The typical lifespan of interior glass products varies significantly by type, quality, and usage conditions. High-quality tempered glass tabletops and shelving properly installed typically last 15-20 years before showing noticeable wear. Standard mirrors maintain their reflective properties for 20+ years when protected from humidity and harsh cleaning chemicals, though silver-backed mirrors in bathrooms may show edge deterioration after 7-10 years without proper sealing. Shower enclosures generally last 20-30 years, with hardware components requiring replacement before the glass itself deteriorates. Glass balustrades and structural elements can last the lifetime of the building (50+ years) when properly specified and installed. Decorative glass elements like stained glass windows can exceed 100 years with proper maintenance. Factors affecting longevity include installation quality, environmental conditions, cleaning methods, and frequency of use—making professional installation and appropriate maintenance crucial for maximizing glass product lifespan.