The author explains how different types of snow barrier can prevent this winter hazard.
Most flat roofs have a parapet.
It is the low wall built along one side of, or, all around the perimeter of a flat roof, where it may modify the wind flow over the roof so that the pressure on it is more uniformly distributed. Roof Functions, Requirements and Components A roof assembly as a whole must perform a variety of functions. The materials and components in the assembly are selected based on the properties that make them suitable for these various tasks. A weather-tight roof is basic in the preservation of a structure, regardless of its age, size, or design. In the system that allows a building to work as a shelter, the roof sheds the rain, shades from the sun, and buffers the weather.