Washington Administrative Code
2023 Archive

Chapter 51-11R WAC
Last Update: 9/25/23

STATE BUILDING CODE ADOPTION AND AMENDMENT OF THE 2018 EDITION OF THE INTERNATIONAL ENERGY CONSERVATION CODE, RESIDENTIAL
PDF of Chapter Digest
WAC Sections
51-11R-10000Chapter 1 RE—Scope and administration.
51-11R-10100Section R101—Scope and general requirements.
51-11R-10200Section R102—Alternative materials, design and methods of construction and equipment.
51-11R-10300Section R103—Construction documents.
51-11R-10400Section R104—Fees.
51-11R-10500Section R105—Inspections.
51-11R-10600Section R106—Notice of approval.
51-11R-10700Section R107—Validity.
51-11R-10800Section R108—Referenced standards.
51-11R-10900Section R109—Stop work order.
51-11R-11000Section R110—Means of appeal.
51-11R-11100Section R111—Violations.
51-11R-11200Section R112—Liability.
51-11R-20000Chapter 2 RE—Definitions.
51-11R-20100Section R201—General.
51-11R-20200Section R202—General definitions.
51-11R-20201Section R202.1—A.
51-11R-20202Section R202.2—B.
51-11R-20203Section R202.3—C.
51-11R-20204Section R202.4—D.
51-11R-20205Section R202.5—E.
51-11R-20206Section R202.6—F.
51-11R-20207Section R202.7—G.
51-11R-20208Section R202.8—H.
51-11R-20209Section R202.9—I.
51-11R-20210Section R202.10—J.
51-11R-20211Section 202.11—K.
51-11R-20212Section R202.12—L.
51-11R-20213Section R202.13—M.
51-11R-20214Section R202.14—N.
51-11R-20215Section R202.15—O.
51-11R-20216Section R202.16—P.
51-11R-20217Section R202.17—Q.
51-11R-20218Section R202.18—R.
51-11R-20219Section R202.19—S.
51-11R-20220Section R202.20—T.
51-11R-20221Section R202.21—U.
51-11R-20222Section R202.22—V.
51-11R-20223Section R202.23—W.
51-11R-20224Section R202.24—XYZ.
51-11R-30000Chapter 3 RE—General requirements.
51-11R-30100Section R301—Climate zones.
51-11R-30200Section R302—Design conditions.
51-11R-30300Section R303—Materials, systems and equipment.
51-11R-30310Section R303.1—Identification.
51-11R-30311Table R303.1.3(1)—Default glazed fenestration U-factor.
51-11R-30312Table R303.1.3(2)—Default opaque door U-factors.
51-11R-30313Table R303.1.3(3)—Default glazed fenestration SHGC and VT.
51-11R-30314Table R303.1.3(4)—Default U-factors for skylights.
51-11R-30315Table R303.1.3(5)—Small business compliance default table.
51-11R-30320Section R303.2—Installation.
51-11R-30330Section R303.3—Maintenance information.
51-11R-40000Chapter 4 RE—Residential energy efficiency.
51-11R-40100Section R401—General.
51-11R-40200Section R402—Building thermal envelope.
51-11R-40210Section R402.1—General.
51-11R-40211Table R402.1.2—Insulation and fenestration requirements by component.
51-11R-40213Table R402.1.3—Insulation minimum R-values and fenestration requirements by components.
51-11R-40215Target/Proposed UA equations.
51-11R-40220Section R402.2—Specific insulation requirements.
51-11R-40230Section R402.3—Fenestration.
51-11R-40240Section R402.4—Air leakage.
51-11R-40241Table R402.4.1.1—Air barrier and insulation installation.
51-11R-40250Section R402.5—Maximum fenestration U-factor and SHGC.
51-11R-40300Section R403—Systems.
51-11R-40310Section R403.1—Controls.
51-11R-40315Section R403.2—Hot water boiler.
51-11R-40320Section R403.3—Ducts.
51-11R-40330Section R403.4—Mechanical system piping insulation.
51-11R-40340Section R403.5—Service hot water systems.
51-11R-40350Section R403.6—Mechanical ventilation.
51-11R-40351Table R403.6.1—Mechanical ventilation system fan efficacy.
51-11R-40360Section R403.7—Equipment sizing.
51-11R-40370Section R403.8—Systems serving multiple dwelling units.
51-11R-40380Section R403.9—Snow melt system controls.
51-11R-40390Section R403.10—Pool and spa energy consumption.
51-11R-40391Section R403.10—Other pools and spas.
51-11R-40392Section R403.13—Heat pump space heating.
51-11R-40400Section R404—Electrical power and lighting systems.
51-11R-40410Section R404.1—Lighting equipment.
51-11R-40500Section R405—Total building performance.
51-11R-40510Section R405.1—Scope.
51-11R-40520Section R405.2—Performance based compliance.
51-11R-40530Section R405.3—Documentation.
51-11R-40540Section R405.4—Calculation procedure.
51-11R-40550Section R405.5—Calculation procedure.
51-11R-40551Table R405.4.2(1)—Specifications for the standard reference and proposed designs.
51-11R-40552Table R405.4.2(2)—Default distribution system efficiencies for proposed designs.
51-11R-40560Section R405.5—Calculation software tools.
51-11R-40600Section R406—Additional energy efficiency requirements.
51-11R-40610Section R406.1—Scope.
51-11R-40620Section R406.3—Additional energy efficiency requirements.
51-11R-40621Table R406.3—Energy credits.
51-11R-40700Section R407—Certified passive house.
51-11R-50000Chapter 5—Existing buildings.
51-11R-50100Section R501—General.
51-11R-50200Section R502—Additions.
51-11R-50300Section R503—Alterations.
51-11R-50400Section R504—Repairs.
51-11R-50500Section R505—Change of occupancy or use.
51-11R-51000Chapter 6—Referenced standards.
51-11R-58000Appendix RA—Optional energy efficiency measures—One step.
51-11R-59000Appendix RB—Optional energy efficiency measures—Two step.
51-11R-60000Appendix RC—Exterior design conditions.
51-11R-60100Table RC-1—Outdoor design temperatures for Washington.