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Waterproofing / Site problem guide

Water ingress at pipe penetration

Leak is concentrated around a pipe, sleeve or service line.

A practical decision sequence

Diagnose the cause, then verify the repair.

Use the site evidence to agree a project-specific method with the responsible engineer, concrete producer, manufacturer or specialist applicator.

01 / Symptom

What is happening?

Leak is concentrated around a pipe, sleeve or service line.

02 / Inspect and test

Evidence to collect

Check annular gap, pipe movement, sleeve condition, collar and possible plumbing leaks.

03 / Likely mechanism

Why it can fail

Rigid mortar around a moving pipe or an interrupted membrane often opens a water path.

04 / Technical response

Choose the system

Use a compatible sleeve, collar, flexible seal and membrane transition suited to exposure.

05 / Site execution

Control the application

Clean the annulus, establish backing and specified bond surfaces, and inspect the full circumference.

06 / Acceptance

Verify the result

Test the plumbing separately, then test the waterproofed penetration before concealment.

Avoid this shortcut

Do not assume every wet pipe penetration is a membrane failure.

These guides are editorial starting points, not a project specification. Confirm the design, product data, substrate conditions and inspection plan for the actual site.
Technical references

References inform the topic; they do not endorse a specific product for this project.

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