Interior Wall and Ceiling Finish

OCCUPANCY TYPE (new building)
CODE REF. INTERIOR WALL AND CEILING FINISH
AMBULATORY (Sprinklered) NFPA 101, 2012 (20.3.3, 38.3.3.2, and 10.2.3) Class A, B, or C
AMBULATORY (Not Sprinklered) NFPA 101, 2012 (20.3.3, 38.3.3.2 and 10.2.7) Class A, or B in exits or corridors Class A, B, or C in offices
BUSINESS (Sprinklered) NFPA 101, 2012 (38.3.3.2 and 10.2.3) Class A, B, or C
BUSINESS (Not Sprinklered) NFPA 101, 2012 (38.3.3.2 and 10.2.3) Class A, or B in exits or corridors Class A, B, or C in offices
HEALTHCARE NFPA 101, 2012 (18.3.3.2 and 10.2.3) Class A, or B
EDUCATIONAL (14.3.3.2 and 10.2.3) Class-A for Exit Enclosures
Class-B or Class-A for other than exits
Class-C, Class-B or Class-A for low height partitions <1525mm
ONE & TWO FAMILY DWELLINGS
(24.3.3.1 and 10.2) Class-A, Class-B or Class-C
HOTELS AND DORMITORIES
(28.3.3.2 and 10.2) Class-A for Exit Enclosures
Class-B or Class-A for Lobbies and Corridors
Class-C, Class-B or Class-A for other spaces
APARTMENTS
(30.3.3.2 and 10.2) Class-A for Exit Enclosures
Class-B or Class-A for Lobbies and Corridors
Class-C, Class-B or Class-A for other spaces
MERCANTILE
(36.3.3.2 and 10.2) Class B or Class-A
STORAGE
(42.3.3.2 and 10.2) Class-C, Class B or Class-A

Flame Spread Ratings

Class A – Flame-spread 0-25, smoke developed 0-450.

Class B – Flame-spread 26-75, smoke developed 0-450.

Class C – Flame-spread 76-200, smoke developed 0-450.

(what-is-flame-spread-and-smoke-developed?)


The requirements pertaining to interior finish are intended to restrict the spread of fire over the continuous surface forming the interior portions of a building.

“Interior wall or ceiling finish that is required elsewhere in this Code to be Class A, Class B, or Class C shall be classified based on test results from NFPA 255, ASTM E-84, or UL 723.”


Notes:

  • Code Reference used is NFPA-101 2012 edition unless otherwise noted.
  • These information is not complete and intended to be used as quick references only, always refer to NFPA or your local codes for complete information.
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