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🔗 Sequenceconstruction

Roofing Installation Sequence

Updated Mar 26, 2026
Commercial roof installation: 1) Structural deck inspection, 2) Vapor retarder, 3) Roof insulation (tapered system for drainage), 4) Cover board, 5) Membrane installation (TPO/PVC/EPDM/BUR), 6) Flashing at penetrations and edges, 7) Water test, 8) Final inspection.
TAGS
roofingsequencemembraneinsulationflashing
DETAILS
phase
BUILD
category
Envelope — Roofing
successor
HVAC equipment setting
predecessor
Structural deck complete + MEP penetrations marked
critical holds
["Deck inspection","Water test"]
weather dependency
No rain during membrane install
RELATED KNOWLEDGE
🔗 Sequence
Foundation → Framing Sequence (Hold Point: Foundation Inspection)
Framing cannot begin until foundation inspection passes. Concrete must achieve minimum 75% design strength before loading. Foundation inspection is a hard hold point in every jurisdiction.
🔗 Sequence
Rough MEP → Insulation Sequence (Hold Point: Rough-In Inspection)
Insulation and drywall cannot begin until rough mechanical, electrical, and plumbing inspections pass. All three trades must complete rough-in and be inspected before walls can be closed.
📋 Code
IBC Section 1107 — Accessible Unit and Dwelling Unit Elements
Requires accessible common use elements within individual residential units.
📋 Code
IECC Section 603 — Energy Cost Budget Method
Provides performance-based alternative to prescriptive energy code requirements.
🔗 Sequence
Drywall → Paint/Finishes Sequence
After drywall hung and taped: prime, texture, paint. Flooring after paint (or protect if before). Cabinets after drywall, before countertops. Trim/millwork after paint. Final clean before CO inspection.
📋 Code
NFPA 99 — Health Care Facilities Code
Comprehensive code for safety systems in hospitals and medical facilities.
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