Quick Answer: Do French Drains Cause Mold?

How do you tell if you 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..

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).

Is radon only in the basement?

Is radon only in basements? Radon is completely odorless as well as being invisible. Because it is often found unexpectedly in basements, some people mistakenly believe that it only occurs in basements. This is a dangerous assumption that may damage your ability to protect your home if you are not careful.

Are French drains necessary?

If you’re dealing with a permanently damp area in your lawn or end up with water in your basement after a heavy rain, there’s an easy solution — a French drain outside or inside your home. It’s essential you have good drainage to ensure your house remains dry and mold-free.

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.

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.

What kind of pipe should I use for a French drain?

French Drain Pipe Characteristics One of the most common pipe materials used to create a French drain is plastic because of its durability. There are two frequently chosen pipe variations: corrugated and PVC. Both are lightweight, but corrugated pipe can be flexible, while PVC is stronger and more rigid.

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

The main difference is that french drains deal more with groundwater while curtain drains have more to do with surface water. Curtain drains are built in a very similar way to french drains but are dug to a shallow depth.

How far should a foundation be from a French drain?

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 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.

Do French drains allow radon in?

Homes that have sumps or French drains for control of rainwater can be effectively mitigated utilizing the sump to collect radon from the underlying soil. Two types of drainage systems can be readily adapted to collect radon from the soil below a house and exhaust it safely outside.

What size gravel is best for French drain?

For the best drainage, look for coarse washed rock (gravel) that is screened, with a stone size of 1/2 to 3/4 inch. Smaller rock with fine particles could clog the holes of the drain pipe. Pea stone works, but the smooth stones settle together and don’t move as much water as coarse rock.

Does a French drain work?

Properly constructed, french drains will work well to transmit water from the pipe to the exit of the pipe; however, they are not very efficient in dewatering poorly drained soils. Adequate fall means at least 2 ft lower per 100 ft of pipe or 0.25 in. per foot of slope.

Does sealing a basement floor reduce radon?

Sealing the basement floor can help reduce the amount of radon entering the home. … Sealing all cracks and applying non-porous, thick epoxy coatings (over 10 MILS dry film thickness) would be a better step.

Where should French drain end?

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.

How do I know if my house has a French drain?

French drains are covered with gravel. If you see a bed of gravel on a sloping piece of land, use your shovel to see if there is a drain pipe underneath.

What is a French drainage system?

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 reduce radon by opening windows?

As a temporary solution, however, you can reduce radon levels simply by opening windows. Opening windows improves air circulation and ventilation, helping move radon out of the house and mixing radon-free outside air with indoor air. Make sure all your basement windows are open.