Do the 2021 IECC Building Codes Benefit Spray Foam?
- By Aaron Davenport, Director of Building Science for Holcim Building Envelope, Spray Foam Division
- Added on Apr 01, 2023
The 2021 International Energy Conservation Code (IECC) is arguably the largest change in building codes to date. I’m dating myself, but when I started my career in construction, the energy codes required R11 in walls and R19 in attics. With the updated 2021 IECC, minimum energy requirements have increased to R49 for ceiling insulation in climate zones 2 and 3, and R60 for ceiling insulation in climate zones 4 and higher. read more