In order to put the current coatings object of this chapter into perspective, Table 3.1 presents the classification proposed by LNEC—Laborahmo Nacional de Engenharia Civil (National Laboratory for Civil Engineering) [9, 10]—for coatings for interior wall surfaces, where the ones dealt within this chapter are shaded.
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Table 3.1 Classification of the coatings for interior wall surfaces [9]
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Table 3.2 Types of current gypsum-based coatings (EN 13279-1: 2005)
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According to this classification, interior coatings fall within the following four categories:
• Smoothing coatings—to give the wall planeness, verticality and surface regularity
• Finishing coatings—to give the wall a smoothing complement, thus guaranteeing in most cases a pleasant visual look
• Water-resistant coatings—to provide the finishing coat in walls in locations where water is frequently present or cleaning is made by wet means
• Decorative coatings—to provide the aspect intended by the users in terms of visual comfort, when the underlying coats do not do it by themselves
In order to present a more specific classification of current gypsum-based coatings, Table 3.2 shows the classification proposed in standard EN 13279-1: 2005.
Similarly, for synthetic coatings, Table 3.3 presents the classification included in Veiga et al. [11] for walls and ceilings’ interior surfaces.
The historic introduction leads to the following global classification that will be used in the next sections:
(a) Traditional gypsum plasters made according to ancestral proceedings
(b) Premixed gypsum plasters, whose constituents are all preselected and mixed in the factory and are applied on-site by spraying
(c) Premixed synthetic plasters, whose composition includes synthetic resins
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Table 3.3 Classes of synthetic binder coatings for interior wall surfaces [11]
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