Which type of roof is commonly found on older strip malls?

Older strip malls primarily feature flat roofs due to several design and economic factors prevalent during their construction periods. Flat roofs provide a simple, economically efficient way to maximize interior space and are easier to construct and maintain when dealing with multiple adjacent retail spaces.

Additionally, flat roofs offer advantages such as ease of access for HVAC units and other mechanical systems, which are often positioned on the roof of commercial buildings. This design also facilitates the easy installation of signage and can allow for the collection of water, given the right construction specifications.

In contrast, other roof types like inverted or bowstring roofs typically involve more complex structural designs or specific aesthetic choices that are less common in the straightforward architecture of older strip malls. Metal on bar joists often appears in more industrial or modern buildings rather than in older retail environments. Overall, the characteristics of flat roofs make them a logical choice for the architecture of older strip malls.