To install a French drain the first step is to dig a 6-inch-wide by 18- to 24-inch-deep trench around the perimeter of the slab. Line the trench with heavy plastic. Then, fill the bottom of the ...

From there, you'll dig a trench and prepare your wall's base. After, you'll lay out the paver blocks in courses. It's also recommended to install drain pipes every 25 to 50 feet to ensure your ...

Surround the drain with 4 inches of concrete to lock it into place. Make sure the drain is about 1 inch lower than the outer edges of the concrete so the water will flow down into the trench drain.

Installing a French drain costs less than building a retaining wall, with an average price tag of $5,000 or so. This type of ...

Must see: Building façade made of massive concrete drain pipes. By BD+C Editors. June 7, 2013. ... Sign up for Building Design+Construction Newsletters . SIGN UP. Trending. Designers. Placemaking: ...