What type of roof is commonly used for large commercial buildings such as supermarkets and warehouses?

The type of roof commonly used for large commercial buildings such as supermarkets and warehouses is flat roofs. Flat roofs are advantageous for these types of structures due to their ability to maximize interior space and facilitate the installation of rooftop equipment, such as HVAC systems. Additionally, flat roofs are often more cost-effective in terms of construction and maintenance in comparison to other roof types.

They also provide effective water drainage when designed properly, and the flat surface can be used as additional usable space, such as for storage or cooling units. The design also allows for easier access for maintenance and repairs, which is crucial for the operational efficiency of large commercial buildings. In contrast, pitched roofs, curved roofs, and hip roofs tend to be utilized more in residential or certain specialized commercial applications, where aesthetics or specific structural advantages are prioritized.