The Use of 4″ x 4″ Step Flashing: Ensuring Proper Roof Installation
What Is the Concern? For asphalt shingle roofs, proper step flashing is crucial to prevent water infiltration and ensure the longevity of the roofing system. GAF’s standard step flashing instructions require step flashing to extend a minimum of 5 inches (127 mm) up the wall and a minimum of 5 inches (127 mm) out onto…