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...

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:...

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...

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...

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...