Structural Waterproofing services
What Structural Waterproofing Really Involves Below Ground
Structural waterproofing is not a surface level fix. It is about controlling how water behaves around and through concrete structures that are in constant contact with soil, groundwater, and hydrostatic pressure. This includes slabs, foundations, basement walls, retaining walls, and underground tanks.
Unlike above ground waterproofing, these structures cannot rely on coatings alone. Water will always look for the weakest point, whether that is a construction joint, hairline crack, poorly compacted backfill, or failed drainage. Effective structural waterproofing requires a combination of correct system selection, proper detailing, pressure management, and long term durability.
In Johannesburg conditions, this is especially important due to clay soils, seasonal rainfall patterns, and fluctuating water tables that place ongoing stress on below ground structures.
Why Our Structural Waterproofing Approach Works
Our approach starts with understanding how and why water is entering the structure, not just where it is visible. Many structural failures happen because the waterproofing system was selected without considering soil conditions, water pressure, or movement in the structure.
We design solutions that work with the structure, not against it. This often includes combining membrane systems, drainage layers, crack treatment, and protection measures to ensure the waterproofing remains intact over time.
With over 30 years of experience, we have seen what fails and why. That experience informs every system we install, especially in complex below ground applications where repairs are costly and access is limited once construction is complete.
Who Structural Waterproofing Is For
Structural waterproofing is essential for:
• Residential homes with basements, split level designs, or retaining walls
• New builds requiring compliant foundation and slab waterproofing
• Commercial buildings with below ground parking or service areas
• Industrial sites with underground tanks or water retaining structures
• Property owners dealing with persistent damp, seepage, or structural cracking
Whether it is preventative waterproofing on a new structure or corrective work on an existing one, this service is for property owners who want long term protection, not repeated repairs.
Problems Structural Waterproofing Solves
Structural waterproofing addresses issues that standard waterproofing cannot, including:
• Water ingress through basement walls and floor slabs
• Rising damp and moisture migration through foundations
• Seepage and staining on retaining walls
• Hydrostatic pressure causing cracks or structural movement
• Leaking underground tanks or chambers
Left untreated, these problems lead to mould growth, corrosion of reinforcement, weakened concrete, and reduced property value.
Benefits and Long Term Outcomes
When structural waterproofing is done correctly, the results are measurable and long lasting.
• Dry, usable basements and below ground spaces
• Protection of structural integrity and reinforced concrete
• Reduced risk of future cracking and water related damage
• Improved indoor air quality and healthier environments
• Increased property value and lifespan of the structure
Our systems are designed to perform under pressure and remain effective for years, not just through the next rainy season.
How Our Structural Waterproofing Process Works
We follow a methodical process to ensure the right solution is applied.
Assessment and diagnosis
We inspect the structure, identify water entry points, and assess soil conditions, drainage, and existing waterproofing where applicable.
System selection
Based on the findings, we select waterproofing systems suitable for the specific structure and exposure conditions.
Surface preparation and repairs
Cracks, joints, and defects are properly repaired before waterproofing is applied. Preparation is critical to performance.
Installation and protection
Waterproofing systems are installed according to manufacturer specifications and protected where required to prevent damage during backfilling or use.
Final checks
We ensure continuity of the system and address any vulnerable details before sign off.
Structural Waterproofing FAQs
Is structural waterproofing only for new buildings
No. Many existing buildings require corrective structural waterproofing due to failed systems or changes in ground conditions over time.
Can basement waterproofing be done from the inside
In some cases, but external waterproofing is usually more effective because it stops water before it enters the structure. Each situation is assessed individually.
How long does structural waterproofing last
When correctly designed and installed, structural waterproofing systems can last decades with minimal maintenance.
Do you handle both residential and commercial projects
Yes. We work on homes, commercial buildings, and industrial structures across Johannesburg.
Is structural waterproofing disruptive
Below ground waterproofing can involve excavation, but we plan work carefully to minimise disruption and ensure safe, efficient execution.
Speak to a Structural Waterproofing Specialist
If you are dealing with persistent damp, water ingress, or planning a new build that requires proper below ground protection, speak to a team that specialises in structural waterproofing.
Contact us to discuss your project or request a detailed quote. We will help you protect your structure properly, from the ground up.
Service Areas
We provide professional flat roof waterproofing across Johannesburg, including:
Sandton, Midrand, Bryanston, Fourways, Bedfordview, Rosebank, Melrose, Hyde Park, Randburg, and surrounding suburbs.