Two Woods, Two Different Visual Impressions

Western red cedar

Western red cedar (Thuja plicata) is the most widely used premium sauna wood in North America. Its defining visual characteristics are a warm reddish-brown base color with natural variation — honey tones, amber streaks, and occasional darker grain lines that give each panel a distinct character. The color darkens slightly with heat exposure over time, developing a richer patina. Cedar has a distinctive natural scent — aromatic, warm, and immediately recognizable — that most people associate with luxury spas and high-end wellness environments. The scent intensifies when the sauna heats up.

Cedar's natural oils (thujaplicins) provide class-leading rot resistance among softwoods without chemical treatment. Janka hardness: 350 lbf — soft enough to stay cool to the touch at sauna temperatures, which matters for bench comfort. Cedar is used by Sun Home (Eclipse, Pod, Luminar interior), Almost Heaven, Clearlight, and most premium traditional sauna builders.

Hemlock

Hemlock (Tsuga) is the most widely used wood in budget and mid-range infrared saunas. Its defining visual characteristics are a pale tan to light yellow color with minimal grain variation — uniform, consistent, and visually quiet. Hemlock has virtually no natural scent. The wood is smooth and clean-looking but lacks the color depth, grain character, and aromatic presence of cedar. In a sauna context, hemlock reads as functional and neutral rather than warm and premium.

Hemlock has lower natural rot resistance than cedar — it lacks the thujaplicin oils that give cedar its durability advantage. This matters less for indoor saunas (no weather exposure) but significantly for outdoor applications. Janka hardness: 500–540 lbf — harder than cedar, which means it conducts slightly more heat to the touch but is more resistant to dents and scratches. Hemlock is used by Dynamic Saunas, JNH Lifestyles, SaunaBox, and most saunas under $5,000.

Cedar vs. Hemlock: Property-by-Property Comparison

The Visual Test: How Each Wood Looks in a Home

The cedar vs. hemlock question is ultimately a question about context. In a commercial gym, a medical office, or a garage, hemlock looks fine — it is clean, light-colored, and inoffensive. No one notices it or thinks about it. That is the point: hemlock is visually invisible.

In a home — a master suite, a bathroom, a home gym, a living room, or an outdoor patio — "visually invisible" is not what most buyers want. A sauna that costs $5,000–$13,000 and occupies 20–30 square feet of living space should look like it belongs there. It should coordinate with the room's material palette the way furniture and cabinetry do.

Cedar coordinates. Its warm reddish-brown tones work with wood floors, leather furniture, stone surfaces, warm-toned tile, and natural-fiber textiles. Cedar reads as a material that was chosen — like walnut, teak, or oak. It has enough color and grain to hold its own visually against other finished surfaces in a room. When the sauna heats up, the scent reinforces the spa atmosphere. Guests notice cedar. It registers as premium.

Hemlock blends into the background. Its pale, uniform color does not coordinate with or contrast against room materials — it simply exists next to them. In a designed space, hemlock reads like unfinished pine shelving or a utility closet. It does not offend, but it does not elevate. Guests do not notice hemlock. If anything, they notice the sauna looks like a piece of equipment rather than a piece of the room.

What About Eucalyptus?

Sun Home's Equinox and Solstice use kiln-dried eucalyptus at 7% moisture content — not cedar and not hemlock. Eucalyptus occupies a different position on the wood spectrum:

Color: Light to medium tan with a subtle golden undertone — warmer than hemlock, cooler than cedar. More modern and less rustic than cedar's reddish-brown.

Grain: Tighter and more uniform than cedar, but with more depth and texture than hemlock. Reads as clean and contemporary.

Hardness: Significantly harder than both cedar (350 lbf) and hemlock (500 lbf) — eucalyptus species range from 1,000–2,000+ lbf depending on variety. More dent-resistant and longer-wearing, but conducts slightly more heat to the touch.

Scent: Mild, clean — not as aromatic as cedar, not as scentless as hemlock. A subtle middle ground.

Design fit: Eucalyptus works particularly well in modern and contemporary interiors where cedar's warmth might feel too rustic and hemlock's paleness feels too utilitarian. The Equinox's eucalyptus interior paired with black-tinted glass and Magne-Seal™ concealed assembly produces a different aesthetic than a cedar cabin — more furniture, less traditional sauna.

Which Brands Use Which Wood — and What That Signals

Wood choice is one of the clearest signals of where a sauna brand positions itself. Cedar and eucalyptus cost more than hemlock — which is why budget brands default to hemlock and premium brands default to cedar or hardwoods. The wood is the single largest visual surface in any sauna. It is also the surface you touch, smell, and sit on during every session. There is no upgrade path — you cannot swap hemlock for cedar after purchase.

Does the Wood Actually Matter for Performance?

For heat performance — not significantly. Both cedar and hemlock are poor heat conductors (which is what you want in a sauna — the wood stays comfortable against skin at 150–170°F). Both can handle the temperature cycling of daily sauna use. Both are structurally adequate for sauna cabin construction.

Where the wood matters:

Durability. Cedar lasts longer than hemlock in humid environments (interior sauna conditions are humid). Cedar's natural oils resist mold and mildew. Hemlock is more susceptible — particularly under the bench, around the floor, and at joints where moisture collects. Over 5–10 years of daily use, the durability gap becomes visible.

Scent. Cedar's aroma is a meaningful part of the sauna experience for many users. It reinforces the wellness atmosphere. Hemlock provides no scent — the sauna smells like heated wood, but without the distinctive aromatic quality. This is a preference, not a performance metric, but it affects whether a session feels like a spa experience or a functional heat treatment.

Appearance over time. Cedar develops a richer patina with age — the color deepens, the grain becomes more pronounced. Well-maintained cedar looks better at year 5 than year 1. Hemlock tends to yellow slightly and can develop water stains or discoloration around areas of repeated moisture exposure. It does not age as gracefully.

Resale perception. If you ever sell the sauna or the home, cedar is universally recognized as a premium wood. Hemlock is not. A cedar sauna in good condition signals quality. A hemlock sauna signals budget — regardless of the other features it may have.

When Hemlock Is the Right Choice

Hemlock is not a bad wood. It is a cost-effective wood. And for certain buyers and certain contexts, cost-effectiveness is exactly the right priority:

Budget is the primary constraint. If your total sauna budget is $1,500–$3,000, hemlock-construction saunas from Dynamic (~$1,800), JNH, or SaunaBox are the only options. Cedar saunas at this price point do not exist with comparable heater specs. Hemlock gets you into the sauna category at a price where cedar is not available.

The sauna will live in a garage, basement, or utility room. If no guests will see it and visual design is irrelevant, hemlock performs the same thermal function as cedar at a lower cost. The aesthetics matter less when the context is purely functional.

You are scent-sensitive. Cedar's aromatic oils, while pleasant to most people, can bother some individuals with chemical sensitivities or respiratory conditions. Hemlock's lack of scent is an advantage for these buyers. Basswood is another hypoallergenic alternative.

You prefer the pale, minimal look. In very specific design contexts — white-walled Scandinavian-minimal interiors, Japanese-inspired rooms — hemlock's pale neutrality may be preferable to cedar's warmth. This is a genuine aesthetic choice for a small segment of buyers.

When Cedar Is Worth the Premium

The sauna is in a visible living space. Master suite, bathroom, home gym, living room, outdoor patio — any space where the sauna is seen by the owner daily and by guests occasionally. Cedar earns its premium when visual quality affects how the space feels.

You want the sauna to last 10+ years. Cedar's natural rot resistance and graceful aging make it the better long-term material. Hemlock can last 10+ years with careful maintenance, but cedar does it with less effort and better results.

The aromatic experience matters. If the scent of heated cedar is part of what makes a sauna session feel restorative, no other wood replicates it. Eucalyptus has a mild scent. Hemlock has none. Cedar is the aromatic standard.

You care about resale value. Cedar saunas hold perceived value better than hemlock saunas — both as standalone resale and as a home feature during a property sale.

How Sun Home Approaches Wood Selection

Sun Home uses two interior woods across its lineup, each chosen for a specific design and performance purpose:

Canadian western red cedar — Eclipse (2P, 4P), Pod, Luminar (interior). Selected for its warmth, aroma, natural rot resistance, and premium visual character. Cedar is used on Sun Home's highest-priced models where the interior aesthetic is a primary design element — the warm cedar glow through black-tinted glass is a defining visual signature of the Eclipse and Luminar.

Kiln-dried eucalyptus at 7% moisture — Equinox (2P, 3P), Solstice (1P–4P). Selected for its modern tone, superior hardness, and clean contemporary aesthetic. Eucalyptus gives the Equinox and Solstice a different visual identity than cedar — more furniture-like, less traditional sauna. The 7% moisture content is lower than industry standard, reducing the risk of warping and cracking over time.

Sun Home does not use hemlock on any model.

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