Washington Administrative Code › Title 51 - Enterprise Services, Department of (Building Code Council) › Chapter 51-11R - State Building Code adoption and amendment of the 2021 edition of the International Energy Conservation Code, Residential › Section 51-11R-30310 - Section R3031-Identification

Current through Register Vol. 24-14, July 15, 2024
R303.1 Identification.
Materials, systems and
				equipment shall be identified in a manner that will allow a determination of
				compliance with the applicable provisions of this code.
R303.1.1 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. For insulated siding, the
R
-value shall be labeled on the product's package and shall be
				listed on the certification. The insulation installer shall sign, date and post
				the certification in a conspicuous location on the job site.
EXCEPTION:
For roof insulation installed above the deck, the
R
-value shall be labeled as required by the material standards
						  specified in Table 1508.5 of the
International Building Code
or Table R906.2 of the
International Residential Code
.
R303.1.1.1 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 marker shall
				face the attic access opening. Spray polyurethane foam thickness and installed
R
-value shall be
listed
on certification
				provided by the insulation installer.
R303.1.2 Insulation mark installation.
Insulating
				materials shall be installed such that the manufacturer's
R
-value mark is readily observable upon inspection. For
				insulation materials that are installed without an observable manufacturer's
R
-value mark, such as blown or draped products, an insulation
				certificate complying with Section R303.1.1 shall be left immediately after
				installation by the installer, in a conspicuous location within the building,
				to certify the installed R-value of the insulation material.
R303.1.3 Fenestration product rating.
U
-factors of fenestration products (windows, doors and
				skylights) shall be determined in accordance with NFRC 100.
EXCEPTION:
Where required, garage door
U
-factors
						  shall be determined in accordance with either NFRC 100 or ANSI/DASMA
						  105.
U
-factors shall be determined 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 Table R303.1.3(1),
				R303.1.3(2) or R303.1.3(4). The solar heat gain coefficient (SHGC) and visible
				transmittance (VT) 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 or VT shall be assigned a default SHGC or VT from
				Table R303.1.3(3).
EXCEPTIONS:
1. Units without NFRC ratings produced by a
small business
may be assigned default
U
-factors from Table R303.1.3(5) for vertical
						  fenestration.
2. Owner-built, nonoperable wood frame window
						  consisting of a double pane unit with low-
e
(E = 0.04 or
						  less), 1/2-inch air space with argon fill.
R303.1.4 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
				(C.F.R. Title 16, Part 460) in units of h ×
				ft2
								×
								°F/Btu at a mean temperature of
				75°F (24°C).
R303.1.4.1 Insulated siding.
The thermal
				resistance (
R
-value) of insulated siding shall be determined
				in accordance with ASTM C1363. Installation for testing shall be in accordance
				with the manufacturer's installation instructions.
R303.1.5 Air-impermeable insulation.
Insulation
				having an air permeability not greater than 0.004 cubic feet per minute per
				square foot (0.002 L/(s x m2)) under pressure
				differential of 0.3-inch water gauge (75 Pa) when tested in accordance with
				ASTM E2178 shall be determined air-impermeable insulation.
Statutory Authority:
				  RCW
				    19.27A.020,
				  19.27A.045 and
				  chapters
				  19.27 and
				  34.05 RCW. 13-04-055, §
				  51-11R-30310, filed 2/1/13, effective
				  7/1/13.