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A strong and straight frame is the basis of every sauna. On it rest the insulation, vapor barrier and finishing boards, therefore the quality of the frame determines whether the sauna walls, ceiling and benches will be level and neat. Read more
Why is straight, calibrated lumber important? All elements of calibrated lumber have the same cross-section, and straight lumber is not twisted or bent. Therefore, the frame is immediately even: the panels lie evenly, there are no gaps or bulges between them, and the benches are installed straight. A frame built from crooked or uneven-thickness lumber has to be leveled, and the unevenness later shows in the finish.
Thermowood for the frame in a thermowood sauna. If the sauna finish and benches will be made of thermowood, it is worth choosing thermowood for the frame. The supports are visible through the gaps in the bench boards, and the light color of ordinary lumber against the dark thermowood background stands out. A frame of one color allows the sauna to look unified and tidy.
Where is it used?
- Wall and ceiling frame: battens between which thermal insulation is laid.
- Furring strips: attached on top of the vapor barrier so that a ventilated gap remains between it and the panels.
- Bench supports: sturdy structures on which the bench boards are mounted.
How to calculate the quantity? The amount of lumber depends on the sauna dimensions, the area of the walls and ceiling, and the frame spacing. Send us the sauna plan or dimensions, and we will help calculate the required amount of lumber and select other materials: vapor barrier, insulation, and panels.
Information last checked 2026-11-10
