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Waterproofing / Site problem guide

Active basement crack leakage

Water seeps through a wall crack under groundwater pressure.

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?

Water seeps through a wall crack under groundwater pressure.

02 / Inspect and test

Evidence to collect

Map crack width and movement; assess structural significance, water flow and external access.

03 / Likely mechanism

Why it can fail

A crack may carry water but also signal settlement, restraint or structural distress.

04 / Technical response

Choose the system

Have structural cracks assessed; use an engineered injection or external repair after identifying the mechanism.

05 / Site execution

Control the application

Control active water and follow resin or grout mixing, port spacing and injection limits from the approved method.

06 / Acceptance

Verify the result

Monitor under wet conditions and document treated length and any residual leakage.

Avoid this shortcut

Do not inject a moving structural crack with a rigid resin without engineering review.

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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