Wind protection slab PAROC Cortex is non-combustible stone wool insulation with an integrated non-combustible wind tight facing for existing and new well-ventilated external walls in high-rise buildings. The wind protection insulation slab can be used as an external layer in a two layer-system in combination with another thermal insulation layer. With a two-layer system you can create a continuous thermal insulation layer with staggered joints to improve the thermal performance of the wall. The wind protection slab is faced with a vapour permeable, windproof membrane which creates an excellent barrier against the weather. Good vapour permeability allows possible moisture to dry safely without causing condensation problems inside the construction. The joints should be sealed with a special tape in order to minimise air leakage.