Laserfiche WebLink
Permit No. <br />Use only for additions, under 750 ft2, that don't comply <br />Effective July 1, 1991 <br />PURPOSE: This worksheet demonstrates compliance for a <br />proposed addition where heat loss improvements in the existing <br />h ome receive credit toward compliance. Perform a Chapter 5 <br />calculation only on the addition before using this form. <br />Existing dwelling a n d <br />Improvement U-values: <br />Refer to the 1991 WSEC, Chapter 10, <br />for all U-values not listed below. <br />Existing (untested) glazing default <br />values: <br />Single pane U 1.20 <br />Double pane U .90 <br />Double pane w/vinyl <br />or wood sash U .75 <br />Existing building envelope values: <br />Ceilings w/no insulation U .30 <br />Floors w/no insulation U .13 <br />Walls w/no insulation U .31 <br />Glass block U .60 <br />>r,yx <br />MAIN WORKSHEET <br />PROPOSED CA UA VALUE (pg. 2) <br />BASE CASE UA VAL E (pg. 2) <br />Addition heat loss deficit ex 1 minus box 2) <br />Existing dwelling improveme credit. See M&W <br />I ADDITION COMPLIES IF BOX 4 . GREATER THAN BOX 3 <br />m, <br />Existing Dwelling Improvement credit <br />catculations /List separate improvements) <br />Chant a (Incation) <br />Area (F12) <br />U-Valuc <br />UA <br />INSPECTED <br />Existing glazing ( ) <br />x <br />(a) <br />Replacement glazing ( ) <br />x U <br />(b) <br />Existing home Improvement credit <br />SUBTRACT (b) frcm (a) <br />(c) <br />Existing glazing ( ) <br />x U_ <br />) <br />Replacement glazing I-) <br />x 11 <br />(e) <br />Existing home Improvement credit <br />SUBTRACT (e) from (d) <br />(f) <br />Existing insulation ( ) <br />x U_ <br />(g) <br />New insulation ( ) <br />x U_ <br />(h) <br />Existing home Improvement credit <br />SUBTRACT (h) fran (g) <br />(1) <br />Existing insulation I-) <br />x U__ <br />Q) <br />New insulation ( 1 <br />x U__ <br />(k) <br />Existing home Improvement credit <br />SUBTRACT (k) from <br />TOTAL CREDITS (Add c, f, i, B I. Insert into <br />aon MAIN IVORKSHEET) <br />WEEsWWLvwr GVEM6EF <br />Page 22 <br />31 <br />