How to Make a Ba.t French Drain. A French drain removes water from a ba.t by collecting moisture in a shallow trench, pulling it into a perforated pipe, and .French Drain how it works. This post has already been read times! A French Drain is a perforated pipe surrounded by gravel. It is used to collect water from a .LIVE HELP! Consulting. We can answer any question and help save you time and money with your drainage project..Full service ba.t waterproofing company serving MD, DE, PA, and NJ..
To install an interior French drain, a waterproofing contractor cuts a channel into your ba.t slab around its perimeter. The contractor excavates the ground below the channel, installs perforated drain pipe and a sump pump well, and fills the trench with drainage gravel. The slab is patched with fresh concrete..