Make sure the trench is at least 18 inches deep and nine to 12 inches wide. French drains also need a slope of at least one inch for every 10 inches of pipe, or it won’t work.

For most of us, your trench will be 18-24 inches deep, and at least twelve inches wide. Since digging trenches sucks, you should consider renting a trencher from a local hardware store.

Unlike trench drains, French drains are hidden under gravel, and usually under turf, too. This means they're a much better-looking option than trench drains, because they're completely hidden.

French drains are popular solutions to deal with excess water in your yard. However, there is much to know before you install one. Consider these pros and cons.