Keep Retaining Walls Strong and Leak-Free
What We Fix with Retaining Wall Waterproofing
Soil Water Pressure
Leaks & Stains
Weakening Walls
Fast Leak Protection
Long-Term Retaining Wall Protection
How we work
1.
Quote
2.
Fix
3.
Guarantee
Methods We Use for Retaining Wall Waterproofing
Retaining Wall Waterproofing built for heavy rain and saturated soils
Our results speak for themselves
What our clients are saying
"I want to publicly thank the team at ITA CORP for the extremely professional and reliable work they did recently on our patio roof. We've struggled with leaks for years, and now, with ITA CORP on the job, I feel comfortable since Malvern is conscientious, eager to help, knowledgeable, and his communication and follow-up is amazing."
"Itacorp have provided excellent services and quality workmanship throughout the years. Any comeback is dealt with immediately/timeously.
Itacorp takes pride in their workmanship. Recommended."
"Itacorp has helped me a lot with dampness walls, slabs water proofing, as well as storm water drain system that has given me years of problem. knowledge and service is out of this world, thank you Malven Makura.😀"
"I want to extend a big thank you to ITA CORP for the outstanding work they did on my house. From start to finish, their professionalism, attention to detail, and quality of workmanship were exceptional. It’s rare to find a team that delivers exactly what they promise—and they certainly did. Highly recommended for anyone looking for reliable, top-notch service!"
"I have had the pleasure of several dealings with Melvern and his professional team where the work done has always been above & beyond expectations and have no hesitation in referring his company."
"We have had serious issues with water damage that was driving us insane. Malvern’s team waterproofed our bathroom and fixed what another contractors managed to damage."
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Why Retaining Wall Waterproofing Matters More Than Most Think
Retaining walls do more than hold back soil, they hold back water pressure. In Johannesburg, where rain often saturates clay heavy ground, that moisture builds up behind retaining walls and forces its way through even the smallest cracks. Over time, this leads to damp stains, structural weakening, and costly damage to adjoining areas such as basements, driveways, and boundary walls.
Retaining wall waterproofing is not just a surface fix. It is an engineered system that manages both hydrostatic pressure and moisture migration, ensuring the wall remains strong, dry, and stable for years.
If dampness has spread into nearby interior spaces, see our interior damp proofing service for complete protection.
Why Our Retaining Wall Waterproofing System Works
Many retaining wall leaks occur because contractors focus only on sealing the front of the wall, the visible side, instead of the soil facing side where the water pressure actually builds. Our system is designed from the ground up to solve the real problem.
We waterproof from the soil facing side whenever possible, applying a flexible, pressure resistant barrier that can handle the constant load of saturated soil. We also use drainage channels, membranes, and damp proof coatings that relieve water buildup and redirect it away from the structure. The result is a wall that stays completely dry, even during Johannesburg’s heaviest storms.
Who Needs Retaining Wall Waterproofing
Our services are ideal for:
Homeowners with damp or stained retaining walls near driveways, gardens, or basements.
Developers building retaining systems on sloped properties or cut embankments.
Commercial property owners managing parking or boundary walls that face water seepage.
Engineers and builders requiring long term waterproofing as part of structural design compliance.
If you notice water marks, mould growth, or fine cracks on the face of your retaining wall, waterproofing is not optional, it is essential to prevent further damage.
For issues caused by poor surface drainage directing water toward retaining walls, also see our slope correction and drainage service.
The Problems We Solve
Hydrostatic pressure buildup that pushes water through concrete and brickwork
Seepage and damp stains appearing on the visible side of the wall
Structural weakening from continuous water infiltration
Cracking and spalling caused by moisture expansion and freeze thaw cycles
Adjacent leaks into garages, basements, or garden retaining structures
By sealing the structure and controlling the water behind it, we prevent both immediate leaks and long term structural stress.
The Long-Term Benefits of Retaining Wall Waterproofing
A properly waterproofed retaining wall not only stops leaks but also protects the entire property from hidden water damage. Once sealed, the wall resists both moisture and soil movement, keeping surfaces dry, clean, and structurally sound.
Our clients often see immediate improvements, no more water stains, mould, or damp odour, and enjoy the long term benefit of reduced maintenance costs and extended wall life.
If leaks are spreading into lower levels like basements or underground areas, view our basement waterproofing service for deeper structural protection.
How We Waterproof Retaining Walls the Right Way
Inspection and Pressure Assessment – Identify weak points, soil conditions, and water flow behind the wall.
Surface Preparation and Repair – Clean and repair cracks, ensuring a strong base for adhesion.
Barrier and Membrane Application – Apply liquid rubber, torch on, or acrylic systems on the soil facing side.
Drainage Reinforcement – Install weep holes or drainage layers where needed to relieve water pressure.
Finishing and Testing – Apply protective coatings and verify watertight performance before backfilling.
Frequently Asked Questions
Can waterproofing be done on existing retaining walls?
Yes. We use advanced coatings and injection systems that seal existing walls from the inside or outside, depending on access.
What is the main cause of retaining wall leaks?
Water pressure from saturated soil. Without waterproofing and drainage, this pressure forces moisture through the wall.
How long does waterproofing last?
Our systems typically last 10 to 15 years depending on exposure and soil conditions.
Do you include drainage solutions?
Yes. Where required, we add weep holes or subsoil drainage systems to manage groundwater effectively.
Do you guarantee your work?
Absolutely. All retaining wall waterproofing comes with a workmanship guarantee and material warranty.
If your retaining wall shows damp stains or leaks after rain, it is time to act before structural damage sets in. Contact us today for professional retaining wall waterproofing in Johannesburg, durable protection built for local soil conditions and proven to last.
Service Areas
We provide professional flat roof waterproofing across Johannesburg, including:
Sandton, Midrand, Bryanston, Fourways, Bedfordview, Rosebank, Melrose, Hyde Park, Randburg, and surrounding suburbs.