Yes, you can use sand instead of gravel for your French drain when your project calls for it. It is less effective than gravel, but it can get the job done.
EZ Drain is a gravel free french drain alternative that is easy to install with any drainage system.
A French drain is for ground water and certainly uses gravel. You can cover it back up with soil but if surface water is a problem like it is here you'll want a down pipe to connect with your French drain or just use gravel instead of dirt fill.
The best material for a french drain is a mixture of clean sand and gravel. This is better than gap graded aggregate. This would be the typical aggregate used in making concrete, but of course without the cement. There is one other possible problem.
Pea gravel is one of the best materials for landscape drainage because its small size allows for outstanding drainage. These rocks are only about ¾ inches in size. Pea gravel is available in a variety of shades, including brown, grey, blue, and red, making it a good choice for a number of different landscapes.
The Bottom Line
The best type of fabric for a drainage project such as a drain field or french drain is non-woven geotextile landscape fabric. If you're project requires high strength and also good drainage then a high end combination woven fabric could be suitable for your application.
One of the most important parts of the French drain is the gravel because it enables water that has seeped through the ground to be taken away down the slope of the drain. But which gravel is ideal for a French drain? Hard rocks like washed river rock or granite chips are the ideal gravel for French drains.
Use Natural 1-1/2" round rock for best drainage. Washed rock is ideal. Avoid small pea gravel as the spaces in between stone is smaller minimizing flow rates. Avoid Crushed Rock (minus) that compacts and has "fines" that will clog pipe inlets.
If installing the drain involves diverting a stream or affecting a wetland, you likely need a permit to move forward. Generally, a small French drain on your property that doesn't change the flow of runoff entering and exiting your yard won't need a permit.
Traditionally, you would fill it with gravel, but you may wonder if you have any alternatives. Could you instead fill it with sand? Yes, you can use sand instead of gravel for your French drain when your project calls for it. It is less effective than gravel, but it can get the job done.
Clay soil has poor permeability, meaning it doesn't allow water to pass through easily. In such cases, the effectiveness of a French drain may be limited as the water may struggle to drain away from the area efficiently. French drains may not be suitable for areas with high water tables.
The old way of installing French drains is to do it without the gravel and the fabric. Without the gravel and the fabric, however, the drain can clog up with sand and soil over time.
Swales: A Natural Solution
They're a great option if you're looking for a more natural, eco-friendly alternative to French drains. A swale is typically lined with grass or vegetation that helps slow down and absorb water.
River rock tops the list of the best rocks for installing in French drains. Natural round rocks are ideal because their size and shape allows the water to drain more effectively. It's vital to use washed rock because it has been cleaned of debris and particles, which will help prevent clogging the drainage system.
Dig a trench from the place in your yard that needs drainage to your chosen outlet. Check for underground utility lines and pipes before digging. The trench should be about 18 inches deep and 9 to 12 inches wide. least 1 percent, so the force of gravity will work for you.
Description: #57 Stone is a popular lime rock gravel rock choice for drainage, driveways, and erosion control base material. Because of its cheaper cost, it is often used in french drains and in parking lots.
Non-Woven Drainage Fabric
That's why non-woven fabrics are the top choice for creating a landscape drainage system. These can be used for french drains, along with GeoCell bases, and nearly every other water filtration option. You can also purchase non-woven geotextile fabrics in a variety of densities and sizes.
A French drain installation is widely recommended to utilize a 4-inch perforated pipe according to industry standards, the velocity requirements of the water flow, and the potential connections for downspouts.
Pea Gravel: Small, smooth, and round, pea gravel is both aesthetically pleasing and effective in allowing water to pass through quickly. River Rock: Larger and more decorative, river rock can be the best choice for a significant drainage project. It offers a balance between functionality and landscape aesthetics.
Do NOT Use Pea Gravel, Pea Pebble, Pea Stone When Building a French Drain. When building a French drain, you want to use a coarse rock that has been screened and washed. The rock that you see in this French Drain is 3/4″ and larger. You end up with large voids that'll move far more water.
Clogging and Blockages
Clogging is one of the leading causes of French drain failure, often due to root intrusion or sediment build-up.
Add and compact 3 inches of coarse drainage gravel in the trench. Place the perforated pipe on top of the gravel in the trench.