French Drain Installation

french drain installation in st louis
If you are looking for a solution to drain water appropriately, a professionally installed French Drain by Disaster Restoration Pros may be the right choice for you. It is a simple but elegant way to keep your home dry.

What Is A French Drain?

The French drain is a trench dug with gravel or small stones to drain water from the area through a perforated pipe. French drainage can help homeowners prevent water from accumulating in their garden.

Benefits of a French Drain

The French drain is an excellent addition to the house and garden. It has many advantages.

French drainage will protect your home from flooding because the water flows from all sides to the bottom point, and your home and garden are always clean.

Installing a French drain is a simple task. You don’t have to destroy your garden for a difficult job. All you have to do is work where you want to install it, and from there it’s easy.

French drains are not only efficient; they are also good for the environment. All you have to do is use environmentally friendly materials in your construction and save some money.

How French Drain Installation Works

  • Plan and mark the Trench
    Use the spray to mark a line or a taut wire between two small strips in the ground to mark the path you have chosen for the trench.
  • Decide where to Place the Waste Soil
    Do not lay it against the wall as this will allow moisture to penetrate. You can integrate it into your landscaping project or, if you want to get rid of it, you have to rent a skip.
  • Check the Depth of the Building Foundations
    The French drain should not be more profound than the foundations of nearby buildings, and if the foundations are shallow, the trench should be dug 1m from the wall.
  • Plan your French Drain Size
    Normally, a 200-300 mm wide trench is sufficient in most cases, but if you need to drain a lot of water, you may need a ditch up to 450 mm wide. The trench depth should be around 300-500 mm, and it should be dug so that it is inclined at a ratio of 1:50, which means that the trench should be lowered by 40 mm to a length of 2 meters.
  • Digging The Trench
    it can be dug manually, or a mini excavator can be hired to facilitate it. The channel sides should be inclined at an angle of at least 45 degrees to the building to ensure the stability of the surrounding ground.
  • Laying A Solid Rock Base
    Before putting in the drainage pipes, it’s necessary to first lay down the proper size gravel or rock. This rock helps prevent dirt settling and keeps your french drain working properly for many years.
  • Lay The Drainage Pipes
    Laying the drainage pipes is one of the most important steps of this project. The pipes must be laid with the proper grade to ensure water runs smoothing and quickly in the direction we want it to flow – away from your house and foundation. Pipes are laid with holes in them to help absorb rain or runoff water.
  • Cover The Drain
    Next the rocks and drainage pipes should be re-covered with dirt. Because of the proliferic clay material in the St. Louis soil, many times we bring in top soil to help new landscaping grow in and around the french drain.
  • Landscaping
    The last and final piece to installing a french drain is to replant and replace any grass or landscaping 

Negative Side Effects of Prolonging a French Drain Installation

Here are signs to check for when you want to check for problems with your leaking trench. These are symptoms that you should pay attention to:

  • Cracks in the walls
  • Significant increase in basement humidity
  • Mold on the floor or walls
  • The appearance of whitish crystals


Now that you know all about the French drain and the benefits of a French drain, you should have information to determine whether this approach is appropriate for your drainage problem.

If you need help with any part of the process, contact your team at Disaster Restoration Pros, a professional French drain installation company serving the greater St. Louis area in both Missouri and Illinois.

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