Najran: The roofs and rainwater drainage systems of traditional mud-brick homes in Najran are key features of the region's architectural heritage, reflecting a rich cultural identity and generations of local building knowledge.

According to Saudi Press Agency, these homes are constructed using natural materials such as sidr wood, palm trunks, and tamarisk timber, designed to provide durability, natural insulation, ventilation, and protection from environmental conditions. A distinctive feature is the traditional rainwater drainage system, known as the mizrab, which channels water away from walls and foundations to protect the mud structures from erosion and moisture damage.

Beyond their practical function, these architectural elements carry aesthetic and social significance, with decorative details reflecting local identity and craftsmanship. Construction and maintenance were traditionally community activities that helped preserve skills and strengthen social bonds.

Local artisans played a vital role in selecting materials and applying traditional techniques, demonstrating how simple natural resources were transformed into sustainable and effective structures that continue to embody Najran's architectural and cultural legacy.