Examine This Report on roof drain
หัวระบายน้ำฝน ใช้ท่อขนาดเล็กเพราะระบายน้ำฝนแบบเต็มท่อone. The very first thing you must consider when creating a concrete drain with a flat roof would be the slope of your roof. A flat roof will not be completely flat, as it typically features a