Instructions / Assembly

ADDING INSULATION TO EXTERIOR SIDEWALLS

• Seal and caulk any holes or openings.

• Make sure insulation ﬁts snugly against the top, bottom and all sides of the framing.

• When installing insulation with a vapor retarder (such as kraft facing), be sure the faced

side is positioned toward the home’s interior.

• When installing kraft faced batts, start at the top and gently work your way down,

stapling the paper's tab or ﬂange either on the inside face of the wall studs or on the

face of the stud that is toward the interior. Check current codes for approved fastening.

Fit tightly against the bottom framing. Unfaced batts are installed by friction ﬁt.

• Do not compress the insulation.

• If using unfaced insulation, a separate vapor retarder may be required.

• Kraft faced batts are ﬂammable and should not be left exposed. Once insulation is in

place, cover with drywall or another approved ﬁnish material.

• For garage walls, place insulation between studs and point the vapor retarder toward

the garage interior. Again, because the facing may be ﬂammable, it should not be

leftexposed without a code approved ignition barrier. All kraft and other ﬂammable

facings must be covered with a code compliant ignition or ﬁre barrier. Drywall is a

commonly used ﬁre retardant covering.

CAVITIES WITH NARROW FRAMES

• When insulating framed spaces with non-standard widths, cut the faced batt one inch

wider than the space to be ﬁlled. After stapling the insulation’s ﬂange, pull the facing on

the cut side to the other stud, stapling it to the stud through its vapor retarder.

• Make sure insulation is an appropriate distance from heat-generating, fossil-fuel

appliances. Consult the National Fire Protection Association (NFPA) or the appliance

manufacturers’ recommendations for speciﬁcs.

• When insulating between wood framing and masonry chimneys, use only unfaced

insulation.

INTERIOR WALLS

• Seal and caulk any holes or openings.

• Split insulation to ﬁt snugly around wiring, ductwork and plumbing. Be sure the cavity is

ﬁlled completely.

• Once insulation is in place, cover it with drywall or another approved ﬁnish material.

WALL CAVITY DEPTH

• Use the proper thickness of insulation for your wall cavity’s depth. Typically, 2"x4"

assemblies have a depth of 3½", and 2"x6" assemblies have a depth of 5½".

INSTALLING INSULATION IN WALLS