Unvented Roof Soffit

In an un vented roof foam can serve as the air barrier and vapor retarder and prevent moisture from getting in to the roof cavities.

Unvented roof soffit.

When the house has no soffits and hence no soffit vents. An unvented roof is often the only viable option when roof framing is complicated such as when there are hips valleys dormers or skylights that would prevent eave to ridge ventilation. Or when adding eave vents would clash with the house s architectural style. Ventilation becomes more difficult the more complicated a roof s construction is.

The insulation can go below the roof deck above the roof deck or both. Unvented roof assemblies such as conditioned attics and unvented cathedral ceilings are becoming common in north american construction. Like a wall that is severely out of plumb an unvented roof has insulation packed into the framing cavities aligned with the sheathing. Smartside 23 938 in x 191 875 in 38 series primed wood vented soffit.

A properly functioning un vented roof. Item 88997 model xsss25824. Unvented roofs also. This document provides a brief description of different types of unvented roof assemblies and the benefits of unvented roof construction.

Unvented roofs have a number of advantages. Foam and the roof assembly foam insulation can play an important role in both vented and un vented roof assemblies.