What are the typical types of roof structures found in single-family dwellings?

The typical types of roof structures found in single-family dwellings primarily include flat and pitched roofs.

Flat roofs are characterized by their minimal slope, providing a flat surface that can be utilized for various purposes, such as rooftop gardens or installations of HVAC equipment. They are more common in certain architectural styles and climates.

Pitched roofs, on the other hand, are designed to shed water and snow, making them a practical choice in areas with precipitation. Pitched roofs can come in various designs, including gabled roofs, which are noted for their triangular shape at the peak, and hip roofs, which have slopes on all four sides, but the category of pitched roofs broadly encompasses all such structures.

While the other options mention valid roof types, they do not accurately reflect the common combination found in single-family residential construction. The inclusion of pitched roofs with the flat roofs offers a comprehensive view of the diversity found in residential roofing styles. Thus, flat and pitched roofs emerge as the right combination to represent the typical structures in single-family dwellings.