Angie’s List has awarded CMG Sprinklers and Drains  their top rating for customer service and lists CMG with an “A” rating.  CMG  Installs Drainage Systems, Lawn Sprinkler Systems and provides Expert Sprinkler System Repair.   Our Drainage Systems utilize French Drains, Surface Drains, Channel Drains, and Sump PumpsSprinkler Systems installed by CMG use Rain Bird or Hunter Sprinkler Parts.  With over 20 years of experience we provide top quality Sprinkler Systems, French Drains, Drainage Systems, and Sprinkler Repair.

 

 


 

CMG Services all of Central Oklahoma including: Norman, Moore, Edmond, Yukon, Mustang, Oklahoma City, Midwest City, Del City, Blanchard, Newcastle, Purcell and Chickasha.

 

Drainage System Installation in Norman
Drainage System Installation in Norman

 

The title of this blog is,”What is a French Drain?”

CMG Sprinkler and Drain — Servicing all of Central Oklahoma

Many people confuse a Surface Drain with a French Drain.

The picture above is a Surface Drain.

French Drain is completely different from a Surface Drain.  A basic French Drain consists of a Perforated Drain Pipe in the bottom of a trench.  The Drain Pipe should have a neoprene sock around the Perforated Drain Pipe.   This is to ensure that the Drain Pipe does not become clogged.

The dirt that was taken out to make the trench is hauled away.  It is replaced by some type of small stone or gravel depending on what is desired or available.  I prefer crushed 1 inch lime stone.  It is the most economical option in my area.  Pea Gravel or some other type of small stone can work just as well.    The lime-stone or gravel is placed in the trench on top of the perforated Drain Pipe and filled all the way to the surface (ground level).   In some cases where the French Drain needs to be deep or is being placed in sandy soil, a special trench liner must be placed in the trench before the perforated Drain Pipe or the Gravel are installed.  This helps maintain the integrity of the trench over time.  It also increases the cost of the French Drain and the amount of time to install it.  I install a trench liner in a French Drain about 20% of the time.  Most of the time a liner in not needed.

French Drain March 2011
French Drain is designed to handle a large volume of water and cover a large area. The Drain is anyplace the trench goes. It has many applications and can be used in many situations.  It can be installed by itself or incorporated into a Drainage System with Surface Drains or Gutter Down-Spouts connected to it.
The main downfall of a French Drain is that they, for the most part aren’t very pretty.  They don’t look very nice in a yard once they are completed.
Depending on the area the French Drain is installed and the type of grass around the French Drain, will dictate whether grass grows over the lime stone.  Grass can grow up and through the gravel in the French Drain over time eventually covering the gravel.  This is Ok.  It won’t have a measurable effect on the performance of the drain.
DONT COVER THE GRAVEL IN THE FRENCH DRAIN WITH DIRT.  THE FRENCH DRAIN WON’T WORK IF THE TRENCH IS CLOGGED WITH DIRT.  DON’T EVEN INSTALL IT IF YOU ARE GOING TO COVER IT UP WITH DIRT.
DECORATIVE STONE CAN BE USED TO COVER A FRENCH DRAIN AND THEY LOOK GREAT AND LAST A LIFETIME.

French Drains Can Look Great!  
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Blane Callen

This concludes,”What is a French Drain.”
Comments
  1. […] to connect too many drains or gutters into a Drainage System.  A hard rain can overwhelm the Drainage Systems Water Flow Capacity.  When that happens, water backs up and the problem area […]

  2. […] Surface Drains on the side of the house,  6 inch French Drain along the garage foundation with 2 Pop – Up Emitters in the back yard and 3 Curb Fittings in the front.    First we installed 4 inch French Drain in […]

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