What is the most common name given to low slope roofs?

Low slope roofs are most commonly referred to as flat roofs due to their minimal slope, typically designed to have a pitch of less than 3:12. This specific construction is often used for various types of buildings, especially commercial and industrial structures, where water drainage can be managed effectively despite the low incline. Flat roofs are often covered with materials that can withstand standing water, like modified bitumen or single-ply membranes, which are optimized for waterproofing.

This terminology is widely accepted in the roofing industry, making it essential for professionals to recognize and understand the characteristics unique to flat roofs compared to other types like pitched roofs, which have a significant slope, or curved roofs, which incorporate arcs into their design to achieve aesthetic or functional goals. The awareness of these distinctions is crucial for anyone involved in roofing practices and design.