Soffit

The underside surface of a building element, most commonly the horizontal board closing the underside of the eaves overhang between the fascia and the wall, often ventilated to allow airflow into the roof void. The term is also used for the underside of slabs, arches and balconies.

Also known as: soffit board

Related terms

Fascia

A board or profile fixed vertically at the roof edge, typically to the ends of the rafters, closing the eaves and usually carrying the rainwater gutter. Fascias are made from timber, cellular PVC, fibre cement or metal.

Roofing & waterproofingConstruction

Eaves

The lower horizontal edge of a roof slope, usually projecting beyond the wall face, where rainwater is discharged into the gutter. Eaves details typically include the fascia, soffit, ventilation openings and underlay support to prevent water being trapped behind the gutter.

Roofing & waterproofingConstruction

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