Five-Star Energy Rating Checklist

Barriers

• Five-star energy ratings require that all insulation is installed so that it comes into contact with an interior or exterior air barrier to prevent air flow. The inspector will check installation points throughout the house, including garage transitions and attic eaves. Special guidelines apply to colder climates, where slab edges can have up to 25 percent of the surface without insulation. If insulation is not applied fully to the slab edge, inspectors recommend air barriers be installed at band joists and that the use of thermal bridging be minimized.

Walls

• Adjoining exterior walls or spaces where heating and ventilation does not occur must meet specific requirements to receive five-star energy ratings. These areas must be fully insulated with air barriers on both the exterior and interior of the wall. Homes in the majority of the United States have the option of using a sealed exterior barrier and Grade 1 insulation internally with continuous placement. The areas subject to this regulation include walls behind plumbing and fireplaces as well as insulated attic slopes, knee walls, skylight shafts, staircases and porch roofs that are adjoined to the home.

Floors and Shafts

• Garages and cantilevered flooring creates spaces that are located between exterior spaces and ventilated areas. These areas must have air barriers installed with fibrous insulation edging exposed. This insulation must maintain permanent contact with subflooring and related components, including staves, blankets and netting if installed. Duct shafts, piping shafts and flue shafts will also be inspected during the energy audit to determine if they are fully sealed with blocking of flashing. Gaps should be sealed with caulk or foam.

Ceilings and Common Walls

• The areas where attics and ceilings come together must have a fully installed air barrier in conjunction with sealed gaps and insulation. The insulation can be movable but must be installed so that it fits snugly in the installation area. All insulation must be fully gasketed, and recessed lighting should be sealed to the drywall. The common walls between dwellings must be fully sealed at the exterior areas.