INSIDE INSULATION OF WALLS
In those cases where the external insulation of the facade wall is not possible (eg. existing buildings with protected facade view or walls with direct contact to ground, etc.), the RAVATHERM™ XPS 300 WB insulation can be applied onto the internal walls. As the insulation is applied on the warm, inner side, the wall structure will be exposed to more severe temperature changes. Increased attention should be paid also to thermal bridges at the adjoining structures (walls, floor slabs perpendicular to the facade walls). The condensation risk must be checked carefully, especially at rooms with high relative air humidity.
The internally insulated rooms require regular and efficient ventilation. The rough surface of the RAVATHERM XPS 300 WB boards create a suitable basis for plastered or adhered finishings (gypsum board, ceramic tiles).
Due to the relatively high vapour diffusion resistance of the RAVATHERM XPS 300 WB boards, generally there is no need for additional vapour barrier.