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Presents

Presents. 2012 Revisions to the NC Energy Code For Residential Building started after March 1, 2012. THERMAL ENVELOPE. AIR BARRIERS. Skylights, Windows and Doors :. Must meet the R value requirements set forth in table 1102.1. INSULATION.

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Presents

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  1. Presents • 2012 Revisions to the NC Energy Code For Residential Building started after March 1, 2012

  2. THERMAL ENVELOPE AIR BARRIERS Skylights, Windows and Doors: • Must meet the R value requirements set forth in table 1102.1 INSULATION • Should be installed in constant contact with the air barrier and should be free of gaps, voids or compression • Must be properly installed and incapsulated behind tubs and showers, under stairs, inside fireplace cavities and behind attic walls.

  3. THERMAL ENVELOPE INSULATION CONT. • For framed walls cavity insulation must be surrounded on all sides with a rigid material or air barrier such as plywood, sheetrock or thermal ply. • All walls floors and ceilings must be air sealed. That includes chases and dropped ceilings which must be capped. • To separate conditioned space with unconditioned space, blocks must be placed directly under knee walls

  4. THERMAL ENVELOPE INSULATION CONT. ACCESS HATCHES & DOORS: • If exposed foam plastic is used on any access make sure it meets the NC provisions for residential code • All access doors and hatches must be weather stripped and insulated. Vertical access doors on require R-5 insulation. Horizontal access doors require R-10 insulation. One exception is pull down stairs will be insulated to an R-5 value. (Remember that non-rigid insulation is not allowed but attic hatches that enclose the stair system are allowed.)

  5. THERMAL ENVELOPE INSULATION CONT. CEILINGS W/OUT ATTIC SPACE ABOVE: • Cathedral ceilings, bay windows, and other areas with out sufficient space for insulation may meet the minimum requirement of R-30. The reduction in the requirement is limited to 500 sq. ft. Any area greater than 500 sq. ft. must meet the R value requirement as listed in table 1102.1 for your climate zone.

  6. THERMAL ENVELOPE INSULATION CONT. CEILINGS WITH ATTIC SPACE ABOVE: • Attics that are fully enclosed require an insulation of R-30. • Where space is limited, for example, where the roof, ceilings and wall assemblies adjoin, insulation must on fill the space up to the air baffles. DECORATIVE DOORS & WINDOWS • Builder’s are now allowed 15 sq. ft. of non-compliant U- factor and solar heat gain coefficient.

  7. THERMAL ENVELOPE HVAC & DUCTS • Heating and cooling equipment must be sized in accordance to NC mechanical code. The energy efficiency of these machines must be in NAECA minimum standards. 3 CONSIDERATIONS FOR DUCT INSULATION • In conditioned space where heat and AC are always available no insulation is required. • In semi-conditioned spaces such as closed crawl spaces and sealed attics, R-4 insulation is required. • In unconditioned space, such as vented crawl spaces and unconditioned attics require R-8 insulation. • All ducts, air handlers, filter boxes and building cavities used as return ducts must be sealed

  8. THERMAL ENVELOPE HVAC & DUCTS • Results must be properly noted on the energy efficiency certificate. DUCT TESTING • Duct testing is required. Total duct leakage must be less than or equal to 6 cubic ft per min for every 100 sq. ft. of conditioned floor area when tested at a pressure differential of 25 pascals.

  9. THERMAL ENVELOPE LIGHTING FIXTURES • When recessed lighting fixtures are used in the thermal envelope, they must be sealed with a gasket or caulk between the housing and the ceiling covering. • A minimum of 75% of the bulbs installed in permanent light fixtures must be high-efficiency.

  10. THERMAL ENVELOPE PERMANENT CERTIFICATE • A permanent certificate must be completed by the builder, permit holder, or a registered design professional, then posted in one of the several approved locations in the finished house. • On or in the electrical distribution panel as long as it doesn’t block or cover circuit directory labels. • A kitchen cabinet. • In the attic by the insulation card. • Or another location as specified in the code.

  11. Thank You from all of us at • This concludes our presentation of the 2012 NC Energy Conservation Code Amendments as of March 1, 2012 1721 Allen’s Lane Suite, 202 Wilmington, NC 28403 (910) 256 5313 www.kenthomes.net

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