Part 1: Architect’s Guide 1 - 34 Example of Vertical cladding Pre-fabricated large wall panel with integral SHS sections (Finland) 1 Internal cladding – support for the façade 2 Thermal or acoustic insulation (1st layer) 3 Thermal insulation – 2nd layer behind steel trays 4 External cladding Figure 5.4 Cladding Figure 5.5 Thermal insulation These lightweight façade systems often contain an air space for ventilation between the continuous insulation layer applied in front of the floor edge and the internal side of the outer facing. This arrangement is conducive to good hygrothermal performance of the partition wall and facilitates installation of unjointed facing elements. However, installation of a rain screen to protect the external insulation layer is essential. If the external facing is watertight, the air space cannot be introduced and the façade will not be ventilated.
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