Sandy soil will make removing the soil for the trench easier, especially if you plan to do it by hand with a shovel. If you have soil that is thick or rocky, you may need to buy or rent a trench digging tool to make digging easier. Part 2. Use slotted PVC pipe for a more rigid drain.
PVC pipe is a good option if you plan to a run a drain that does not snake around any objects or plants. It creates a strong, rigid drain for a trench with a straight slope downward. Go for corrugated pipe with slots for a more flexible drain. If you need a French drain that can snake around trees or landscaping, use corrugated pipe.
Make sure the corrugated pipe has slots so it can drain properly. But this can also make it prone to leaks and tears. Look for perforated pipe already encased in water-permeable fabric. You can buy perforated pipe that has already been wrapped in fabric at your local hardware store or online. This pipe is often sold as an easy install for home improvement projects.
Get 4 or 6 inches 10 or 15 cm wide pipe for the drain. This size will allow water to move through the pipe easily in a steady flow. Pipe that is too narrow can cause the water to pool or trickle too slowly when it rains. Pipe that is too wide can take up too much space in the trench and allow debris to get into the drain. Measure the location to get the right amount of pipe. Use a measuring tape to determine how long the pipe is going to be in the trench.
Start at the beginning of the trench and measure down to the bottom of the trench. You may want to add a few extra inches to the measurement so you have more than enough pipe.
You can then cut the pipe down to size when you put the French drain in. Part 3. Get the location checked by your utility company to confirm it is safe to dig. Before you dig, call your utility company and ask them to inspect the area for any power lines or underground lines that cannot be touched or moved.
They must give you all the clear for you to be able to dig the trench in the location safely. Most trenches are permissible as long as they are on your land and are not too large or deep. Call your local city building department to double check.
Dig a shallow trench to redirect surface water. The trench should be 2 feet 0. This will ensure the drain can catch any water on the surface of your property near your home and channel it away to a safe draining spot. Create a deep trench if you want to avoid flooding in your basement.
The trench should run around the entire perimeter of your home at footing level. This is a deep trench that will require significant construction and effort. You may want to rent trench-digging tools to make the job easier. If you want to avoid digging a trench this deep or the area does not have enough slope, you can run a pipe down to the basement to direct water into a basin and use a sump pump to lift out the water.
This is a different method than using a French drain. Cleanouts make it easy to clear your drain tile system off debris without having to dig up pipes. A cleanout fitting is a tee that is installed slightly above grade, with a cap for easy access to the drain. If the drain tile system starts to get blocked with debris, you can easily insert a garden hose through the cleanout port to flush the system.
For blockages which are a bit harder to remove, you can use an auger. Table of Contents. The landscape fabric needs to overlap in the direction of the desired flow. Fabric on the high side of the trench should be overlapped on top of the fabric on the low side of the trench. Fill the trench with course drainage gravel, such as crushed granite, so it is flush with the surrounding ground or sod.
Rake the top of the gravel so it is smooth and even with the top of the trench. Alternatively, you can overfill the trench slightly and rake the gravel into a mound highest in the center so the trench is more visible. Trim excess landscape fabric along the edges of the trench using a utility knife. Call a professional if excess surface water runs or collects near your house or leads to seasonal flooding inside the house.
Likewise, seek expert advice if your planned trench route brings water near or even closer to your house or might affect natural runoff patterns. Improperly designed drainage systems can do more harm than good. Significant drainage problems may call for regrading of large areas of the landscape, and this requires engineering and heavy equipment. Actively scan device characteristics for identification.
Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads.
Apply market research to generate audience insights. Another common failure is the pipe perforations become clogged with dirt and debris. This is why the drain pipe and gravel should be wrapped in a permeable fabric.
This linear foot measurement is the distance from beginning to end of the drainage system. Determining the proper grade and length for your drainage system requires doing a thorough examination of your property. Therefore, some professional installation companies might charge you an initial fee for a site evaluation and estimate. Yes, you can absolutely install a French drainage system yourself.
It will take some planning, lots of digging, hauling of rock material and installing new sod in some cases but all of the materials are readily available at your local hardware store. Some hardware stores have even started selling prefabricated French drain pipe with the protective layers and aggregate already assembled for DIY projects. Before you start digging, have your utility lines marked and consider investing in some grading tools like those used in masonry stonework such as line levels, grade stakes and mason string to help you determine the proper slope needed.
Installing a French drain system is not always the answer for small problem areas. Installing a French Drain 10 Common Questions. September 27, , Landscape Drainage. Why install a French drain?
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