How do you interior a French drain?
To install an interior French drain, a waterproofing contractor cuts a channel into your basement slab around its perimeter. The contractor excavates the ground below the channel, installs perforated drain pipe and a sump pump well, and fills the trench with drainage gravel. The slab is patched with fresh concrete.
Does an interior French drain really work?
Exterior French drains function to divert water around the exterior perimeter of your house. 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.
Are French drains illegal?
BUT In most municipalities, it is illegal to discharge a French Drain System into a city sewer. Also, if the sewer backs up- your basement will flood with sewage. If your home is connected to a septic system discharging into your septic system could lead to a complete septic overload.
How much does it cost to install an interior French drain?
The average cost of an interior French drain is between $50 and $60 per linear foot. Installing an interior drainage system around the basement’s perimeter in a standard, 1,000 square foot home will likely cost around $12,000-15,000.
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.
Do interior French drains cause mold?
They can result in mold, odors, and damage to stored personal belongings. They can affect property value and make sale of a property difficult. In a single word, wet basements are “yucky!” Click Here to Download a PDF Copy of the French Drain Article as Published.
How long do interior French drains last?
Properly installed drains use advanced plastic sheeting called geotextile to protect the drainpipe from a blockage. French drains can last decades before needing maintenance. If your home requires a sump pump, a high-quality model will last around ten years before needing replacement.
How much does a DIY French drain cost?
According to Fixr, the average French drain costs $4,500. An exterior drain located fairly close to the surface could cost as little as $1,000, or $25 per linear foot on average. Drains installed under your basement floor could cost $2,000 or more. Expect to pay $60 to $70 per linear foot for installation.
What is Dimple mat?
A dimple mat is a sheet of semi-rigid plastic (usually high-density polyethylene) that comes in a roll. When a dimple mat is placed against a concrete wall, the dimples make the plastic stand out from the wall, leaving a free-draining air space between the plastic and the concrete.
What’s the best way to make a French drain?
Steps Plot out and mark the path of the French drain. Dig out the floor of your basement along the path of the drain. Grade the bottom of the trench. Place the French drain piping into the trench with the perforations facing down. Connect the piping to the water collection basin. Fill the trench around the piping with drainage gravel.
Why do I need a French drain in my basement?
If you are experiencing repeated problems with a wet basement, and water seepage low to the floor, then an interior French Drain could be the perfect solution. An interior French Drain is a trench providing a channel for the water to flow through and into a sump pump basin.
Can a French drain be installed without pipes?
You can choose to install a traditional French drain without pipes or the modern version. For effective drainage, it is best to install French drains with PVC pipes since it gives water an unhindered path to flow. Here we are going to give you step by step instructions for installing French drain.
Why is a French drain called a footing drain?
The deep french drain is sometimes called a footing drain because it is at the same level as your foundation’s footing and runs along the perimeter of your house. A Deep French Drain collects the water before it reaches your basement.