What materials should be avoided for roofs in areas with snow loads?

In areas with significant snow loads, lightweight panels without reinforcement should be avoided as roofing materials because they are less capable of supporting the additional weight imposed by accumulated snow and ice. Such roofs can lead to structural failure or collapse when subjected to heavy snowfall if they lack the necessary strength and stability. These lightweight options may not provide adequate support and could deform or break under stress, compromising the safety of the building.

Other materials, such as composite shingles, metal sheets, and clay tiles, can often be designed or installed to withstand the challenges posed by snow loads depending on their specific construction and application. In contrast, lightweight panels typically lack the necessary durability and structural integrity required in snowy environments, making them a poor choice for roofing under those conditions. Thus, when designing roofs for snowy areas, it is crucial to select materials that can handle the potential weight and stress rather than relying on materials that are too light or flimsy.