The trench should gently slope toward ... Chapter 33 of the International Residential Code (IRC) covers storm drain systems. Plan your project carefully. Exterior systems often run into problems ...

Having spent 30+ years in residential construction ... Except for simple sloping drainage systems, a trench encircles the foundation and contains the perforated pipe and gravel.

Nevertheless, I’ve stopped water from entering many basements with a trench drain that’s just 2 feet deep in clay-rich soils. For the system to work, there must be a low spot on your land that ...