While soffit comes in wood and aluminum, they are most commonly made of vinyl for durability. Soffit can be non-vented or vented to allow for maximum roof ventilation. Non-vented or continuous soffit works best when your roof has narrow eaves or if you need to ventilate a large amount of attic space.

Are soffit vents necessary?

A roof may need soffit vents if there is no other ventilation allowing for adequate air movement. However, if the attic space is properly sealed and insulated, there is no need for this type of ventilation. ... Soffit vents are an easy, aesthetically pleasing way to vent the attic space.

Are soffit vents required by code?

What does the code require? If you plan to install insulation on your attic floor, then most building codes require that the attic be vented. ... If a roof has only soffit vents and no ridge vents, most codes require 1 square foot of net free ventilation area for every 150 square feet of attic floor area.