Scaffs India sidewall envelope.

The Wall-to-Roof Convergence: Step Flashing Geometry, Kick-Out Diverter Hydraulics, and Cladding Decoupling

• September 26, 2026
• admin

In complex multi-level residential architecture—such as split-level Kerala villas, colonial bungalows with protruding dormers, and multi-tiered estate homes—sloped roof planes frequently terminate against vertical walls. These intersections, known as sidewall and headwall abutments, represent one of the most critical transitions in building envelope science.   While field shingles shed water smoothly across an unobstructed slope, …