Epoxy lining of sewer stacks without demolition

Epoxy lining of vertical sewer stacks without demolition

Vertical sewer stacks are one of the most critical elements in buildings, especially in older properties. Over time, issues such as leaking joints, inter-floor infiltration, and persistent odors become common, often without a clearly visible source.

Internal epoxy lining allows intervention from inside the pipe, without opening walls or replacing the entire system, providing a controlled and efficient solution.

Common problems in vertical stacks

During CCTV inspections, we frequently identify:

• open or degraded joints
• leaks between floors
• localized cracks
• defective connections between branches and the main stack
• deposits caused by internal irregularities

Even without visible breakage, these issues lead to loss of watertightness over time, causing dampness, odors, and structural damage.

How the lining process works

The process involves applying epoxy resin inside the vertical pipe, forming a continuous internal layer that:

• seals leaking joints
• covers micro-cracks
• stops infiltration
• improves internal flow conditions

Proper preparation is carried out beforehand, including cleaning and removal of obstacles to ensure optimal adhesion.

Advantages of a no-demolition solution

This method is particularly suitable for vertical stacks because it allows:

• avoiding demolition across multiple floors
• significantly reducing intervention time
• minimizing disruption to residents
• maintaining system usability during works

In many cases, problems affecting several apartments can be resolved without invasive works in each unit.

When this solution is suitable

Epoxy lining is recommended when:

• the pipe structure is generally stable
• issues are related to joints, connections, or internal wear
• infiltration exists without major structural damage

If the stack presents deformation, collapse, or structural failure, a structural rehabilitation method (CIPP) may be required.

Importance of CCTV inspection

Each system is different, which is why a CCTV inspection is essential to:

• locate exact leak points
• assess overall pipe condition
• determine the appropriate solution

This ensures that the intervention addresses the root cause of the problem.

Effective solution for buildings and condominiums

Vertical stack lining is increasingly used in occupied buildings, providing a technical and controlled way to resolve leaks without major disruption.

If your building shows signs of leakage or infiltration, we can assess the situation and recommend the most suitable approach.