What is French drainage system?

A French drain or weeping tile (also trench drain, filter drain, blind drain, rubble drain, rock drain, drain tile, perimeter drain, land drain, French ditch, sub-surface drain, sub-soil drain or agricultural drain) is a trench filled with gravel or rock or containing a perforated pipe that redirects surface water and

Consequently, how does the French drain work?

A French drain is a gravel-filled trench that includes a perforated or slotted pipe. French drains direct surface level water toward the lowest point and allow it to seep through the surface level gravel into the drain. This gravel also blocks the passage of excess debris.

Subsequently, question is, what is the difference between a French drain and a trench drain? The main difference between the two is that French drains capture and remove ground water while trench drains quickly remove surface water before it can saturate the ground. Here's a closer look at each type of drain.

Keeping this in view, why is it called a French drain?

It's from Henry French, a judge and farmer in Concord, Massachusetts, who promoted the idea in an 1859 book about farm drainage. French drains provide an easy channel for water to flow through. Water runs into a gravel-filled trench, then into perforated pipe at the bottom of the trench.

Is a French drain necessary?

If your problem is surface water, choose a shallow french drain or curtain drain that is located uphill of the area you want to stay dry. If you are trying to prevent water from entering your basement, install a deep french drain or footlong drain that runs along your house and stops water from getting below ground.

How long do French drains last?

approximately 30 to 40 years

How do you install a French drain in your yard?

Installing French Drains 01:50

Dig a trench along the outside of your footing.
Lay the pipe on the virgin soil.
Cover the pipe with at least 12 inches of washed gravel.
Lay filter fabric over the gravel to prevent any soil from clogging the pipe.
Back-fill the foundation with top soil back to its original grade height.

Are French drains effective?

French drain systems are incredibly effective because, unlike typical surface drains, they collect water over the entire length of the drain as opposed to one dedicated area. The force of gravity helps to guide water along a reliably smooth path to a desired discharge point.

What is the purpose of French drains?

A French drain is a pipe placed in the ground to collect rain water. French drains are often used in yards and in basements that have drainage problems. French drains are used to transport excess water to low lying areas where the water will do no damage.

Do French drains really work?

Most descriptions of a french drain involve a slotted or perforated pipe, a trench, geotextile fabric and gravel backfill. Properly constructed, french drains will work well to transmit water from the pipe to the exit of the pipe; however, they are not very efficient in dewatering poorly drained soils.

How far should a French drain be from the foundation?

A French drain consists of buried perforated pipes slightly sloped to easily channel water flow, in this case, away from the house foundation. Start by digging a 2-foot-deep-by-18-inch-wide trench 2 feet or so away from the foundation at the highest point where the rear yard meets the foundation.

How do I know if my French drain is working?

How to Tell If the French Drain Is Working. The easiest way to tell if your French drain is operating properly is to look at your lawn or basement. If there's water, chances are there could be a problem and your drain isn't working correctly. This issue could be due to clogging.

How deep do French drains need to be?

A French drain starts with digging a trench. The depth and width of the trench can vary, but 5 to 6 inches wide and 8 to 12 inches deep are common sizes and usually satisfy most needs.

Do French drains clog?

French drains generally require very little maintenance, but they can occasionally become clogged or damaged. Rent an electric sewer snake to feed into your drain to clear it out.

What is a French gutter?

WHAT IS A FRENCH DRAIN? It sounds elegant but in reality, it's nothing more sophisticated than a gravel-lined ditch with an embedded pipe that carries water away from the home. Whereas gutters collect precipitation as it runs off the roof, French drains manage water at ground level.

How do you end a French drain?

How to End a French Drain

End the French drain at a low-lying water source, such as a pond or lake, if you have one on your property.
Aim the French drain toward a low-lying spot on your property where standing water will not do any damage.
Install a T-shaped pipe at the end of the French drain.

How do you clean French drains?

When the drain becomes clogged, water will back up and not drain out of your yard.

Find one end of the French drain.
Run water down the drain.
Try unclogging the drain with a pressure washer.
Use a sewer snake to clean out stubborn clogs.

What does a French drain cost?

French drains, for example, average $20 to $30 per linear foot or between $1,000 and $1,500 in exterior applications and $45 to $60 per linear foot or $5,000 to $6,000 for internal ones. These systems can benefit your home in a variety of ways.

Do you need pipe in a French drain?

Officially a French drain is a gravel drain with no pipe. The water just collects in and travels through in a gravel or stone filled channel that starts from the surface or just below it. But in modern times, and for practical purposes, we will consider a French drain to include a drainage pipe in the gravel.

Can a French drain be covered with grass?

The simplest drain is a classic French drain, which is nothing more than a trench filled with coarse stone or gravel. The drain can be left open or, if aesthetics are a concern, can be covered with a couple of inches of topsoil and sod.

What is a Dutch drain?

Dutch drain. Open drain that carries stormwater runoff from the bottom of a house wall away from the house.

What is the best pipe to use for a French drain?

French Drain Pipe Characteristics One of the most common pipe materials used to create a French drain is plastic because of its durability. There are two frequently chosen pipe variations: corrugated and PVC. Both are lightweight, but corrugated pipe can be flexible, while PVC is stronger and more rigid.