Question 1: When all of the requirements in Paragraph 2603.4 are applied, is it permitted to use Foam-
Plastic insulation such as EIFS inside of an interior wall of a fully sprinklered building of any type of construction?
Question 2: Are the requirements in section 2603.4 to be applied only to foam-plastic material located on the
outside of a building such as EIFS or can they to be applied to other interior insulated walls containing
EIFS?
Interpretation #7945
Published September 22, 2026
Original Request
- Code Version
- 2004
- Code
- BUILDING
- Code Description
- Chapter
- 26
- Section
- 2603.4
- Topic
- Exterior Insulation Finish System (EIFS)