Quality Insulation Inspection

The California Energy Commission (CEC) has set a standard insulation installation in a home. This standard, called Quality Insulation Installation (QII), requires that insulated framing areas resist thermal bridging of the assembly separating a conditioned space from an unconditioned space. For more general information on QII, please follow this link.

Low-rise CMFNH projects that follow QII installation procedures and employ a HERS rater to verify the installation are eligible for a $45 per-unit incentive kicker.

Why QII?

The Insulation Institute conducted a survey of more than 100 of the nation’s top production builders to identify the 5 most common insulation install flaws. The study also asked builders to identify their biggest challenges in working with insulation contractors. Most responses pointed toward use of incorrect materials and improper installation. The top five areas in which insulation flaws can compromise a building’s energy performance are:

  1. Improper sealing around windows, doors, and rough openings
  2. No sealing of plate penetrations and chases
  3. Improperly installed air barriers around double walls, tubs, and showers
  4. Drywall not sealed to top plates
  5. Misalignment of insulation

High Quality Insulation Installation avoids these typical insulation flaws, and ensures the home is efficiently sealed and insulated. QII also calls for better coordination between trades and is not completely the responsibility of the installer. It requires precise coordination between the installer, rater, and the general contractor/builder.    

Click here for more information in QII from Energy Code Ace

QII and Title 24

Per the California Statewide Utility Codes and Standards Program, the 2013 and 2016 codes award compliance credits for installations that perform QII. The Standard Design assumes that builders are not performing QII, and automatically derates the insulation values at 70 percent of the R-value of the installed insulation. If a builder opts for QII, the modeling software will assign credit for actual insulation values (100 percent), and this triggers the requirement for HERS verification. The HERS requirement will be clearly indicated on the CF1R-PRF-01-E form, and builders must submit the appropriate CF2R and CF3R forms to the HERS registry. Builders will need to enlist a HERS rater to verify proper insulation installation within the entire thermal envelope (including walls, roofs, and floors).

QII is included in the 2019 Title 24 code as a prescriptive requirement for all climate zones, except low-rise multifamily buildings in Climate Zone 7. QII will remain a compliance credit for low-rise multifamily buildings in Climate Zone 7. This prescriptive measure does not apply to alterations.

If you have any questions about QII, please email info@cmfnh.com.