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Utah Building and Energy Code Discussion: Under-Floor Spaces (Crawlspaces)
Author: Brent Ursenbach This code discussion is based on the 2015 International Residential Code (IRC) as currently adopted, including Utah Amendments where applicable. State Amendments to sections from IRC code quoted are identified with red text. Italics indicate...
International Energy Conservation Code (IECC) Commercial Provions for Heated Water Supply Piping
Question: For many years hot water piping has been typically installed to restroom fixtures as represented in Option 1 below. An Inspector has told us the IECC requires piping configured as shown in Option 2. Is this a mandatory requirement, and if so why? Answer:...
Townhouses and the REScheck Compliance Option
Question: We have a project with 2-unit and 3-unit townhouses. Is a separate REScheck required for each unit and how do we treat the common walls between units? Answer: First a review of a definition from the IRC (International Residential Code) is useful in the...
Insulating Ducts with Building Insulation
The question: is it acceptable to simply insulate under and around the ducts with the building insulation? Referring to the IECC: R403.3.1 Insulation (Prescriptive). Supply and return ducts in attics shall be insulated to a minimum of R-8 where 3 inches (76 mm) in...
Thermal Factors – R-values, U-factors & SHGCs – Consistency on all Construction Documents
Question: I submitted plans to a city for review, which was rejected because the R-values on the plan sheets did not match the R-values on the REScheck or COMcheck. Why are they being so nit-picky? Thermal Factors- R-values, U-factors & SHGCs – Consistency on all...
Duct Leakage Testing
Question: Do I have to test residential ducts located outside the thermal envelope if I use the Performance or ERI Path for IECC Code Compliance? How do the Utah state amendments affect the testing requirement for ducts?I have received numerous questions regarding...
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