Interior Drainage Systems in Montgomery, AL

Interior drainage systems are the most reliable way to keep basements and crawl spaces dry in

Montgomery, Alabama. Rather than trying to seal every crack in the foundation, these systems

collect water after it enters and safely channel it to a sump pump. For homes built on

expansive clay, interior drainage offers a cost‑effective, long‑term solution to hydrostatic

pressure problems.

How Hydrostatic Pressure Causes Water Entry

When heavy rain saturates the clay soil around your Montgomery home, the water table rises.

The weight of the water (hydrostatic pressure) pushes moisture through any opening in the

foundation—cracks, the cove joint, or even porous concrete. Exterior waterproofing attempts

to block this pressure, but no coating is perfect. Interior drainage accepts that some water will

get through but removes it so quickly that it never reaches your finished floors or damages

stored items. Montgomery Foundation Repair Co designs interior drainage systems to handle

Montgomery’s worst 100‑year rain events.

Components of an Interior Drainage System

A complete interior drainage system includes four main parts. First, a trench is cut around the

interior perimeter of the basement or crawl space, typically 6 to 12 inches from the wall.

Second, a perforated drain pipe is laid in the trench on a bed of washed gravel. Third, the

trench is covered with concrete or a drainage panel to create a clean floor surface. Fourth, a

sump pump basin is installed at the low point of the trench, and a pump is placed inside. Water

flowing into the trench travels by gravity to the sump pit, where the pump ejects it outside.

Montgomery Foundation Repair Co uses only heavy‑duty cast iron sump pumps with battery

backups.

Installing Interior Drainage in Finished Basements

Adding an interior drain to an already finished basement requires more care but is still possible.

Montgomery Foundation Repair Co cuts a channel through the slab near the walls, removing a

6‑ to 12‑inch strip of concrete. We install the drain pipe and gravel, then pour new concrete

that can be matched to the existing floor height. Baseboards and drywall may need to be

removed temporarily and reinstalled. In some cases, we can install the drain outside the

finished area, such as along a wall that is still unfinished. We always work to minimize

disruption and clean up thoroughly.

Maintaining Your Interior Drainage System

Once installed, interior drains require occasional maintenance. The sump pump should be

tested every six months by pouring water into the pit to ensure it activates. The pump’s intake

screen should be checked for debris. If you have a battery backup, test the battery and replace

it every three to five years. Montgomery Foundation Repair Co offers annual maintenance

contracts that include pump testing, battery checks, and drain inspections. Proper

maintenance ensures your system works when you need it most—during a spring

thunderstorm when power outages are common.

Frequently Asked Questions