French Drain Installation in Montgomery, AL

French drains are a simple yet effective way to keep water away from your Montgomery,

Alabama home. A French drain is a trench filled with gravel that contains a perforated pipe,

which collects and redirects groundwater away from the foundation. Proper French drain

installation can prevent foundation settlement, basement leaks, and crawl space flooding by

reducing soil moisture around your home.

Where French Drains Are Needed in Montgomery

French drains are most beneficial when you have persistent wet spots in your yard, water

pooling against the foundation after rain, or a basement that leaks during heavy storms. In

Montgomery’s clay soil, surface water often cannot soak in quickly enough, leading to runoff

that flows toward the house. A French drain intercepts this water before it reaches the

foundation. Montgomery Foundation Repair Co also installs French drains along the uphill side

of homes built on slopes (even slight slopes) and around problem areas like downspout

discharge points.

French Drain Installation Process

Installing a French drain begins with digging a trench of appropriate depth and slope—typically

1 to 2 feet deep with a 1 percent slope (1 foot of drop per 100 feet). The trench should be lined

with landscape fabric to prevent fine soil from clogging the gravel. Then a 2‑ to 3‑inch layer of

clean, washed gravel (no fines) is placed at the bottom. A perforated PVC or corrugated pipe is

laid on the gravel with the holes facing downward. More gravel is added until the trench is

nearly full, then the fabric is wrapped over the top. Finally, the trench is covered with topsoil

and sod. Montgomery Foundation Repair Co ensures that the drain discharges to a safe

location, such as a storm drain, dry well, or daylight at the property line.

French Drains vs. Interior Perimeter Drains

Many homeowners confuse French drains with interior drain systems. A French drain is

installed outside the foundation and is designed to intercept water before it reaches the

footing. An interior drain is installed inside the basement or crawl space and collects water that

has already entered. For most Montgomery homes, exterior French drains are tried first

because they are less expensive and prevent the problem at the source. However, if the water

table is high or the soil is very impermeable, an interior drain may still be needed. Montgomery

Foundation Repair Co can install either system or combine both for maximum protection.

Maintaining Your French Drain

French drains require very little maintenance if installed correctly. The most common problem is

clogging from silt or roots. To prevent this, we always use landscape fabric and washed gravel.

Every two to three years, you should inspect the drain outlet to ensure water is flowing freely. If

you notice standing water near the drain line, the pipe may be clogged. Montgomery

Foundation Repair Co offers drain cleaning services using high‑pressure water jetting. Trees

with aggressive roots (willows, poplars, silver maples) should not be planted near French

drains.

Frequently Asked Questions