NF EN ISO 7783-2

Paints and varnishes. Coating materials and coating systems for exterior masonry and concrete. Part 2: determination and classification of water-vapour transmission rate (permeability).

Le présent document décrit la méthode de détermination de la perméabilité à la vapeur d'eau des systèmes de revêtement destinés à la maçonnerie et au béton extérieur, y compris aux supports poreux ; celle-ci est basée sur le principe de la méthode de la coupe pour film libre. Une classification en trois catégories est définie.

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