The mineral calcium-silicate panel of high hygroscopicity is outstandingly suitable to store any accumulating condensate and in addition, due to its good insulation qualities (dry gross density: 220-240 kg/m³; thermal conductivity <0,0060W/mK), it prevents heat losses in winter and heat gains in summer. Moreover, calcium-silicate is extremely heat-resisting and non-inflammable. As a further advantage, due to its high ph-factor it prevents mold fungus.