What is a Gable Louver?
A gable louver is a slatted opening in a gable wall that lets air move through the attic.
Definition
Purpose
Gable louvers let an attic release heat and moisture. Keeping the roof space ventilated helps reduce condensation on the decking, where persistent dampness can cause decay and give mold or mildew a place to grow.
Examples of Use
- Residential Attics: On a gable-roofed house, vents can be fitted into the attic's end walls.
- Garages and Outbuildings: Ventilating the enclosed roof space over a garage or shed.
- Repair Work: Replacing a bent louver or damaged screen within an existing opening.
- Exterior Renovations: New louvers can match the siding and trim.
Notes
- Size the vent for the attic floor area using its net free area, the space left for airflow after slats and screens are accounted for.
- A grille with a solid backing is decorative. It cannot count toward the attic's ventilation area.
- Look behind the slats for nests, paint buildup, or insulation blocking the opening. Torn screens need repair.
- Adding gable openings can alter airflow through existing soffit and ridge vents. Review the arrangement before making changes.
- Wind can bring air in at one gable and out at the other. With lower intakes, warm air can also rise out through high louvers by the stack effect. No fan is needed.
- Check whether a flush or recessed model suits the opening, siding, and mounting hardware.
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