Table N1102.1.2 (R402.1.2) of the International Residential Code for One- and Two-Family Dwellings is hereby amended to read as follows:

TABLE N1102.1.2 (R402.1.2) INSULATION AND FENESTRATION REQUIREMENTS BY COMPONENT^a

Climate Zone	Fenestration U-Factorb	Skylight U-Factorb	Glazed Fenestration SHGCb	Ceiling R-Valueg	Wood Frame Wall R-Value	Mass Wall R-Valuef	Floor R-Valuee	Basement Wall R-Valuec	Slab R-Value & Depthd	Crawl Space Wall R-Valuec
4	0.32	0.55	0.40	49	13	8/13	19	10/13	NR	10/13

For SI: 1 foot – 304.8 mm.

NR = Not Required

a.R-values are minimums. U-factors and SHGC are maximums. When insulation is installed in a cavity which is less than the label or design thickness of the insulation, the installed R-value of the insulation shall not be less that the R-value specified in the table.

b.The fenestration U-factor column excludes skylights. The SHGC column applies to all glazed fenestration.

c.“10/13” means R-10 continuous insulation on the interior or exterior of the home or R-13 cavity insulation at the interior of the basement walls.

d.For heated slabs, R-5 insulation shall be provided under the full slab area and shall be added to the slab edge.

e.Or insulation sufficient to fill the framing cavity, R-19 minimum.

f.The second R-value applies when more than half the insulation is on the interior of the mass wall.

g.Loose-fill-insulation shall be installed at the rate recommended by the manufacturer’s statement “so many bags per 1000 sq ft”. Where the pitch of the roof restricts the “minimum thickness” at the exterior wall line, the insulation shall be blown into the cavity so as to achieve a greater compacted density to a point where the “minimum thickness” can be achieved. An alternative is to install high-density batts around the perimeter edge per N1102.2.