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Waterproofing / Site problem guide

Swimming pool leak beneath tile

Pool level falls and adjacent rooms or ground remain wet.

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?

Pool level falls and adjacent rooms or ground remain wet.

02 / Inspect and test

Evidence to collect

Rule out evaporation and plumbing leakage; inspect fittings, movement joints and shell cracks.

03 / Likely mechanism

Why it can fail

Tile and grout alone do not form a reliable pressure-resistant waterproof layer.

04 / Technical response

Choose the system

Repair shell defects, waterproof the shell and detail fittings before compatible tile installation.

05 / Site execution

Control the application

Protect membrane during screed and tile work and retain movement joints.

06 / Acceptance

Verify the result

Water test the shell before finishes and retest after completion as specified.

Avoid this shortcut

Do not confuse cosmetic regrouting with a shell waterproofing repair.

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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