Traditional step flashing should overlap ___ inches in every direction.

Traditional step flashing is a critical component in roofing systems, especially where the roof meets vertical surfaces such as walls or chimneys. The proper installation of step flashing ensures that water is effectively diverted away, preventing leaks and water damage.

The overlap required for traditional step flashing is 3 inches in every direction. This overlap is essential because it provides a sufficient barrier against the incursion of water. A 3-inch overlap ensures that there is enough material to shed water effectively while also accommodating potential thermal expansion and contraction of the flashing materials. Proper overlap reduces the risk of water infiltrating beneath the roofing materials, thereby enhancing the longevity and durability of the roofing system.

This dimension is based on industry standards and best practices, reflecting the need for both adequate protection against the elements and compliance with building codes that specify minimum overlap requirements for flashing materials.