Exterior or patio door: sill, drainage and waterproofing
The sill is a critical junction between opening, floor, membrane, deck or landing; a low or poorly drained detail can direct water into the wall.
Triage only — not a design.
VERT / GREEN · JAUNE / YELLOW · ROUGE / RED
No signal selected.
What the professional checks
The professional checks substrate, slope, sill, flashing/membrane, drainage, exterior elevation, air seal, insulation and applicable accessibility.
Official sources
Checked: 2026-08-24
Related path
Continue with the right tools
These links connect this page to the next useful checks and decisions without repeating the full content.
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Tools related to this issue
Special check related to this project
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V15
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V16
Advanced diagnostics to cross-check
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V17
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V18
Specialized diagnostics to verify
V18 connects systems that become costly or regulated when a primary project triggers them.
V19
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V19 covers interfaces that become important when multiple home systems interact.
V26
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V27
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V28
Finish and service details to verify
V28 connects small details that become costly once finishes are closed.
V29
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V30
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V32
Post-disaster and legacy systems
V32 connects contamination, storm damage, legacy materials and recommissioning before rebuilding.
V47
V47 interfaces not to miss
These details are small on a drawing but can control water, structure or durability.