Rigid Insulation At Unvented Roof

Figure 3 shows the potential for condensation of an unvented roof assembly in houston tx.

Rigid insulation at unvented roof.

Rigid insulation used to control condensing surface temperatures rigid insulation installed above roof deck. If you don t want to use sips or nailbase read this article tolearn the four basic approaches to insulating unvented roof assemblies. Unvented roof assemblies should be insulated either with air impermeable insulation rigid foam or spray polyurethane foam or with a combination of foam and air permeable insulation. 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.

Foam free don t stay stuck in the sci finightmare of foam foam foam. Ratio of r value between rigid insulation and batt insulation is climate dependent. We agree that avoiding sheathing rot is critical and that air permeable insulation such as fiberglass or cellulose cannot be used alone. This section outlines the conditions for unvented attic roof assemblies.

We re big fans of fine homebuilding. Houston tx is located in a hot humid climate region. 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.