What is the maximum allowable flame spread index for wall and ceiling finishes?

The maximum allowable flame spread index for wall and ceiling finishes is set at 200. This standard is guided by safety regulations to ensure that materials used in construction do not contribute excessively to fire spread within a building.

A flame spread index of 200 means that the material will not ignite or contribute significantly to the growth of fire when tested under controlled conditions. This standard is particularly important in protecting occupants and property, as materials with lower flame spread indices help to contain flames and smoke, enabling safer evacuation routes and minimizing property damage.

While there are lower thresholds for more stringent applications, such as specific types of buildings or areas where fire risk is particularly high, the 200 index serves as a baseline for general construction practices under typical circumstances. Understanding these regulations is crucial for compliance and for ensuring the safety and durability of constructed environments.