Pursuant to the UCC, delete Section N1101.4 and replace as follows:
R-N1101.4 Above code programs. The building official or other authority having jurisdiction shall be permitted to deem a national, state or local energy efficiency program to exceed the energy efficiency required by this chapter. Buildings approved in writing by such an energy efficiency program shall be considered in compliance with this chapter.
Pursuant to the UCC, delete Table N1102.1.2 and replace as follows:
CLIMATE ZONE | FENESTRATION U-FACTOR
b | SKYLIGHT b U-FACTOR | GLAZED FENESTRATION SHGC
b, e | CEILING R-VALUE | WOOD FRAME WALL R-VALUE | MASS WALL R-VALUE
i | FLOOR R-VALUE | BASEMENT
c
WALL R-VALUE | SLAB
d
R-VALUE & DEPTH | CRAWL SPACE
c WALL R-VALUE |
CLIMATE ZONE | FENESTRATION U-FACTOR
b | SKYLIGHT b U-FACTOR | GLAZED FENESTRATION SHGC
b, e | CEILING R-VALUE | WOOD FRAME WALL R-VALUE | MASS WALL R-VALUE
i | FLOOR R-VALUE | BASEMENT
c
WALL R-VALUE | SLAB
d
R-VALUE & DEPTH | CRAWL SPACE
c WALL R-VALUE |
1 | NR | 0.75 | 0.25 | 30 | 13 | 3/4 | 13 | 0 | 0 | 0 |
2 | 0.40 | 0.65 | 0.25 | 38 | 13 | 4/6 | 13 | 0 | 0 | 0 |
3 | 0.35 | 0.55 | 0.25 | 38 | 20 or 13+5 h |
8/13 | 19 | 5/13 f |
0 | 5/13 |
4 except Marine | 0.32 | 0.55 | 0.40 | 49 | 20 or 13+5 h |
8/13 | 19 | 10/13 | 10, 2 ft. | 10/13 |
5 and Marine 4 | 0.30 | 0.55 | NR | 49 | 20 or 13+5 h |
13/17 | 30 g |
15/19 | 10, 2 ft. | 15/19 |
6 | 0.30 | 0.55 | NR | 49 | 20+5 h or 13+10 h |
15/20 | 30 g |
15/19 | 10, 4 ft. | 15/19 |
7 and 8 | 0.30 | 0.55 | NR | 49 | 20+5 h
or 13+10 h |
19/21 | 38 g |
15/19 | 10, 4 ft. | 15/19 |
For SI: 1 foot = 304.8 mm.
NR = Not Required.
a. R-values are minimums. U-factors and SHGC are maximums. Where insulation is installed in a cavity that is less than the label or design thickness of the insulation, the installed R-value of the insulation shall be not less than the R-value specified in the table.
b. The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.
Exception: In Climate Zones 1 through 3, skylights shall be permitted to be excluded from glazed fenestration SHGC requirements provided that the SHGC for such skylights does not exceed 0.30.
c. "10/13" means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation on the interior of the basement wall. "15/19" means R-15 continuous insulation on the interior or exterior of the home or R-19 cavity insulation on the interior of the basement wall. Alternatively, compliance with "15/19" shall be R-13 cavity insulation on the interior of the basement wall plus R-5 continuous insulation on the interior or exterior of the home.
d. R-5 insulation shall be provided under the full slab area of a heated slab in addition to the required slab edge insulation R-value for slabs, as indicated in the table. The slab edge insulation for heated slabs shall not be required to extend below the slab.
e. There are no SHGC requirements in the Marine Zone.
f. Basement wall insulation shall not be required in warm-humid locations as defined by Figure N1101.10 and Table N1101.10.
g. Alternatively, insulation sufficient to fill the framing cavity providing not less than an R-value of R-19.
h. The first value is cavity insulation, the second value is continuous insulation. Therefore, as an example, "13+5" means R-13 cavity insulation plus R-5 continuous insulation.
i. Mass walls shall be in accordance with Section N1102.2.5. The second R-value applies where more than half of the insulation is on the interior of the mass wall.
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