675 Ind. Admin. Code 14-4.4-91

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Current through December 4, 2024

Section 675 IAC 14-4.4-91 - Table N1102.1.2; insulation and fenestration requirements by component [a]

Authority: IC 22-13-2-2; IC 22-13-2-2.5; IC 22-13-2-13

Affected: IC 22-12; IC 22-13; IC 22-14; IC 22-15; IC 36-7

Sec. 91.

Delete TABLE N1102.1.2 and substitute to read as follows:

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

CLIMATE ZONE	FENESTRATION U-FACTOR	SKYLIGHT U-FACTOR^b	CEILING R-VALUE	WOOD FRAME RVALUE	MASS WALL R-VALUE^g	FLOOR RVALUE	BASEMENT WALL R-VALUE^c	SLAB RVALUE AND DEPTH^d	CRAWL SPACE RVALUE
4	0.35	0.60	38	15	5/10	19	10/13	10; 2 feet	10/13
5	0.35	0.60	38	20 or 13+5^f	13/17	30^e	10/13	10; 2 feet	10/13

a. R-values are minimums. U-factors are maximums. Batts compressed into a framing cavity such that the R-value is reduced by R-1 or more shall be marked with the compressed batt R-value in addition to the full thickness R-value.

b. The fenestration U-factor column excludes skylights.

c. The first R-value applies to continuous insulation, the second to framing cavity insulation; either insulation meets the requirement.

d. Minimum of R-5 shall be provided under the full slab area of heated slabs in addition to the required slab edge insulation R-value for slab as indicated in the table. The slab edge insulation for heated slabs shall not be required to extend below the slab.

e. R-30 or insulation sufficient to fill the framing cavity, R-19 minimum.

f."13+5" means R-13 cavity insulation with an additional R-5 insulated sheathing applied to the exterior of the wall. If structural sheathing covers 25% or less of the exterior, R-5 sheathing is not required where structural sheathing is used. If structural sheathing covers more than 25% of exterior, structural sheathing shall be supplemented with insulated sheathing of at least R-2.

g. The second R-value applies when more than half the insulation is on the interior.

675 IAC 14-4.4-91

Fire Prevention and Building Safety Commission; 675 IAC 14-4.4-91; filed 11/26/2019, 11:43 a.m.: 20191225-IR-675190330FRA