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2018 Washington State Energy Code — Residential <br />Prescriptive Energy Code Compliance for All Climate Zones in Washington <br />!-7­''- <br />Single Family TRbv&, Additions itions (effects 6rb.. ........ .. <br />Table 406.3 — Energy Credits (Single Family) <br />-Option J <br />1Description 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 />ki-roposed UA/ i arget UA)J > the required %UA reduction. <br />1.1 <br />Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br />;Vertical fenestration U = 0.24 <br />0.5 <br />1.2 <br />- - - - --- ------------------ - - <br />Prescriptive compliance is based on Table R402.1.1 with the following modifications: <br />'Vertical fenestration U = 0.20 <br />1.0 <br />Prescriptive compliance is based on Table R402.1.1 withthe following modifications: <br />Vertical fenestration U = 0.28 <br />Floor R-38 <br />1.3 <br />'Slab on grade R-10 perimeter and under entire slab below grade slab R-10 perimeter and <br />0.5 <br />under entire slab or <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: <br />,Vertical fenestration U = 0.25 <br />,Wall R-21 plus R-4 ci <br />Floor R-38 <br />1.4 <br />Basement wall R-21 int plus R-5 ci <br />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 />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 orjoist-vaulted R-49 advanced <br />:!Wood frame wall R-21 int plus R-12 ci Floor R-38 <br />1.5 <br />Basement wall R-21 int plus R-12 ci <br />2.0 <br />:Slab on grade R-10 perimeter and under entire slab Below grade slab R-10 perimeter and <br />under entire slab or <br />;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 />'Ceiling and single -rafter or joist -vaulted R-60 advanced <br />'Wood frame wall R-21 int plus R-16 ci <br />1.6 <br />I Floor R-48 <br />3.0 I <br />i <br />I 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 />under 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 />iVertical Glazing U-0.28 <br />1.7 <br />R-49 Advanced (U-0.020) as listed in Section A102.2.1, Ceilings below a vented attic and <br />0.5 <br />R-49 vaulted ceilings with full height of uncompressed insulation extending over the wall <br />top plate at the eaves. <br />Prescriptive Path — Single Family 2018 Washington State Energy Code-R <br />