A soffit is an exterior or interior architectural feature, generally the horizontal, aloft underside of any construction element. Its archetypal form, sometimes incorporating or implying the projection of beams, is the underside of eaves (to connect a retaining wall to projecting edge(s) of the roof).

What is the purpose of soffits in a house?

Soffits help keep damaging moisture and insect activity out of this crucial area, helping to prevent wood rot, mold, and other problems that can lead to failure of your roof over time. Finally, soffits also help provide crucial ventilation to your attic and the area just below your roof deck.

Does a house have to have soffits?

Your home can have an eave without being enclosed by a soffit, but it can’t have a soffit without an eave. Older homes and some new construction homes with insulated roofs have exposed — or open-rafter — eaves where the rafters of the eaves are visible. In that case, soffits are not necessary.