- What’s the purpose of a French drain?
- Can you do a French drain without pipe?
- How do I dig a French drain around my house?
- Are French drains good or bad?
- How deep should a curtain drain be?
- Do holes go up or down in a French drain?
- How long will a French drain last?
- What size gravel is best for French drain?
- What does a curtain drain do?
- Should I use PVC or corrugated pipe for drainage?
- Is a French drain worth it?
- How far should a French drain be from the house?
- Can you cover a French drain with grass?
- Do French drains get clogged?
- What is the best pipe to use for underground drainage?
- Can you use landscape fabric for French drain?
- How do I know if I need a French drain?
- Why do French drains fail?
- Do French drains need an outlet?
- Can I install a French drain myself?
What’s the purpose of a French drain?
A French drain is a trench filled with a perforated pipe and gravel that allows water to drain naturally from your yard.
Depending on the size of your yard and the scale of your drainage issue, you can purchase the pipes and equipment to create a French drain yourself..
Can you do a French drain without pipe?
Installing a French Drain Without a Pipe You don’t always need a base, though. If your soil drains well, you can simply dig the trench and cover the bottom with 3 to 4 inches of 3/4-inch drainage rock, depending on the depth of the trench.
How do I dig a French drain around my house?
Here’s how to do it:Dig a trench along the outside of your footing. … Lay the pipe on the virgin soil. … Cover the pipe with at least 12 inches of washed gravel.Lay filter fabric over the gravel to prevent any soil from clogging the pipe.Back-fill the foundation with top soil back to its original grade height.
Are French drains good or bad?
Both said dumping roof water into the French drainage system is a bad idea. On reflection, we agree. The purpose of a French drain is to direct groundwater away from the foundation. … The volume of water discharged into the system during a heavy rain risks directing water toward the foundation instead of away from it.
How deep should a curtain drain be?
French drain depth: About 8 inches to 2 feet deep should be sufficient for many water-diverting projects, though related systems, such as those built around foundations and sub-ground living spaces, as well as the bases of retaining walls, may be deeper.
Do holes go up or down in a French drain?
When you lay your PVC pipe, the rows of holes should always be facing the downward position. You want to keep the water level in your French drain as low as possible at all times, and you can’t achieve this if the holes are facing upwards or sideways.
How long will a French drain last?
approximately 30 to 40 yearsGenerally speaking, a French drain will last approximately 30 to 40 years.
What size gravel is best for French drain?
Gravel used for this layer is typically 1/2 inch to 1 inch across — the larger it is, the better the water flow and less chance of clogs and blockages. For a French drain without a perforated pipe, opt for even larger gravel, such as 1 1/2 inches across.
What does a curtain drain do?
A French drain, or curtain drain, removes excess surface water so you won’t need hip boots to cut the grass. A French drain, sometimes called a curtain drain, is a simple system with no moving parts — gravity removes excess water from problem areas in your yard.
Should I use PVC or corrugated pipe for drainage?
While landscapers use “non-rigid corrugated NDS pipes,” we use drainage grade PVC pipe because it is more durable and longer-lasting, especially when buried under heavy materials like soil. The corrugated pipe is cheaper but not nearly as strong.
Is a French drain worth it?
French Drains are Worth the Money French drain installation designed to redirect water away from the basement are more expensive than other varieties yet you should not be scared away by the price!
How far should a French drain be from the house?
A French drain consists of buried perforated pipes slightly sloped to easily channel water flow, in this case, away from the house foundation. Start by digging a 2-foot-deep-by-18-inch-wide trench 2 feet or so away from the foundation at the highest point where the rear yard meets the foundation.
Can you cover a French drain with grass?
The simplest drain is a classic French drain, which is nothing more than a trench filled with coarse stone or gravel. A 2–4% slope is adequate to quickly move water away from trouble areas. The drain can be left open or, if aesthetics are a concern, can be covered with a couple of inches of topsoil and sod.
Do French drains get clogged?
French drains need annual maintenance Despite the design’s best efforts, French drains get clogged by dirt, debris and silt. They do need to be cleaned out regularly – about once per year – to ensure that they continue to direct water away from the building’s foundation.
What is the best pipe to use for underground drainage?
High-Density Polyethylene (HDPE, often just “PE”) has become one of the most popular choices for underground service lines, thanks to its corrosion-resistance, durability, and competitive price. Some codes require that buried plastic lines under 2″ in diameter be PE (rather than PVC).
Can you use landscape fabric for French drain?
A landscaping French drain is a gravel-filled trench lined with landscape fabric to keep soil and silt out of the gravel. While some types of these drains include a perforated drain pipe (sometimes called drain tile) and may be covered with grass, the traditional French drain is simpler and easier to build.
How do I know if I need a French drain?
When You Need a French DrainWhen you have a problem with surface water, such as a soggy lawn or a driveway that washes out.If water is getting into your basement.If you’re building a retaining wall on a hillside.
Why do French drains fail?
This is the process by which small particles of clay and silt are stopped by the fabric and, over time, the fabric becomes stopped up and will no longer allow passage of water. When enough sand, clay or silt gets past the fabric, the gravel spaces fill and the effectiveness of the french drain ends.
Do French drains need an outlet?
A properly designed French drain system does not require an outlet. The water will simply soak into the soil as it flows along the perforated pipe. In fact, a French drain doesn’t require an inlet on just one end either. You can construct the drain to accept water along its length, and disperse it underground.
Can I install a French drain myself?
We recommend that you don’t install a French Drain yourself unless you’re already a lawn and garden professional, but here’s how it works: Dig a trench about two feet wide in your needed area and as much as six feet deep depending on the location (basement, retaining wall, or other areas, for example).