Material profile

Stone

Sauna heater stones
Photo: Pexels contributor · Pexels License · source
Typical useHeater stones, hearths, feature walls and floors
Visual appearanceNatural greys and earth tones with a heavy, grounded character
Thermal behaviourHigh thermal mass; heater stones store and release heat as steam
Resin levelN/A
Moisture resistanceVery High
MaintenanceLow; heater stones are inspected and replaced periodically
Exterior suitabilityGood
Interior suitabilityGood
Bench suitabilityN/A

Stone is essential inside every sauna as heater stones — storing heat and giving the steam — and appears as hearths, feature walls and floors. Its mass moderates temperature but adds weight to the foundation.