We performed the indoor inspection of a complex roof of a big store with the Elios 2 caged drone (www.flyability.com). The objective was to determine the overall state of the construction for future repair purposes. The roof measures 90m x 38m and has a height of 15m. With a conservative inspection they should have closed the store for 4 days. With our Elios 2 we inspected the roof in 5 hours and the store stayed open for the customers. The traditional inspection was quoted on a price 8 times higher than the price of the innovative inspection with the Elios 2.