ATLANTA INSULATION CONTRACTORS
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Key insulation locations
Attic floors. Attic temperatures are usually far above outside ambient temperature. Because of the extreme
temperature difference, insulating the floor of the attic is especially important. According to the U.S. Department
of Energy, a typical Georgia attic should have an R-38 insulation blanket. Because of ease of access, if your home
does not already have R-38 attic insulation, adding additional attic insulation is probably a good first step.
Floors over crawlspaces and unconditioned basements. Floors over unheated, uninsulated spaces should also be
insulated. The U.S. Department of Energy suggests an R-19 for a typical Georgia home. Installing insulation over
an unconditioned crawlspace typically involves placing it between floor joists and stapling it in place.
Exterior walls. For the typical new Georgia home, the Department recommends R-13 for exterior wall cavities.
Unfortunately, many older homes were built without any insulation in the exterior wall cavities. Insulating an
exterior wall cavity of an existing home is relatively difficult, and usually involves drilling a two- to three-inch
hole into each exterior wall cavity along the entire exterior home wall. Loose fill is then blown into each cavity.
After the insulation is installed, the holes must be patched and painted. In some cases, it is easier to remove a
few pieces of siding on the outside of the house and access the wall cavities from the outside.
Attic ventilation
As discussed in the roofers section, proper attic
ventilation is key to managing the summer attic
temperature. The ridge vent-soffit vent system
is one of the best systems available. As does
a chimney, this system employs the natural rise
of hot air to generate airflow. Cooler air enters
the attic through the soffit vents in the eaves.
This air is heated in the attic, rises, and exits
through the ridge vents at the highest point in
the attic. Because soffit vents can sometimes
become blocked with insulation, high-quality insulation
contractors install styrofoam or cardboard baffles
before insulation is blown into the attic. The
baffles create a protected, insulation-free pathway
along the underside of the roof to allow air entering
the soffit vents to travel through the baffles
and into the attic.
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