Secant pile leaks are one of the most common and disruptive issues in coastal excavation waterproofing—especially along waterfronts, rivers, and areas with shallow water tables. These leaks in secant pile walls often occur at joints, where groundwater penetrates under pressure, risking excavation collapse and costly delays.
At Stop & Seal, we specialise in sealing secant pile leaks quickly and effectively. A recent project on the Gold Coast Highway in Burleigh Heads involved active water ingress through a leaking secant pile wall, threatening the stability of a deep commercial excavation.
Using our SNSeal high-pressure injection waterproofing system, we successfully sealed the secant pile joints, stopping the leak at its source. This non-invasive waterproofing method is trusted nationwide for solving leaks in secant pile walls in high-risk, water-logged environments.
Why Do Secant Piles Leak in Coastal Excavations?
In coastal regions like Burleigh Heads, it’s not unusual to hit groundwater early in an excavation. With sandy, porous soils and a naturally high water table, coastal construction faces more water pressure than inland sites.
Secant piles are designed to retain soil and limit water flow, but they’re not completely watertight — especially where two piles join. Over time, or even during excavation, water can begin to leak through the joints or gaps, often carrying soil or debris with it.
If left untreated, these leaks can cause:
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Project delays
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Increased construction costs
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Potential collapse or excavation failure
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In our recent project, active leaks were occurring between secant piles, allowing both water and material to leak into the excavation. This required immediate action to seal the leaks and stabilise the site.
Our Waterproofing Solution:
SNSeal High-Pressure Injection
To stop the leaks and protect the excavation, we used our SNSeal high-pressure injection system — a proven method for sealing active water ingress without structural changes or demolition.
The SNSeal Injectable Sealant creates a watertight, flexible barrier that conforms to irregular voids and cracks between the piles. It cures quickly and doesn’t rely on dry conditions to be effective — making it perfect for coastal and live excavation sites.
Why Builders Choose Stop & Seal?
This wasn’t a one-off issue. Leaking secant piles are something we manage across Australia from Queensland to New South Wales to Victoria.
Builders and developers trust us because we offer:
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Fast response times
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Non-invasive repair solutions
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Long-term protection against water ingress
Whether it’s a basement, a retaining wall, or an active dig, our patented and exclusive injection systems provide reliable, site-safe sealing — even in high-pressure, high-water-table environments.
Other Commercial Waterproofing Services We Offer
Secant Pile Leak Sealing
Basement Waterproofing
Excavation Stabilisation
Retaining Wall Waterproofing
Treating cracked or leaking concrete and block retaining walls with non-invasive sealant systems.
Joint and Crack Injection
High-pressure injection of SNSeal into construction joints, cold joints, and cracks where water ingress is occurring.
Waterproofing in High Water Table Zones
Custom waterproofing solutions for sites located near coastlines, rivers, or areas with naturally shallow water tables.
Waterproofing Service Areas:
Australia-Wide, Key Areas include Queensland, Victoria & New South Wales
We provide waterproofing services Australia-wide, with our head office based on the Gold Coast. Our expert waterproofing solutions cover:
Queensland, including key service areas in Brisbane such as but not limited to Brisbane CBD, Fortitude Valley, Spring Hill, and West End, as well as Gold Coast areas like Southport, Surfers Paradise, Burleigh Heads, Coomera, Robina, and Tweed Heads. From injection waterproofing to membrane waterproofing, we offer a range of reliable solutions for both residential and commercial properties.
Victoria, we provide professional waterproofing services in Melbourne and surrounding areas, including but not limited to Melbourne CBD, Southbank, St Kilda, and Docklands. We also service other parts of Victoria, offering membrane waterproofing and other high-quality waterproofing solutions across regions such as Geelong, Werribee, Ballarat, and beyond. Our injection waterproofing methods ensure long-lasting protection for your property.
New South Wales, our NSW Metro franchise is here to help with all your waterproofing needs. From injection waterproofing to membrane waterproofing, we provide expert solutions for a wide range of waterproofing issues.
Contact the NSW Metro team directly at [email protected] or 0418 830 860.
Need Help With Secant Pile Waterproofing or Water Ingress?
Whether you’re working on a deep excavation or managing a high water table, water ingress is a problem you can’t afford to ignore.
Stop & Seal provides fast, effective waterproofing solutions for leaking secant piles and coastal excavation sites — without the need for costly re-excavation.
Contact our team today to speak with a waterproofing expert and get your site secured.