The smart Trick of ระบบระบายน้ำฝน That No One is Discussing
9. Correct insulation is essential for a flat roof with a concrete drain, mainly because it may also help reduce freezing and likely damage in the course of colder months. Satisfactory insulation may also aid in advertising right drainage by protecting against drinking water from freezing on the roof surface.หนาวแล้ว! กรมอ�