The answer to 'how long does skylight last' is that a well-installed and properly maintained skylight can last between 15-25 years on average. Skylights are exposed to the elements and can experience wear and tear over time, but with regular inspections and maintenance, they can provide natural lighting and ventilation for decades.
The lifespan of a skylight depends on several factors, including the quality of the materials used, the installation method, the amount of exposure to sunlight and weather, and the level of maintenance. High-quality skylights made with durable materials like tempered glass or polycarbonate can withstand the elements better and have a longer lifespan. Proper installation by a professional roofer is also crucial to ensure the skylight is sealed and integrated into the roof structure correctly.