The weight depends on the wood type and length of the sauna. Thermo wood is the lightest, larch is the heaviest. To give a rough estimate, a 2-meter sauna will weigh under 1 tonne, a 3-meter sauna – about 1,5 tonnes, a 4-meter sauna – about 2 tonnes, a 5-meter sauna – about 2,5 tonnes.