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Degree of impermeability

Indicator number of the resistance to the passage of water characteristic of a constructive solution defined in such a way that it grows when this resistance grows and, consequently, the greater the humidity request, the greater the degree of impermeability of said solution must be to reach the same result. The gradation is applied to the solutions of each constructive element independently of those of the other elements. Therefore, the gradations of the different elements are not necessarily equivalent: thus, the degree 3 of a wall does not have to be equivalent to the degree 3 of a facade.