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Understanding the Soffit

In roofing terms, the soffit is the underside of the eave,

that is, the area between the exterior of the house and the edge of the

roofline. When we talk about installing a soffit, this typically refers to

“boxing” in that underside of the eave to hide the rafters or trusses

from view. The most commonly used materials for box soffits are plywood, cement

board, and vinyl. It is important that the soffit be vented at regular

intervals to allow air to flow in and out of the

attic of a house, especially if that attic is non-livable space.



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