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2018 Washington State Energy Code—Residential <br /> Prescriptive Energy Code Compliance for All Climate Zones in Washington <br /> Single Family-New&Additions(effective February 1,2021) <br /> ._.................... ---- ---- --- <br /> Table 406.3—Energy Credits(Single Family) <br /> .. ......... ....... <br /> Option j Description Credits:SF '•; <br /> ......... ......... _ ----- <br /> 1. EFFICIENT BUILDING ENVELOPE OPTIONS <br /> Only one option from Items 1.1 through 1.7 may be selected in this category. <br /> Compliance with the conductive UA targets is demonstrated using Section R402.1.4,Total UA alternative,where [1- <br /> (Proposed UA/Target UQ>the required%UA reduction. <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> 1.1 Vertical fenestration U=0.24 D.5 <br /> _... .._.._ <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> 1.2 1.0 <br /> Vertical fenestration U=0.20 <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> Vertical fenestration U=0.28 <br /> Floor R-38 <br /> j 1.3 Slab on grade R-10 perimeter and under entire slab below grade slab R-10 perimeter and 0•' <br /> under entire slab or <br /> i <br /> - ----- <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA by 5% <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: j <br /> Vertical fenestration U=0.25 j <br /> Wall R-21 plus R-4 ci <br /> Floor R-38 <br /> 1.4 ;Basement wall R-21 int plus R-5 ci ! 1.0 <br /> ;Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and <br /> ;under entire slab or <br /> i <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA by 15% <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> Vertical fenestration U=0.22 <br /> Ceiling and single-rafter or joist-vaulted R-49 advanced <br /> Wood frame wall R-21 int plus R-12 ci Floor R-38 <br /> 1.5 Basement wall R-21 int plus R-12 ci 2.0 <br /> I Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and <br /> I i under entire slab or <br /> I <br /> Compliance based on Section R402.1.4: Reduce the Total conductive UA by 30% <br /> Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br /> Vertical fenestration U=0.18 <br /> I Ceiling and single-rafter or joist-vaulted R-60 advanced <br /> j Wood frame wall R-21 int plus R-16 ci <br /> 1.6 Floor R-48 3.0 <br /> j Basement wall R-21 int plus R-16 ci <br /> Slab on grade R-20 perimeter and under entire slab Below grade slab R-20 perimeter and <br /> iunder entire slab or <br /> ' Compliance based on Section R402.1.4: Reduce the Total conductive UA by 40%. <br /> Advanced framing and raised heel trusses or rafters <br /> Vertical Glazing U-0.28 <br /> 1.7 R-49 Advanced (U-0.020)as listed in Section A102.2.1, Ceilings below a vented attic and 0.5 <br /> R-49 vaulted ceilings with full height of uncompressed insulation extending over the wall <br /> I <br /> top plate at the eaves. <br /> Prescriptive Path—Single Family 2018 Washington State Energy Code-R 4 <br />