HOW TO MEET TITLE 24 PERFORMANCE OPTION

ATTIC REQUIREMENTS WITH CERTAINTEED

Option C/Performance attics require A minimum R-value of ceiling insulation located between the attic and the conditioned space when meeting Section 150.1(c)9B.  The R-value of insulation varies from R30 to R38 depending on the climate zone.

Unvented sealed attic solutions have been recently introduced as one option to fulfill the High Performance Attics criteria of the new 2016 California Title 24 Energy code by using fiberglass in contact with the roof deck with no air gap. The insulation can either be a boxed netting solution with insulation blown in a stapled fabric to give the shape of a box, or unfaced batts held by metallic wires. Without a vapor retarder and no ventilation, these solutions can potentially lead to moisture accumulation at the roof deck in colder climate zones.  In all cases, the airtightness must be ensured by airsealing the roof deck which can tend to be a safety concern with high pitches.  Also, this requires the installation of a sealed “diffusion port” at the ridge by the roofing contractor.

 

 

 

To ensure better energy efficiency, moisture management and durability, CertainTeed offers a solution utilizing a system of rails, clips and tape to install a high performance attic system with SMARTBATT Fiber glass batts, while still utilizing the same truss design and ventilation strategy.

 

Why Choose SmartBatt for Performance Option/C?

  • Easier/Safer and more Flexible to install
    • Airsealing is at the face of the insulation vs. roof deck
    • Flexibility to seal where accessible (no need to seal in high pitches)
  • No Thermal Bridging
    • Smartbatt meets 6 sided contact requirements and face stapling reduces compression.  Also thermal breaks are avoided by installing SmartBatt as a continuous layer below the rafters.
  • Lower Volume of Conditioned Space
    • Due to the dropped ceiling effect of this installation method, attic temperatures in which ductwork must be run, is greatly reduced.  This helps to reduce/avoid ductwork condensation.
                                                    Non HP Attic                                                                             Smartbatt Performance Option/C
    •  vs      
  • Exceptional Moisture Management (see video below)
    • SmartBatt’s Innovative Smart Vapor Retarder Technology helps reduce the risk of moisture build up and mold growth. 
    • Passes Moisture Management requirements for every zone in California.
  • Roof Deck Remains Ventilated at the Ridge

Exceptional Moisture Management 

SmartBatt’s Innovative Smart Vapor Retarder Technology helps reduce the risk of moisture build up and mold growth. Passes Moisture Management requirements for every zone in California.