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Section 4: Railing Embed Waterproofing
Railing embed waterproofing failures typically result from treating post penetrations as structural rather than waterproofing scope items, causing caulk failure within 5-7 years. The TTP-6 pocket method prevents this by wrapping the membrane into a formed concrete pocket before the railing post is set, requiring proper coordination between structural and waterproofing contractors.
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Summary
Railing embed waterproofing failures typically result from treating post penetrations as structural rather than waterproofing scope items, causing caulk failure within 5-7 years. The TTP-6 pocket method prevents this by wrapping the membrane into a formed concrete pocket before the railing post is set, requiring proper coordination between structural and waterproofing contractors.
Tags
waterproofing · railing-penetration · balcony-construction · membrane-installation · scope-coordination · ttp-6-detail · construction-specification
Key entities
TTP-6 Pocket Method (technology, 0.95) · S60 membrane (technology, 0.9) · scope coordination failure (concept, 0.85) · balcony waterproofing (concept, 0.9) · railing post penetration (concept, 0.88) · flood test (concept, 0.8)
Classification
reference · language en · status final
Provenance
claude-haiku-4-5 via @stacklist/be@0.1.0, confidence 0.85, 23 Sep 2026