2015 IECC

2015 IECC and the 2017 Massachusetts Stretch Code

2015 IECC and the 2017 Massachusetts Stretch Code

The MA 2015 IECC is very similar to the current 2012 IECC. Blower door and duct leakage testing thresholds remain the same, prescriptive R-values are the same, continuous ventilation and high efficacy lighting are still required. If you have successfully built to the 2012 IECC, you are in good shape.

The new Stretch Code is a bigger jump that requires a robust HERS 55.