja plicata) has been a go-to sauna wood for decades, especially in North America. It's naturally rot-resistant, lightweight, and has that distinctive warm, aromatic scent that many people associate with saunas and spas. But cedar isn't automatically the best choice for every sauna application, and it's worth understanding both its strengths and limitations.
Cedar's Strengths
Natural decay resistance. Cedar contains natural oils (thujaplicins) that resist rot, fungal growth, and insect damage. For outdoor applications where the wood is exposed to rain and ground moisture, this is a genuine advantage.
Aromatic character. That cedar smell is iconic. Some people love it and consider it part of the sauna experience. The aromatic oils create a pleasant forest-like atmosphere, especially in the first few years.
Low density and thermal conductivity. Like hemlock, cedar is a softwood that doesn't get uncomfortably hot to the touch at sauna temperatures. It's also lightweight, making construction easier.
Beautiful appearance. Cedar has rich color variation - from pale yellow to deep reddish-brown - and distinctive grain patterns that look great in a sauna setting.
Cedar's Limitations in Saunas
Aromatic off-gassing. The same oils that give cedar its scent can be irritating to people with respiratory sensitivities, allergies, or asthma. In a small, hot, enclosed space, aromatic compounds concentrate in the air. Some users find the scent overwhelming, and it can trigger headaches or breathing discomfort in sensitive individuals.
Scent degradation. Cedar's aroma fades over time as the surface oils evaporate. After a year or two of regular use, the smell that attracted you to cedar in the first place may be largely gone - but the wood's appearance may have changed unevenly in the process.
Dimensional stability. Untreated cedar can still warp and move with moisture changes in a sauna environment. It's more stable than pine or spruce, but less stable than heat-treated (thermowood) alternatives.
Cost. Quality western red cedar is increasingly expensive due to supply constraints and logging regulations. Prices have climbed significantly in recent years.
Cedar vs Heat-Treated Hemlock
At SweatDecks, we build our saunas with FSC-certified heat-treated Canadian hemlock rather than cedar. The hemlock offers better dimensional stability, no aromatic off-gassing (hypoallergenic), comparable or better rot resistance through the thermal modification process, and a cleaner, more modern appearance. For most people, it's the better all-around sauna wood.
That said, if you love cedar's look and scent and don't have sensitivity issues, it remains a viable option. We carry some cedar sauna models for those who prefer it.
Related Terms
- Hemlock Wood for saunas
- Thermowood
- FSC Certified
- Sauna Benches
- Barrel Sauna
Compare Your Options
See the difference yourself. Browse our cedar saunas alongside our hemlock-built outdoor saunas and barrel saunas.
How to Use This Guide
Use this guide as a practical starting point, then confirm product specifications, installation requirements, electrical needs, water care steps, and medical considerations with the appropriate professional before making a final decision.
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SweatDecks helps shoppers compare saunas, cold plunges, heaters, accessories, delivery requirements, and setup considerations so the finished wellness space is easier to buy, install, and maintain.
Practical Buying Context
When comparing sauna, cold plunge, heater, steam, or accessory options, review the product specifications, installation manual, warranty terms, delivery requirements, maintenance routine, and compatibility details before choosing a model. The right answer often depends on available space, power, plumbing, climate, budget, and who will use the setup.
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Use qualified professionals for electrical work, plumbing, structural support, ventilation, medical questions, and local code requirements. SweatDecks can help with product research and planning questions, but final installation and safety decisions should match the manufacturer instructions and applicable local requirements.
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Related SweatDecks Research Paths
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What to Verify Before You Decide
Use this article as a starting point, then check current product specifications, manufacturer instructions, delivery requirements, warranty terms, and maintenance expectations. Sauna and cold plunge projects can involve heat, water, electricity, ventilation, structural support, and personal health considerations, so the best next step is often to confirm details with the appropriate qualified professional before purchase or installation.
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