Painting is a crucial step, as it significantly contributes to the aesthetics and durability of the product. FAS uses water-based coatings that containing 10% max. chemical solvents, minimize emissions of harmful substances. In addition, the water paint perfectly adheres to the surface creating an elastic film following the micro movements of the wood. FAS Serramenti provides its windows with a coating system consisting of three coats: one of impregnating, one of a primer and one of finishing.