Fire Protection
Insulation for Fire Protection


Passive structural fire protection is one of the most important factors in HVAC. Highly efficient insulation together with appropriate fire containment is necessary in order to prevent the spread of flames and smoke to other areas of the building.

Horizontal/Vertical rectangular ducts

Properly insulating ventilation ducts is key to containing fires in partitioning areas.  These ducts often pass through building compartments which is breached, can allow rapid spread of fire inside the building. Efficient ventilation insulation reduces the need for mechanical methods of fire protection such as sprinklers.


In accordance with The Building Regulations, when ductwork passes through any element of construction which has a designated period of fire resistance, the integrity of that compartment should be maintained.

Any vertical or horizontal, rectangular or square steel ductwork associated with ventilation and/or air conditioning systems, including ducted supply and extract systems (whether through ducts or plenums), mechanically assisted systems and those relying on natural convection can be protected with Fire-teK BD 917 to provide the required degree of fire protection.

See our duct insulation solutions

Structural Steel

Structural steel requires fire protection because it loses structural strength at temperatures that can be rapidly reached in a building fire. This will consequently have a negative impact on the structural integrity of the building.

Protecting the structural steel from the heat of a fire will delay the onset of this loss of strength and the possible collapse of the building. This is essential because it allows extra time for both the occupants of the building to escape and fire services to tackle the fire.

See our structural steel insulation solutions

We offer the best insulation solution for each application

At Knauf Insulation, we are committed to helping our customers meet the increasing demand for energy efficiency. Browse our other application pages to find out more.