Exception:
Existing enclosed ceiling, wall or floor cavities
comply provided that these cavities are filled
with insulation.
N1101.3 Identification. Materials, systems and
equipment shall be identified in a manner that will
allow a determination of compliance with the
applicable provisions of this chapter.
N1101.4 Building thermal envelope insulation. An
R-value identification mark shall be applied by the
manufacturer to each piece of building thermal
envelope insulation 12 inches (305 mm) or greater in
width. Alternately, the insulation installers shall
provide a certification listing the type, manufacturer
and R-value of insulation installed in each element of
the building thermal envelope. For blown or sprayed
insulation (fiberglass and cellulose), the initial
installed thickness, settled thickness, settled R-value,
installed density, coverage area and number of bags
installed shall be listed on the certification. For
sprayed polyurethane foam (SPF) insulation, the
installed thickness of the areas covered and R-value
of installed thickness shall be listed on the
certification. The insulation installer shall sign, date
and post the certification in a conspicuous location on
the job site.
N1101.4.1 Blown or sprayed roof/ceiling
insulation. The thickness of blown-in or sprayed
roof/ceiling insulation (fiberglass or cellulose) shall
be written in inches (mm) on markers that are
installed at least one for every 300 square feet (28
m2) throughout the attic space. The markers shall be
affixed to the trusses or joists and marked with the
minimum initial installed thickness with numbers a
minimum of 1 inch (25 mm) in height. Each
polyurethane foam thickness and installed R-value
shall be listed on certification provided by the
insulation installer.
N1101.4.2 Insulation mark installation. Insulating
materials shall be installed such that the
manufacturer’s R-value mark is readily observable
upon inspection.
N1101.5 Fenestration product rating. U-factors of
fenestration products (windows, doors and skylights)
shall be determined in accordance with NFRC 100 by
an accredited, independent laboratory, and labeled
and certified by the manufacturer. Products lacking
such a labeled U-factor shall be assigned a default U-
factor from Tables N1101.5(1) or N1101.5(2). The
solar heat gain coefficient (SHGC) of glazed
fenestration products (windows, glazed doors and
skylights) shall be determined in accordance with
NFRC 200 by an accredited, independent laboratory,
and labeled and certified by the manufacturer.
Products lacking such a labeled SHGC shall be
assigned a default SHGC from Table N1101.5(3).
N1101.6 Insulation product rating. The thermal
resistance (R-value) of insulation shall be determined
in accordance with the U.S. Federal Trade
Commission R-value rule (CFR Title 16, Part 460,
May 31, 2005) in units of h x ft2 x °F/Btu at a mean
temperature of 75°F (24°C).
N1101.7 Installation. All materials, systems and
equipment shall be installed in accordance with the
manufacturer’s installation instructions and this code.
N1101.7.1 Protection of exposed
foundation insulation. Insulation applied to
the exterior of basement walls, crawlspace
walls and the perimeter of slab-on-grade
floors shall have a rigid, opaque and
weather-resistant protective covering to
prevent the degradation of the insulation’s
thermal performance. The protective
covering shall cover the exposed exterior
insulation and extend a minimum of 6
inches (153 mm) below grade.
N1101.8 Above code programs.
Deleted
N1101.9 Certificate. A permanent certificate shall be
posted on or in the electrical distribution panel, in the
attic next to the attic insulation card, or inside a
kitchen cabinet or other approved location. The
certificate shall not cover or obstruct the visibility of
the circuit directory label, service disconnect label or
other required labels. The builder, permit holder, or
registered design professional shall be responsible for
completing the certificate. The certificate shall list
the predominant R-values of insulation installed in or
on ceiling/roof, walls, foundation (slab, basement
wall, crawlspace wall and/or floor) and ducts outside
conditioned spaces; U-factors for fenestration and the
solar heat gain coefficient (SHGC) of fenestration.
Where there is more than one value for each
component, the certificate shall list the value
covering the largest area. The certificate shall
indicate whether the building air leakage was visually
inspected as required in N1102.4.2.1 or provide
results of the air leakage testing required in
N1102.4.2.2 The certificate shall provide results of
duct leakage test required in N1102.4.2.2. Appendix
E-1 contains a sample certificate.