In a coastal tropical residence, which passive design feature helps shading and ventilation?

• A. Flat Roof with No Overhangs
• B. Deep Verandas
• C. Small, High-Performance Windows Only
• D. All-Glass Curtain Wall Without Shading

Answer: (B)

Deep verandas provide a shaded buffer around the building, intercepting the high-angle tropical sun to keep walls and interior spaces cooler. They also create an open transition space where breezes can move along the façade, promoting natural cross-ventilation into the living areas behind them. In coastal tropical design, this combination of shade with a breeze pathway reduces heat gain and improves comfort without mechanical cooling. By comparison, a flat roof with no overhangs offers little shade, small high-performance windows alone limit ventilation, and an all-glass curtain wall without shading invites heat gain and restricts airflow.