# How Much Gravel Is Needed For A French Drain? (1-minute Read)

Divide 400 by 16 to figure out the number of bags you will need. For example, if you are laying down 2 bags, you would need 2,000 bags.

Everything is explained in that video:

Table of Contents

## How many inches of gravel do I need for a French drain?

Don’t cover the pipe with more than 3 inches of gravel or crushed stone because it won’t cross the ground level. Wrap the excess fabric around it for protection. Place the filter in the bottom of a large bucket. Fill the bucket about halfway with water. Add a few drops of dishwashing detergent to the water to help keep it from sticking to your filter.

If you don’t have a dishwasher, you can use a spray bottle with a small amount of water in it. Place the container in a warm, dry place and let it sit for at least 24 hours before using it again. You can also place it in your refrigerator for a couple of days before use.

## Do you need to put gravel under French drain?

The most reliable way to eliminate undesirable, free-standing water is to install French drains with slotted pipes, filter fabric and gravel. The method of installing French drains used to be without the gravel and fabric.

If you are installing a French drain without gravel or fabric, you will need to add a small amount of gravel to the bottom of the drain. This gravel will help keep the water out of your home. If you do not have enough gravel for the job, then you can use gravel from your yard.

You can also purchase gravel at your local home improvement store.

## How much drainage gravel do I need?

The depth of the excavation should be determined. Divide the area and depth of the excavation by 2 to get the volume in yards. The volume of gravel required is equal to the volume multiplied by the number of feet of excavation: 36 * (2 x 2) = 96.5 yds. Calculate the amount of sand required to fill the excavated area.

We’ll use the same method as in Step 2, but this time, we’ll assume that the sand is in the form of a fine powder. The sand will need to be mixed with water to form a slurry, which will then be poured into the hole. To do this, you’ll need a bucket with a hole in it.

Fill the bucket half-way with sand, then pour in water until the water level is at the bottom. Then, pour the mixture back in, and repeat the process until you’ve filled the entire bucket. This process will take a few hours, so make sure you have plenty of time to complete this step before you leave the house. If you don’t have access to a large bucket, a small one will do just fine.

## What gravel is best for French drain?

Hard rocks such as granite or river gravel can be used for a french drain because they won’t break down as much as other rock types. If you’re looking for something a little more permanent, you can use a cement mixer to mix the concrete into the rock.

This is a good option if you don’t have access to a concrete mixer, but it’s not as easy as it sounds. You’ll need to be careful not to overmix the cement, and you’ll also want to make sure you have enough cement to fill in the gaps between the rocks. If you mix it too thick, it will be difficult to pour it out of the mixer.

## Is 57 gravel good for French drain?

The stone is clean and has an average size of about three quarters of an inch. This is used as drainage stone inside of French drains and in the back of retaining walls and foundations. It is also used to fill in cracks and crevices. Drainage stone is made from a mixture of sand, gravel, and clay.

The sand and gravel are mixed with water and the clay is added to the water to form a paste. When the paste is wetted, it hardens and forms a stone that can be used in a variety of ways. Drainage stones are used for drainage, drainage holes, water storage, filling in gaps and cracks, as well as for decorative purposes.

## Is pea gravel good for French drain?

Coarse rock that has been washed and screened is a good choice for a French drain. The rock in the French Drain is larger than 3/4′′. You end up with large voids that move a lot more water than a pea gravel or pebble.

This will help keep the water out, but it won’t stop the rain from coming in. If you don’t add this layer, the drainage will be too shallow and you will have to fill it back up again. It’s better to have a drainage that’s too deep than not deep enough.

## Should I use landscape fabric in French drain?

The best type of fabric for a drainage project such as a drain field or french drain is non-woven geotextile landscape fabric. If your project requires high strength and good drainage then a high end woven fabric is a good choice.

The most important thing to remember when choosing the right fabric is to choose a fabric that is strong enough to hold up to the weight of your project. This means that the fabric should be able to take a lot of abuse without breaking.

It should also be durable enough that it can be used for many years without needing to be replaced. The warp is the material that makes up your fabric, and it is made up of fibers that are woven together to form the weave. In the case of woven fabrics, this is usually cotton, linen, or polyester.

## Why do French drains fail?

Over time, a French drain may become clogged. Tiny soil and clay particles slip through the landscape fabric and build up inside the pipe. root intrusion from grass, shrubs, and trees is a common cause of French drain problems.