Attic Baffle

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Attic Baffle

What is Attic Baffle?

Attic Baffle, A vent chute installed between rafters to maintain insulation clearance and airflow from soffit to attic.

Description

An attic baffle, also known as an insulation baffle or vent chute, is a molded cardboard or foam panel stapled to the roof sheathing between trusses. It keeps loose insulation from blocking soffit vents, maintaining a clear 1‑ to 2-inch air channel for proper attic ventilation. Baffles enhance energy performance by ensuring proper ventilation and preventing moisture accumulation at the eaves.

FAQs

  • What materials are attic baffles made from?

    Corrugated cardboard, polystyrene, or high-density foam.

  • How far apart are the baffles installed?

    In every rafter bay with soffit vents.

  • Do baffles increase attic ventilation?

    They ensure designed airflow by preventing blockage.

  • Who installs attic baffles?

    Insulation contractors during blow-in or batt placement.

  • Can baffles be retrofitted?

    Yes, slid into place before adding new insulation.

  • What is the required clearance?

    Minimum 1 in ventilation channel from soffit to ridge.

  • Are baffles fire-rated?

    Foam versions meet ASTM E84 Class A for flame spread.

Fun Fact

Fun Fact: Early builders used split PVC pipe halves as DIY baffles before commercial panels became standard.

CSI Code

07 21 00

NAHB Code

720