Retaining Wall Waterproofing in Montgomery, AL

Retaining walls in Montgomery, Alabama are constantly exposed to water from rain and

irrigation. Over time, water seeping through the wall can cause cracking, efflorescence, and

structural failure. Retaining wall waterproofing extends the life of your wall and protects your

foundation.

Why Waterproof a Retaining Wall

Water is the primary cause of retaining wall failure. When soil behind the wall becomes

saturated, it exerts hydrostatic pressure that pushes the wall outward. Water also freezes and

thaws (though rarely in Montgomery), causing cracks. And water carries fine soil particles

through cracks, leading to erosion and voids. Waterproofing prevents water from penetrating

the wall, reducing pressure and preventing deterioration. Montgomery Foundation Repair Co

includes waterproofing as part of our comprehensive retaining wall services.

Waterproofing Methods

Several methods are effective. Exterior waterproofing involves applying a liquid membrane

(asphalt‑modified polyurethane or rubberized asphalt) to the back side of the wall before

backfilling. This membrane bridges small cracks and keeps water out. For existing walls, we

can install a drainage composite (a dimpled plastic sheet) against the wall to create an air gap,

then cover with gravel. Interior waterproofing (from the front side) is less common but can be

done with penetrating sealers. Montgomery Foundation Repair Co selects the method based

on wall access and condition.

Drainage as Part of Waterproofing

Waterproofing alone is not enough; you also need drainage to remove water from behind the

wall. We install a perforated drain pipe at the base of the wall, surrounded by gravel, to carry

water to a discharge point. Weeps holes (small openings in the wall) allow water to escape.

Without drainage, waterproofing can trap water against the wall, increasing pressure.

Montgomery Foundation Repair Co always designs drainage and waterproofing together for a

complete solution.

Benefits of Waterproofing

Waterproofed retaining walls last significantly longer—often 50+ years compared to 20‑30

years for untreated walls. They require fewer repairs and look better (no efflorescence or

spalling). They protect the foundation of your home by preventing water from pooling near it.

And they increase property value by providing a durable, attractive landscape feature. For new

retaining wall construction, waterproofing adds only a small percentage to the total cost. For

existing walls, it is a wise investment.

Frequently Asked Questions