Blog

Leaks around Pipe Penetration

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Leaks around pipe penetrations occur when sealants fail or cracks form during drilling, allowing water to seep through. If not adequately sealed, these penetrations can lead to moisture problems such as condensation, mould growth, and rot, which, if left unaddressed, can become significantly more costly in the long run. Our SNSeal High-Pressure Injectable Sealant fills these gaps, creating a watertight seal that protects the concrete and extends the structure’s lifespan.

Pipe Penetration with mould growing on it, clear water ingress issues.

What to look out for:

Peeling paint, Mould growth, Rusting Pipes.

Pipe Penetration with water ingress clearly evident, can see peeling paint on roof.

What to look out for:

Peeling paint, Mould growth, Rusting Pipes.

Why this happens:

When a pipe, service riser, electrical conduit, or air duct is installed in a building, it enters and exits through concrete walls or slabs. These penetrations may be sealed with a cement-based water plug or patch from the interior side of the building during initial construction as a temporary measure. Over time, the bond to the concrete usually fails, allowing water to seep around the pipe penetration.

Pipe penetrations are sometimes classified as weak points. If there is rising water due to hydrostatic pressure, the pipe penetrations may become the path of least resistance for water to enter or exit.

Results of inadequately sealed pipe penetration:

Pipe penetrations that are not adequately sealed can lead to moisture problems such as condensation, mold growth, and rot. These issues can be harmful to both the slab and the pipe itself. If leaks around pipe penetrations are left unaddressed, the cost of repairs down the line can be significantly higher.

How to address leaks around pipe pens:

Stay vigilant and routinely check around your pipes for signs of moisture buildup, such as stains or damp patches. It’s especially important to check this after heavy rainfall.

 

Steps we take to address a pipe penetration:

Here’s a simplified version of the steps we take to address leaks around pipe penetrations:

  1. Clean the area: Remove any efflorescence, failed sealant, and debris around the cracks and pipe penetrations to see the full extent of leaks.
  2. Remove pipe collars: Take off the collars to access the pipe-slabs joint for proper sealing.
  3. Apply polyurethane sealant: Coat the pipe penetration with a high-quality polyurethane sealant.
  4. Inject SNSeal liquid rubber: Inject SNSeal liquid rubber and activator into the gap between the pipe and slab to seal the void.
  5. Apply membrane coats: Apply two coats of membrane around each pipe to fully seal the penetration

 

Solution:

Our SNSeal High-pressure Injectable Sealant fills these gaps, creating a watertight seal that protects the concrete and extends the structure’s lifespan.

In some cases it may be necessaery to apply a membrane around the pipe penetrations for added protection.

Pipe Penetration, being injected with SNSeal High-Pressure Injectable Sealant pump, through slab.

Injection of SNSeal High-Pressure Injectable Sealant

Pipe Penetration or pipe risers on rooftop, with membrane around them.

Membrane around pipe penetration

See this Before & After results of High pressure injectable sealant and membrane.

Pipe Penetration with mould growing on it, clear water ingress issues.
Pipe Penetration with mould growing on it, clear water ingress issues.

If you notice a leak around a pipe penetration reach out to us today for a free quotation, or for more info contact our team on 0412 330 033.

Waterproofing is an essential part of maintaining a building’s integrity, but many myths surround its importance and application. Whether you’re a homeowner, builder, or property manager, it’s crucial to understand the facts behind waterproofing to ensure long-term protection. In this blog, we’ll debunk some of the most common waterproofing myths and clarify why proper maintenance and the right materials are key to safeguarding your structure from water damage.

"Waterproofing is Only Needed in Wet or Flood-Prone Areas"...

While waterproofing is essential in flood-prone areas, it’s also crucial in any environment where moisture can cause damage. Water can seep into structures through joints, even in dry climates. Temperature changes, humidity, and even condensation can lead to moisture buildup that damages building materials, causing rust, mould, or deterioration over time.

"Once Waterproofing is Done, It Doesn’t Need Maintenance"...

Waterproofing isn’t a one-time fix. Over time, materials like sealants and membranes degrade due to UV exposure, weathering, or building movement. Regular inspections and maintenance are essential to ensure the waterproofing system remains effective. Without proper upkeep, even a well-installed waterproofing system can fail.

"Waterproofing Will Always Be Expensive"...

While high-quality waterproofing solutions can have an upfront cost, they are an investment in the longevity and integrity of the structure. The cost of repairs resulting from water damage—such as structural repairs, mould remediation, and interior damage—often far exceeds the initial investment in proper waterproofing.

"Waterproofing is Only for New Construction"...

Waterproofing is important in both new and existing buildings. In older structures, joints may have deteriorated, and waterproofing may need to be updated. Even in newly constructed buildings, waterproofing expansion joints is a crucial step to prevent future damage, and it’s essential to maintain it as the building ages.