An Unbiased View of roof drain
8. Proper ventilation should also be taken into consideration when creating a concrete drain with a flat roof. Ample airflow is essential to stop moisture buildup, which may lead to damage and deterioration on the roof.เมื่อน้ำฝนหล่นกระทบกับหลังคา ก็อาจกระเด็นข้า�