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Formulated Materials

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Step 8: Common Failure Points and Field Fixes

Step 8 documents five common balcony waterproofing failures with root causes and approved field fixes. The guide covers membrane bubbles, lap edge fishmouths, transition leaks, drain leaks, and scupper edge leaks with detailed repair procedures.

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Summary

Step 8 documents five common balcony waterproofing failures with root causes and approved field fixes. The guide covers membrane bubbles, lap edge fishmouths, transition leaks, drain leaks, and scupper edge leaks with detailed repair procedures.

Tags

waterproofing · balcony · membrane · failure-analysis · field-repairs · construction

Key entities

membrane bubble or blister (concept, 0.95) · lap edge fishmouth (concept, 0.95) · transition leak at inside corner (concept, 0.92) · drain leak (concept, 0.93) · scupper edge leak (concept, 0.93) · SP1 primer (technology, 0.88) · cove bead (concept, 0.85)

Classification

reference · language en · status final

Provenance

claude-haiku-4-5 via @stacklist/be@0.1.0, confidence 0.85, 23 Sep 2026