VERT / GREEN
Locate every drain/overflow and keep them visible/accessibile.
Flat roof overflow, scupper and secondary drainage
Check primary drains, overflow scuppers, slopes, parapets, flashing and ponding load if a drain blocks.
JAUNE / YELLOW
An overflow is not decorative: it limits water depth and often signals a primary-drain problem.
ROUGE / RED
No secondary drainage, deep ponding, high parapet or unknown structure: roof/structural assessment.
Interactive triage
Helps choose the next step; does not replace design, permits or professional diagnosis.
Useful tools and data
- Drain/scupper plan
- Overflow elevations
- Structural plan
What the professional checks
- Verify drainage capacity
- Check ponding load
- Detail scupper/flashing
Official sources
Checked 2026-08-22.
Related path
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
Start from a symptomOrganize plausible causes, observations, urgency and the right professional.Open →Track water useCompare meter readings and flag unusual changes.Open →Review water resilienceConnect flooding, drainage and future events to building adaptations.Open →Score home resiliencePrioritize water, outages, fire, climate, health and records.Open →Plan site, drainage and utilitiesCoordinate access, water, sewer, wells, septic, grading and site constraints.Open →
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Edge systems to integrate into the project
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Often-overlooked service interfaces
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This section connects small details that become costly once finishes are closed.
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Post-disaster and legacy systems
This section connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
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V47 interfaces not to miss
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