What is the patch procedure in built-up roof membranes?

The patch procedure in built-up roof membranes involves extending the patch 18 inches beyond the perimeter of the damage. This extent ensures that there is adequate coverage and adherence to both the damaged area and the surrounding membrane, facilitating a reliable seal that helps prevent water infiltration and extends the life of the roof. This guideline is important because it ensures that any potential weaknesses around the edges of the patch are addressed, thus minimizing the risk of future leaks. The choice of 18 inches is a standard practice that balances thoroughness with practicality, ensuring effective repairs without excessive material use. It's essential for roofing professionals to follow these specified sizes to maintain quality and safety standards in roofing repairs.