Mold growth on coastal walls is a big concern due to the high humidity and moisture levels that exist in these areas. Geo-membrane mix walls can be an efficient solution for controlling capillary rise damage in coastal structures while also providing a long-lasting, cost-effective, and environmentally friendly alternative to standard wall systems. Mold development caused by capillary rise is a common problem in buildings, particularly in coastal areas with inadequate moisture management. Capillary rise refers to the movement of water through porous materials produced by capillary action due to the adhesion forces between the water and the medium surpass. Here, the uses High-density Polyethylene geomembranes to successfully reduce mold growth on coastal walls. The effectiveness of HDPE geomembranes in forming a barrier against moisture infiltration is high. Investigating the features of HDPE geomembranes such as water impermeability and resistance to environmental degradation is important. Furthermore, it explores analytical ways for incorporating HDPE geomembranes into coastal wall construction and maintenance operations. A combination of theoretical research and analytical research illustrates the usefulness of this new method. The present research includes study on material composition, wall thickness and application processes to improve the performance of coastal walls in reducing capillary rise damming. Furthermore, a comparison of the environmental and economic benefits of geomembranes wrapped walls in coastal settings is shown, along with a pressure analysis of standard and geomembranes wrapped walls. The findings show considerable reductions in capillary rise-induced damage, demonstrating the promise of this novel method for coastal preservation and sustainable development. This analysis-based research seeks to contribute to the development of sustainable and resilient coastal infrastructure solutions from mold growth.