One effective way to prevent damp walls is by using waterproofing products like AquaFresh DampGarde. This fibre-reinforced waterproofing system is designed for terraces and exterior walls. It forms a stretchable, high-opacity film that bridges cracks up to 0.5 mm, preventing water seepage. For terraces, apply three coats, including a self-priming coat diluted with water, followed by two undiluted coats. For exterior walls, use a self-priming coat and one undiluted coat, followed by two topcoats for added protection.