
French Drains and Other Remedies for a Wet Basements
By Bill Primavera
The Home Guru
Usually when a noun is preceded by the adjective French, it suggests something either fattening (like fries) or intriguing (like the Connection), but when French precedes the word drain, it identifies a practical measure to maintain a dry basement.
The French drain is simply a trench filled with gravel traversed by a perforated PVC drain pipe that diverts excess ground water away from the house. Oh, and it’s not really French in origin, but was popularized by a New Englander named Henry French who wrote about it in the mid-1800s.
Never have I heard the term used more often than since the storm Irene pummeled the East Coast, flooding streets, lawns and basements.
The first time I looked at my house as a prospective buyer, before I knew of French drains, I recognized that it had water issues in the basement. Where the stone walls met the concrete floor, it was damp. The owner told me that the occurrence was attributed to the fact that we have a high water table in this area, but I’ve learned that this condition doesn’t mean we have to live with dampness in our basements.
When I was younger, it was always difficult for me to spend money on my home where the results didn’t “show.” As I get older, I’ve learned that the unseen is often the most important aspect of home ownership.
A wet basement is an indicator of troubles to come, such as rotted wood, fungi, mold and insect problems. And, moisture creates a perfect environment as a breeding ground for termites and carpenter ants which can literally eat you out of house and home.
Then, there is the psychology of a wet basement. Data shows that people are usually unwilling to buy a home with water leakage problems, thereby decreasing the value of the home significantly when trying to sell it. Most realtors will try to convince sellers to fix basement leaks before putting their homes on the market.
There are three main areas of attack for the problem.
First it’s important to check the sump pump to make sure that the water is being properly drained before it reaches the basement floor. A failed sump pump can result in costing a home owner much more than the cost of replacing the sump pump. Next, gutters and downspouts should be cleaned regularly to make sure that water from the roof is diverted from the house. And, finally, a French drain may be needed.
French drains can be installed around a home foundation in two different ways. It can be buried around the foundation wall on the exterior or installed underneath the basement floor on the inside perimeter of the foundation walls. The external drain is normally installed when the home is being built and before the foundation soil is backfilled. A layer of stone is laid at the bottom of the excavated foundation with a drain pipe running through it. Usually a filter fabric in laid on top of the stone to prevent fine sediments from entering and clogging the drain.
Installing a French drain around the inside perimeter of the basement is most often done in homes that are already built. The perimeter of the basement is jack hammered down to the footing and the cement is removed. Again, a layer of stone is laid down and the drain pipe is placed on top of it. With this installation, water is collected as it enters from the basement wall floor joint and is delivered to the sump pump, diverting the water out of the basement and away from the foundation.
A French drain can be a D-I-Y project if you’re into a lot of digging. With the sweat labor, this can be quite inexpensive, costing as little as a few hundred dollars for the materials. But, most of us would have to rely on the experience of a professional to get the job done and that can run into several thousands of dollars, whether installed externally or internally.
Who do you call for advice? Most local contractors provide exterior drain installation. Online, there is a good source of information from a franchised company in the Northeast called Vulcan Waterproofing, the granddaddy of waterproofing companies which claims to have set the standard for the process.
What I like about the company’s website is its generosity in providing a comprehensive section about what you can do on your own to address leaks in the basement, from repairing cracks in basement walls to applying waterproofing paints and epoxies. There are other practical suggestions, such as sloping planting areas away from the house on a 25 degree angle for at least five feet from the foundation wall. The information can be found at: www.vulcanwaterproofing.com.
Never since I’ve lived in this area have I more frequently had people say goodbye to me with the phrase, “stay dry.” And with the extreme weather conditions we’ve experienced as late, I bid you that same good wish, especially in your basement.
Bill Primavera is a licensed Realtor® (www.PrimaveraHomes.com), affiliated with Coldwell Banker, and a marketing practitioner (www.PrimaveraPR.com). For questions or comments about the housing market, or selling or buying a home, he can be reached directly at 914-522-2076.


