Layer by layer (LBL) coating deposition technique has seen an increasing interest in the last two decades due to the significant reduction of the substrate permeability to gases and the high achievable fillers loading. In this work we studied LBL coatings deposited by two method, dipping and Doctor Blade (DB) coating. Nanocomposite coating of polyvinyl alcohol (PVA) and Montmorillonite (MMT) were deposited by LBL method using DB and dip coating techniques. In an effort to compare the impact of these techniques and the crosslinking efficiency on the barrier to oxygen, the permeation properties at different relative humidities were tested and the extent of nanoclay intercalation as well as the films morphology were investigated. Barrier to oxygen was further improved by crosslinking with Glyoxal (Gly) and Glutaraldehyde (GA). The results showed also that the oxygen barrier of the deposited coatings with those techniques depends closely on the relative humidity.