What is the required minimum thickness of aluminum for valley lining material?

The required minimum thickness of aluminum for valley lining material is specified as .024 inches. This thickness is essential because valley linings must withstand various environmental stresses, including weight from snow or debris, exposure to moisture, and potential damage from thermal expansion and contraction. Using aluminum at this recommended thickness ensures durability and structural integrity, effectively preventing water infiltration and prolonging the lifespan of roofing systems.

This thickness standard is often informed by industry best practices and local building codes, which seek to ensure that roofing materials perform reliably under varying conditions. While other thicknesses may be encountered, they do not meet the established criteria for strength and performance in applications involving valley linings, thus reinforcing why .024 inches is the benchmark.