How to install interior french drain

How deep should an interior French 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.

How much does it cost to install an interior French drain?

French Drain Installation Costs

Item Cost
Sump Pump $175-$225
Excavation and labor costs $35-75 per hour
Interior French drain $5,500-$6,000
Exterior French drain $900-$1,500

Are interior French drains effective?

Interior French drains , on the other hand, function to divert and carry away water and moisture out from the interior of your basement. This is one of the most effective systems for treating severe damp problems in basements. This assists to keep debris particles filtering into the pipe and clogging the system.

Does a French drain need to be sloped?

French drains need to have a slope of at least 1 percent, so the force of gravity will work for you. This means that the drain should slope down a total of at least one inch for every 10 feet of pipe.

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.

Does a French drain add value?

You can get on average a 90.1 percent return at resale for basement improvements. You must always fix the flooding issues first. To do so, you can add French drains or bigger gutters.

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Is a French drain worth it?

If you’re dealing with a wet basement or a soggy lawn, you might want to look into installing a French drain . While it’s not necessarily a “quick fix,” a French drain can be a smart investment to keep your home and yard dry.

How long will a French drain last?

approximately 30 to 40 years

Do French drains cause mold?

Water damage, when left unaddressed, can cause more severe problems as it can compromise the integrity of the structure of your home, and lead to mold and mildew growth, which can adversely affect the health of your family.

Do French drains smell?

The mold spores, odor and evaporating moisture will travel into the house through the opening in the french drain system. If you already have a radon system installed, a french drain system can pull combustion gases from your appliances back into a home.

How deep should a French drain be in a basement?

The trench should be at least 2 feet wide, and can be as deep as 6 feet for a basement or as shallow as two feet for a slab-on-grade home. Lay the pipe on the virgin soil.

What is the difference between a French drain and a trench drain?

The main difference between the two is that French drains capture and remove groundwater while trench drains quickly remove surface water before it can saturate the ground.

Can you cover a French drain with dirt?

The simplest drain is a classic French drain , which is nothing more than a trench filled with coarse stone or gravel. The drain can be left open or, if aesthetics are a concern, can be covered with a couple of inches of topsoil and sod.

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Where do you end a French drain?

Which End is Up? The two ends of a French drain system are: The drain field, or high end , where excess ground water enters the drain pipes. The drain exit, or lowest point, where water leaves the system.

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