Garage slab to house: slope, threshold, water and salts

The slab-door-wall junction must keep meltwater, wash water and salts away from framing and living space without an improvised threshold.

Triage only — not a design.

VERT / GREEN · JAUNE / YELLOW · ROUGE / RED

Water ponds against the wall or door to the home Wood/drywall at wall base is stained, swollen or friable New slab coating changes threshold elevations Slope and threshold details checked before finishes

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What the professional checks

The professional checks slope, drainage, threshold elevation, material condition, salts/chlorides, wall separation and local garage requirements.

Official sources

CNRC — Code national du bâtiment 2025

Checked: 2026-08-24

Related path

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