Material Selection

At Haus of Heat, every material is chosen with intention. We work with woods, stones, and metals that have been selected for how they age, how they perform under extremes, and how they deepen in character with use. Each element is shaped by the contrast our products are built around: heat and cold, weight and light, presence and quiet.

Exterior Treatment

North American Walnut

Valued for its dark chocolate hue and bold grain, the North American walnut brings a sense of warmth and quiet sophistication to our exterior builds. Long favored in fine architectural interiors and heritage cabinetry, it is dense, dimensionally stable, and naturally resistant to warping. Over time, walnut deepens in tone and develops a soft patina, a material that doesn't just endure, but improves with the years.
INTERIOR LINING

African Ayous

Light, smooth, and sustainably sourced, African ayous lines the interiors where the body meets the wood. Prized in Finnish sauna tradition for its low thermal conductivity, ayous remains comfortable to the touch even at full heat. Its creamy tone and fine, knot-free grain reflect ambient light beautifully bringing a quiet, minimal calm to every interior surface.
This premium exterior treatment weathers gracefully over time, developing a rich patina that enhances the organic beauty of the wood while maintaining structural integrity for years to come.
INTERIOR LINING

Red Cedar

Recognized for its rich color and distinct natural scent, red cedar offers superior insulation and natural antibacterial properties, qualities that have made it a staple in sauna construction for generations. Aromatic, durable, and visually warm, cedar is a material that performs as beautifully as it looks, aging into deeper, richer tones with each cycle of heat and time.
INTERIOR LINING

Canadian Hemlock

Subtle, smooth, and hypoallergenic, Canadian hemlock carries a pale, even grain that creates a calm, minimal aesthetic in any interior. Naturally resistant to warping under heat, it is particularly well-suited to infrared sauna environments where consistent, even heat retention defines the experience.
INTERIOR LINING

Siberian White Pine

Light, natural, and serene, Siberian white pine carries a soft tone and organic knots that bring a feeling of raw tranquility to a space. Excellent at diffusing heat evenly, it is a wood long associated with the Scandinavian sauna tradition, clean and unembellished. A foundational material for builds that lean toward minimalism.

Ultra-white Tempered Glass

Ultra-white tempered glass brings light and openness to our builds without the green tint of standard glass. Its iron-free clarity reveals wood and stone exactly as intended, while its tempered strength withstands the thermal stress of sauna and steam environments.

Soapstone

Used in sauna construction for centuries, soapstone absorbs, retains, and slowly releases heat. Dense and non-porous, it softens the warmth into a gentle, enveloping climate that lasts long after the heater cycles down.

Steel

Selected for its strength and proven performance under repeated thermal cycles, steel forms the structural foundation of our heating systems and select architectural details, built to last as long as the sauna itself.
Sustainability

Sourcing & Sustainability

Sustainability is a core principle throughout our production process. All woods used in our builds are responsibly sourced and FSC certified, ensuring environmentally conscious practices and the long-term protection of natural resources. We believe that designing for longevity begins long before the wood reaches our workshop, and we partner only with suppliers whose practices reflect the same standard of care found in our finished products.
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