Typical scenario

A drain trial was presented as a whole-shower waterproofing test

If direct discharge into a shower drain is used to declare the whole shower sound, the conclusion may exceed the test. Suppose moisture appears behind a partition after showering, but floor-wall junctions and the enclosure were never wetted.

What needs to be clarified

Review whether conclusions match test coverage, separating drainage, waterproofing and enclosure water paths.

Materials to prepare

  • Report, protocol, photographs and trial sequence
  • Drain, waterproofing and junction details
  • Dated moisture videos identifying shower use

What to compare

Identify water application and the joints actually tested. Check observation duration, initial moisture and monitoring points behind the partition. Compare the proposed water path with details. Plan separate specialist trials for untested zones, preventing further damage and documenting coverage and visibility.

Possible outcome of the analysis

A coverage table and review may assess whether excluded explanations were adequately tested; untested zones receive a targeted examination programme without predetermining the source.

Limits of the conclusions

A dry result from direct drain discharge covers only that path. It cannot confirm concealed waterproofing or exclude enclosure leakage.

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