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RN-2011-00459_0005.tif 236 PART 4 s Energy Conservation CHANGE TYPE: Clarification Sealing the ' u jl i CHANGE SUMMARY: Attic access openings and rim joist junctions have been added to the list of specific locations requiring sealing to Therm E nvelope prevent air infiltration. 2009 CODE: N1102.4.1 Building Thermal Envelope. The buildr1 "I'l ing thermal envelope shall be durably sealed to limit infiltration. The sealing methods between dissimilar materials shall allow for differei% tial expansion and contraction. The following shall be caulked, gas keted, weatherstripped or otherwise sealed with an air barrier mate rial, suitable film or solid material.; 1. All joints, seams and penetrations. t t9i 2: Site -built windows, doors, and skylights. t u 3. Openings between window and door assemblies and their re T, 1 spective jambs and framing. 4. Utility penetrations. P ec �' 5. Dropped ceilings or chases adjacent to the thermal envelope_ Y �a 6. Knee walls. t U� L� w S Se t �- �� 7. Walls and ceilings separating the garage from conditioned spa ce's j g P g g g R z 8. Behind tubs and showers on exterior walls. �w e (Q- O oQ e � 9. Common walls between dwelling units. 54A - T KC) 10. Attic access openings. r 11. Rim joist junction. 1012. Other sources of infiltration. Chimneys ) e r j U1� CYe- Nye AVJd" Co ����` Recessed Attic hatch ° lights b� L l } F Ceiling Rim joist Windows = corners r. r junctions OL 6L �e S S % require xg Electrical ®: Doors sealing { f outlets /L t" li d 1 / u., Basement f� Duct SIII F L J 1— A j N 6 6 ©g seal s y a , Sill plates Typical sources of air leakage fr t. 3 I'