Commercial buildings are buildings that are used for commercial purposes, and include office buildings, warehouses, and retail buildings (e.g. convenience stores, 'big box' stores, and shopping malls). In urban locations, a commercial building may combine functions, such as offices on levels 2-10, with retail on floor 1. When space allocated to multiple functions is significant, these buildings can be called multi-use.
Local authorities commonly maintain strict regulations on commercial zoning, and have the authority to designate any zoned area as such; a business must be located in a commercial area or area zoned at least partially for commerce.
The Department of Energy tells us that, "A cool roof under the same conditions could stay more than 50°F cooler and save energy and money by using less air conditioning." 
- "Why Do You Need A Roofer | Home | Republic Roof Systems LLC | Houston, Texas Roofing". Republic Roofing. 2019-06-17. Retrieved 2019-06-19.
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