Exterior Foundation Waterproofing in Montgomery, AL

Exterior foundation waterproofing is the gold standard for keeping basements and crawl

spaces dry. Unlike interior systems that manage water after it enters, exterior waterproofing

stops water before it reaches the foundation. In Montgomery, Alabama, where heavy rain is

common, exterior waterproofing offers the most comprehensive protection.

How Exterior Waterproofing Works

Exterior waterproofing involves excavating the soil around your foundation down to the footing.

The foundation wall is then cleaned, repaired, and coated with a waterproof membrane

(typically a rubberized asphalt or polyurethane liquid). A drainage board (a dimpled plastic

sheet) is attached to the membrane to create an air gap and protect the membrane during

backfilling. A perforated drain pipe (French drain) is installed at the footing level to carry water

to a sump pump or daylight outlet. Finally, the excavation is backfilled. Montgomery

Foundation Repair Co performs exterior waterproofing for both new construction and existing

homes.

When Exterior Waterproofing Is Worth the Cost

Exterior waterproofing is expensive ($15,000‑$30,000 for a typical home) and disruptive to

landscaping. It is most justified when: you plan to finish your basement with expensive finishes;

the foundation walls are already exposed due to other work; the basement has persistent water

problems that interior drains cannot solve; or the walls are bowing and need structural

reinforcement at the same time. For many Montgomery homeowners, interior drainage is

sufficient. Montgomery Foundation Repair Co helps you weigh the costs and benefits.

The Excavation Process

Excavation is the most challenging part. We use a mini‑excavator or backhoe to dig a trench

around the foundation, typically 3‑4 feet wide. Access may require removing decks, patios, or

landscaping. We take care to avoid damaging utility lines (gas, water, sewer). Once the wall is

exposed, we inspect for cracks and repair them with hydraulic cement or injection. After

waterproofing and drainage are installed, we backfill in layers, compacting each layer to

prevent settlement. The entire process takes 1‑2 weeks. Montgomery Foundation Repair Co

coordinates with utility companies and obtains necessary permits.

Long‑Term Benefits

A properly exterior‑waterproofed foundation should stay dry for the life of the home. The

membrane and drain pipe are protected from UV and physical damage by the soil. There are no

mechanical parts (like sump pumps) to fail. The system also relieves hydrostatic pressure,

reducing the chance of future cracking. While the upfront cost is high, exterior waterproofing

adds significant value to your home and eliminates the worry of basement flooding.

Montgomery Foundation Repair Co provides a lifetime warranty on our exterior waterproofing

work.

Frequently Asked Questions