An intumescent mat is a type of passive fire protection material. It is designed to expand when exposed to heat in order to create a barrier between the heat source and the combustible material. This expansion helps to prevent or delay the ignition of the combustible material, providing additional time for evacuation or extinguishment of the fire.

What is an intumescent mat?

An intumescent mat is a passive fire protection device that is used to prevent the spread of fire. The mat is made of a material that expands when exposed to heat, creating a barrier between the fire and the rest of the structure. Intumescent mats are typically installed in wall and ceiling cavities, as well as around ventilation openings.

How does an intumescent mat work?

When a fire starts, the heat from the flames causes the intumescent mat to expand and create an insulating barrier. This barrier protects the underlying material from the intense heat of the fire, preventing it from igniting or catching fire.

The intumescent mat is made up of a series of layers, each of which serves a specific purpose. The outer layer is typically made of fiberglass or another heat-resistant material. This layer protects the mat from damage and prevents it from catching fire itself.

The next layer is usually made of an expansion agent, such as cellulose or vermiculite. This agent expands when exposed to heat, creating an insulating barrier between the heat source and the underlying material.

The final layer is typically made of a fire retardant material, such as gypsum board or asbestos. This layer prevents the spread of fire by inhibiting combustion.