PA Energy Code PA Check


The Pennsylvania UCC has been adopted by over 90% of the municipalities in the state. Check with your local code official to determine its applicability in your jurisdiction.

The IECC 2015 states that the residential provisions apply to "Residential Buildings", which are defined as "detached one- and two-family dwellings and multiple single family dwellings (townhouses) as well as Group R-2, R-3 and R-4 buildings three stories or less in height above grade plane".  This definition excludes buildings with transient occupants, such as hotels and boarding houses, but it includes most other low-rise housing.

Occupancy Type Descriptions 

Existing Buildings:

Unlike the 2009 IECC, the 2015 IECC includes a section (Chapter 5, Existing Buildings) clarifying that it is intended to apply to additions and major renovations in addition to newly constructed dwellings.  Pennsylvania has adopted this chapter in its entirety.

Editorial Comment:

The 2015 IECC requires testing to verify that whole envelope air leakage and duct leakage rates fall below specified thresholds.  This testing will be challenging to complete accurately when testing additions, where the leakage of the existing structure may affect the test results of the new components.  Successful implementation of the new existing building requirements will require a degree of cooperation and improvisation by builders, testing contractors, and code officials.

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