Retaining walls carry both soil weight and water pressure. When Gauteng’s clay soil gets saturated in summer, it expands hard against the wall face. We see structural stress and waterproofing failure in properties from the sloped stands around Walter Sisulu National Botanical Garden in Roodepoort to the tiered gardens in northern Johannesburg. Call 081 016 3479 for a free assessment.
When You Need Retaining Wall Waterproofing
Retaining wall waterproofing is needed when you see weeping or seeping water through the face of a wall, efflorescence on the exposed face, cracking along the wall face, or if the wall is bulging or showing signs of movement. Water adds significant weight and pressure to retained soil, a fully saturated clay bank behind a retaining wall exerts much more force than dry clay. Over time, water ingress combined with soil movement can cause structural failure.
Our Retaining Wall Waterproofing Process
Where soil-side access is available, we excavate behind the wall, clean the concrete or masonry surface, apply a bituminous coating or torch-on membrane, and install drainage board with an agricultural drain at the base to redirect groundwater away from the wall before backfilling. Where access is limited, we apply a crystalline penetrating waterproofing system from the face of the wall, which works against hydrostatic pressure from the water side. Weep holes are inspected and cleared.
Cost of Retaining Wall Waterproofing in Gauteng
Cost depends on wall length, height, excavation required, and system specified. Free on-site assessment and written quotation.
Why Choose Logiline for Retaining Wall Waterproofing
Licensed and insured. Workmanship Warranty. We assess both structural and waterproofing requirements, if we see signs that go beyond waterproofing, we’ll tell you. Serving all of Gauteng.
Common Questions
How do I know if my retaining wall needs waterproofing?
Does a retaining wall need drainage as well as waterproofing?
Can a retaining wall be waterproofed from the front face?
Retaining wall showing damp or movement? Call 081 016 3479 for a free assessment.
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Further reading: waterproofing, building waterproofing materials and techniques.