The answer to 'lifespan of skylight' is that the average lifespan of a skylight is 15-20 years, though this can vary depending on factors like the quality of the skylight, the climate, and proper installation and maintenance. Skylights are exposed to the elements and can deteriorate over time due to UV light, temperature changes, and weather conditions like rain, snow, and wind. With proper care and regular inspections, a well-made skylight can last up to 20 years or more. However, cheaper or poorly installed skylights may only last 10-15 years before needing replacement.
It's important to have your skylight inspected by a professional roofing contractor every few years to check for any leaks, cracks, or other damage. Replacing a skylight before it fails can help prevent water damage and other costly home repairs.