HELPING THE OTHERS REALIZE THE ADVANTAGES OF ROOF DRAIN

eight. Right air flow also needs to be taken into account when building a concrete drain on the flat roof. Adequate airflow is essential to prevent humidity buildup, which may lead to injury and deterioration of the roof.อ้างอิง-ภาพ : สำนักงานทรัพยากรน้ำแห่งชาติ ซื้�