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236 PART 4 N Energy Conservation `
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CHANGE TYPE: Clarification
1 02 .4. CHANGE SUMMARY: Attic access openings and rim joist junctions
Sealing of the Buildi have been added to the list of specific locations requiring sealing tor;
Thermal Envelope prevent air infiltration. F rr
2009 CODE: N7102.4.1 Building Thermal Envelope. The build }x
ing thermal envelope shall be durably sealed to limit infiltration Thee
sealing methods between dissimilar materials shall allow for differen�r'
tial expansion and contraction. The following shall be caulked, gas:
keted, weatherstripped or otherwise sealed with an air barrier mate R'
rial, suitable film or solid material.y
1. All joints, seams and penetrations.g
2: Site -built windows, doors, and skylights.
3. Openings between window and door assemblies and their ref,
spective jambs and framing.
4. Utility penetrations.
5. Dropped ceilings or chases adjacent to the thermal envelope
6. Knee walls. r
�j E t e� 7. Walls lls and ceilings separating the garage from conditioned spaces:
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8. Behind tubs and showers on exterior walls.`° .
r C� �' � 9. Common walls between dwelling units. v
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10. Attic access openings.
11. Rim joist junction. -k
4812. Other sources of infiltration.
Chimneys
? ? e u� N Hv� ,c N ► c� Co n^ h 4 y Recessed
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Attic hatch lights ,
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Ceiling Rim joist'
corners
Windows - - junctions F
r * require
ex- s - U .:• Doors sealing .
Electrical }_ r�
D n ,fin n /J outlets
Basement
s Y c S' t�Ly 4
window t4
Sill Am x
Duct a
6 9 00 seal 3t_
Sill plates
Typical sources of air leakage LA ,
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