While polycarbonate sheets offer exceptional impact resistance and lightweight properties, they possess certain inherent drawbacks. They scratch significantly easier than glass or treated acrylic surfaces, which can dull their optical clarity over time if abrasive cleaning methods are used. Additionally, unprotected or lower-quality panels are susceptible to UV degradation, yellowing, and gradual embrittlement when exposed to prolonged sunlight. They also exhibit a high rate of thermal expansion and contraction, meaning they expand significantly when heated and contract when cooled, requiring careful installation clearances to prevent buckling or warping.