Presents2012 Revisions to the NC Energy Code For Residential

Building started after March 1, 2012

THERMAL ENVELOPE

Must meet the R value requirements set forth in table 1102.1

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.

AIR BARRIERS Skylights, Windows and Doors:

INSULATION

THERMAL ENVELOPE

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

INSULATION CONT.

THERMAL ENVELOPE

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.)

If exposed foam plastic is used on any access make sure it meets the NC provisions for residential code

INSULATION CONT.ACCESS HATCHES & DOORS:

THERMAL ENVELOPE

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.

INSULATION CONT.CEILINGS W/OUT ATTIC SPACE ABOVE:

THERMAL ENVELOPE

Attics that are fully enclosed require an insulation of R-30.

INSULATION CONT.CEILINGS WITH ATTIC SPACE ABOVE:

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.

Builder’s are now allowed 15 sq. ft. of non-compliant U- factor and solar heat gain coefficient.

DECORATIVE DOORS & WINDOWS

THERMAL ENVELOPEHVAC & 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.

1.In conditioned space where heat and AC are always available no insulation is required.2. In semi-conditioned spaces such as closed crawl spaces and sealed attics, R-4 insulation is required.3. In unconditioned space, such as vented crawl spaces and unconditioned attics require R-8 insulation.

3 CONSIDERATIONS FOR DUCT INSULATION

All ducts, air handlers, filter boxes and building cavities used as return ducts must be sealed

THERMAL ENVELOPEHVAC & DUCTSDUCT 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.

Results must be properly noted on the energy efficiency certificate.

THERMAL ENVELOPELIGHTING 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.

THERMAL ENVELOPEPERMANENT 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.

1. On or in the electrical distribution panel as long as it doesn’t block or cover circuit directory labels.2. A kitchen cabinet.3. In the attic by the insulation card.4.Or another location as specified in the code.

This concludes our presentation of the 2012 NC Energy Conservation Code Amendments as of

March 1, 2012

Thank You from all of us at

1721 Allen’s Lane Suite, 202 Wilmington, NC 28403 (910) 256 5313 www.kenthomes.net