If the upper floor does not have heating systems, for example, a summer veranda, then the inter-floor ceiling will act as the only protection against heat losses. To solve such problems, use the lightest plates that will not experience loads: HOTROCK LIGHT (HOTROCK LIGHT ECO), HOTROCK BLOCK. It is worth noting that the least effect will be in the case of the same microclimate indicators in two residential premises. Then basalt wool slabs will act as a sound-proofing material. They absorb noise between floors, which makes living more comfortable.