1) In the front yard - first we will fix the foundation
ground slope problem. We will also try installing a
few independent drywells along the path of the
proposed French drain to see if they will handle the
Soggy Lawn Swamp problems. *
2) In the side yard - we will only install half of the
French drain system and a pair of small drywells to
see if it corrects the drainage problem.
Although it can't be seen in this picture, the drain
pipes servicing the area 1 locations in the side yard
include short vertical pipes that rise straight up from
underground piping to accept the downspout and
the surface drain for the area 1 next to the driveway.
* Some of the soil from digging the drywells and the
French drain in the side yard can be used for
correcting the foundation ground slope in the front
In Step 3 you will find information on:
• How to diagram and layout your drainage system
• Drywell and French drain installation
• Perforated plastic pipe and drainage tile
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|Lawn, Yard, and Garden Drainage Guide - STEP 3
|How To Diagram and Layout a Yard Drainage System – Step 3
It is time to combine all the pieces of drainage information you learned in Step One - How To Discover Your Water Drainage Problems, and Step 2 -
How To Design a Drainage System. The goal here is to solve your drainage problems with as little digging and as little cost as possible. To achieve
that goal you will design and diagram a COMPLETE drainage plan, BUT only install one or two parts at a time to see if your drainage problems can
be solved with a PARTIAL drainage system.
Get out your original rainy day sketch and re-draw it nicely on a clean paper. Also quickly refresh yourself on the information linked to in Step 2 -
How To Design a Drainage System. The links in the following text will take you to instructions on how to build or install the drainage features.
The examples to the right will help you see how
to produce a yard drainage diagram.
We will use this example of a house on a corner lot
that has one drainage problem in the side yard and a
separate drainage issue in the front yard by the
In our sketch of this house the Lake Downspout type
issues are labeled with a 1, the Soggy Lawn Swamp
areas are labeled with a 2, and the Rainy Rivers
created as the lawn swamps overflowed are labeled
with a 3 anywhere they gather, turn, or end. Note
that there was an area next to the driveway where
rain water flowing off the drive quickly builds up and
that is labeled as a 1 also.
In the example each 1 is connected by a line to any 2
that it feeds, and each 2 is connected by line to any
3 that it feeds – this diagram shows the flow of the
|Follow the steps linked below to correct most home and yard drainage problems...
|Detailed instructions on drainage system components at these links...
|In this next diagram we see what the drainage
pipe layout would be for a COMPLETE drain
Notice that the locations of the drain lines have been
shifted away from the trees to avoid the root areas.
Also notice how all the pipe runs are straight and how
connecting pipes intersect at either 90 or 45 degree
angles. There are only 90 and 45 degree connectors
available for rigid plastic drainage pipe.
Click the links to read why I do not recommend the
flexible corrugated perforated plastic drainage pipe
and also be sure to read why some T connections
use 45 degree connectors
|> Remember that although this shows a
complete drainage system diagram, the goal for
anyone using their own muscle, money, and
time is to install as little of the system as will
solve the drainage problem.
The next picture shows the first portion of the
drainage system we will install.
The most critical problem in the above drainage diagrams is the water that builds up right next to the foundation in the front yard. Upon checking the
slope of the ground in this area we find that it is too flat and therefore needs to be built up to get the water to drain away from the house. The
second noticeable item is the long length of drain needed to get from the single area 2 in the side yard clear out to the dry area.
To minimize our digging and material costs we want to first try two smaller drainage projects :