The answer to 'how long does flat roof last' is that a well-maintained flat roof can typically last 10-20 years, or even longer with proper care. Flat roofs are popular for commercial and some residential buildings due to their simple design and ease of installation. However, they do require more regular maintenance and inspections compared to sloped roofs to ensure they remain watertight and durable.
The lifespan of a flat roof can vary depending on the materials used, the quality of installation, and the climate and environmental conditions the roof is exposed to. Factors like heavy snow loads, extreme temperatures, and UV exposure can all impact a flat roof's longevity. Regular inspections, prompt repairs, and proper maintenance are essential to maximizing the life of a flat roof.