Rigid Insulation At Unvented Roof

We agree that avoiding sheathing rot is critical and that air permeable insulation such as fiberglass or cellulose cannot be used alone.

Rigid insulation at unvented roof.

Houston tx is located in a hot humid climate region. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. Foam free don t stay stuck in the sci finightmare of foam foam foam. Insulating unvented roof assemblies.

This section outlines the conditions for unvented attic roof assemblies. In the most recent issue of fine homebuilding martin holladay wrote a piece on insulating unvented roof assemblies. Rigid insulation used to control condensing surface temperatures rigid insulation installed above roof deck. Figure 3 shows the potential for condensation of an unvented roof assembly in houston tx.

Ratio of r value between rigid insulation and batt insulation is climate dependent. Senior engineer manager at icynene john broniek makes the case for the unvented attic assembly and why insulating the underside of the roof makes sense. The quest for greater energy efficiency in buildings has led to increasing interest and need for insulation improvements in hvac equipment more airtight construction new materials and assemblies.