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Step 5: Scupper Sequencing and Membrane Integration
Scupper sequencing and membrane integration is a critical balcony waterproofing detail that requires framing the opening first, installing the scupper sleeve before the membrane, and shingling the membrane into the throat to prevent leaks. The correct sequence involves setting the scupper body, priming the flange, lapping membrane over it by minimum 2 inches, and ensuring the cut edge remains inside the throat rather than exposed.
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Summary
Scupper sequencing and membrane integration is a critical balcony waterproofing detail that requires framing the opening first, installing the scupper sleeve before the membrane, and shingling the membrane into the throat to prevent leaks. The correct sequence involves setting the scupper body, priming the flange, lapping membrane over it by minimum 2 inches, and ensuring the cut edge remains inside the throat rather than exposed.
Tags
scupper-sequencing · membrane-integration · balcony-waterproofing · construction-detail · flashing-installation
Key entities
S60 membrane (technology, 0.95) · SP1 primer (technology, 0.95) · scupper throat clearance (concept, 0.9) · membrane shingling (concept, 0.85)
Classification
tutorial · language en · status final
Provenance
claude-haiku-4-5 via @stacklist/be@0.1.0, confidence 0.85, 23 Sep 2026