A thermal wall (insulated double wall) is the name given to the core-insulated variant of the element walls. This also consists of two reinforced concrete shells, which are connected to each other by lattice girders. However, these are made of stainless steel, so that they can also transmit the forces in the insulation area without the risk of corrosion. The insulation is already installed in the space between them at the factory. 6 to 14 cm thick hard foam insulation is common. The reinforcement is also installed in whole or in part in the factory. There is no need for formwork on the construction site, the remaining space is poured with in-situ concrete on the construction site. When used above ground, the thermal wall can be produced on both sides in fair-faced concrete quality. However, since the surfaces are generally very smooth, plastering can generally be omitted. In the case of non-exposed concrete walls, only the joints of the element joints and, if necessary, the pores of the air pockets are filled and the surfaces are painted, for example, or wallpapered.
Source: bauwion
