ท่อน้ำฝน THINGS TO KNOW BEFORE YOU BUY

8. Right ventilation must also be taken into consideration when developing a concrete drain over a flat roof. Suitable airflow is necessary to forestall moisture buildup, which can result in hurt and deterioration of the roof.This tends to avoid h2o from pooling in other parts of the roof. If your roof by now includes a drain, you can use it for a