Attic soffit baffles and ventilation

Maintain eave airflow paths without sacrificing air sealing or insulation depth.

VERT / GREEN = documenter/entretenir · JAUNE / YELLOW = vérifier avant travaux · ROUGE / RED = arrêter le DIY et faire valider.

Insulation blocks soffit vents
Restore airflow without sacrificing required insulation at the top plate. Heavy attic frost
First investigate air leakage/moisture and blocked ventilation. Baffles crushed/missing
Repair airflow path and keep insulation from shifting into it. Soffit/outlet vents clear
Recheck after insulation or roofing work.

What the professional checks

Verify air sealing before ventilation
Coordinate airflow paths and eave insulation

Official sources

RNCan — toitures, greniers et déflecteurs

Checked: 2026-08-22

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