ENERGY STAR®, a U.S. Environmental Protection Agency
program, helps us all save money and protect our environment
through energy efficient products and practices. For more
information, visit www.energystar.gov.
Properly Installed Insulation
Improves Comfort While Saving Energy
Insulation is one of the keys to a comfortable, energy-efficient home. But simply
having the right amount of insulation is not enough. If insulation is not properly
installed, a home can have excessive heat gain during the summer and heat loss in
the winter —forcing the heating and cooling systems to work overtime.
Properly installed insulation wili completely blanket the home —exterior walls,
ceiling, and floors —without gaps, voids, or compressions, and it wili be in full
contact with the interior air barrier (for example, drywall). Continuous sealing of the
air barrier along the insulation is also critical to protecting against moisture damage
that can be caused by warm air flow through the insulation to colder surfaces
where it can condense. Expect ENERGY STAR qualified homes to have insulation
that meets or exceeds the latest national code requirements, providing year-round
comfort while reducing utility bills.
• Enhanced Comfort. Properly installed insulation minimizes temperature variability indoors
and helps keep rooms warmer in the winter and cooler in the summer.
• Lower Utility Bills. As much as half of the energy used in your home goes to heating and
cooling. By preventing heat loss in the winter and heat gain in the summer, a properly
installed insulation barrier reduces utility bills year round.
• Improved Durability. When insulation is properly installed, the potential for condensation
that can lead to decay of building materials is reduced, helping to improve the durability of
your home.
Better Resale Position. The improved comfort, lower utility bills, and improved durability of
a properly installed insulation barrier can translate into higher resale value compared to
less efficient homes.

Builders have many choices for the types of insulation they use. All insulation can be effective
if it is properly installed and coupled with a continuous air barrier. Insulation materials are
rated according to their ability to resist heat flow. This thermal resistance rating is commonly
known as an "R-value." The higher the R-value, the better the material is at resisting heat
flow. ENERGY STAR qualified homes can include one or more of the following types of
Batt Insulation is typically made from mineral fiber (fiberglass or rock wool) and manufactured
in blankets of various sizes and thicknesses. Batt insulation is typically fitted between studs,
joists, and beams and should fill the wall, floor, or ceiling cavity without any gaps, voids, or
Blown-in Insulation is typically made from fiberglass or
cellulose and is literally blown into the walls and attic
through a large hose. Blown-in insulation should
completely fill the wall cavities and be an even thickness
throughout the attic.
Sprayed or Injected Foam Products are typically made
from polyurethane or similar products and are injected or
sprayed into cavities where they expand to the desired
Blown-in attic insulation
Rigid Insulation is typically made from polystyrene, polyurethane, or polyisocyanurate foam,
which is expanded or formed into large sheets. Rigid insulation can be used to provide a
continuous thermal barrier in basements, crawlspaces, and on exterior walls.
ENERGY STAR is a voluntary partnership between the government and more than 9,000
organizations, including more than 3,500 of the nation's home builders. Together with home
buyers and their families, we are working to achieve a common goal —protecting the
environment for future generations by changing to more energy-efficient practices and
products today.
ENERGY STAR is the government-backed symbol for energy efficiency. It identifies new
homes, buildings, and more than 50 types of products that are energy efficient and offer the
features, quality, and performance that today's consumers expect. Products that can earn the
ENERGY STAR include windows, heating and cooling equipment, lighting, and appliances. To
learn more about ENERGY STAR, visit www.energystar.gov.