Back to glossary

Soffit

Soffit is the material that covers the underside of the roof overhang, usually with vents to allow attic airflow.

Waterproofing and Building Envelope

Why it matters

Soffit vents are critical for attic ventilation. Blocked or missing soffits can lead to moisture problems and ice dams.

Where people get this wrong

Soffit is not the same as fascia. Soffit is usually horizontal and contains vents. Fascia is the vertical edge. Both need maintenance.

Real-world example

An attic has moisture problems even though the ridge vent is clear. Looking outside, the soffit vents are painted shut. The attic cannot breathe.

Where this hits your build

This affects how your home handles water. Water damage is one of the most expensive problems to fix, and it often starts with details that seem small.

Most people do not just struggle with terms. They struggle with the decisions tied to them.

See how HouseChalk helps with the decisions behind terms like this