This project is intended to investigate the ability of a PVA-chitosan film to prevent moisture damage of a mycelial biocomposite packaging material. Critical parameters such as water vapor permeability and water contact angle were identified. The wide variety of potential materials obtained in the literature review was reduced in accordance with the critical parameters. Focus was adjusted from the initial chemical modification method to silica nanoparticle additives to meet supply constraints and generate novel data. The dissolution process of PVA was verified to require heat of at least 85 degrees Celsius. The polymer solution and silica additive were combined into films to test the film-making process and ensure miscibility of the additive. The chitosan-PVA ratio was varied in 25-75, 50-50, and 75-25 ratios. Silica was added at 0.5, 1.0, 1.5, and 2.0 wt. %. Water contact angle measurements were taken to inspect the control and all 12 additive-rich film permutations. Further testing will focus on water vapor permeability testing alongside tensile testing, FTIR and SEM analysis, and others as time and equipment allows.