Unvented Roof Soffit

The insulation can go below the roof deck above the roof deck or both.

Unvented roof soffit.

Unvented roofs also. Smartside 23 938 in x 191 875 in 38 series primed wood vented soffit. Unvented roof assemblies such as conditioned attics and unvented cathedral ceilings are becoming common in north american construction. Item 88997 model xsss25824.

This document provides a brief description of different types of unvented roof assemblies and the benefits of unvented roof construction. Ventilation becomes more difficult the more complicated a roof s construction is. Foam and the roof assembly foam insulation can play an important role in both vented and un vented roof assemblies. Unvented roofs have a number of advantages.

Or when adding eave vents would clash with the house s architectural style. A properly functioning un vented roof. Because the attic space is now inside the thermal envelope blowing a little heat up there is not like throwing twenty dollar bills out the window. Like a wall that is severely out of plumb an unvented roof has insulation packed into the framing cavities aligned with the sheathing.

When the house has no soffits and hence no soffit vents. Windstorms for example can cause vented soffits to collapse creating excessive pressure which may lead to window blowout and roof loss.