How Do Intumescent Strips Work On Fire-Rated Doors?

 

The fire rating provided by intumescent strips depends on the type of strip and the door’s fire rating. Most intumescent strips are designed to work with doors rated for 30 minutes (FD30) to 60 minutes (FD60) of fire protection. Some higher-rated strips can be used on doors with ratings up to 90 minutes (FD90) or 120 minutes (FD120). The fire rating of the door and the correct installation of the intumescent strips will determine how long the door can withstand fire and smoke. Always ensure that the strips you use are rated for the same or higher fire resistance as the door itself.

 

 

The main difference between intumescent strips and smoke seals lies in their function and materials. Intumescent strips are primarily designed to react to heat and expand when exposed to fire, creating a barrier that prevents smoke, flames, and hot gases from passing through the gaps in a fire-rated door. Smoke seals, on the other hand, are designed specifically to prevent smoke from leaking through the gaps under normal conditions, without expanding in the presence of heat. While both are crucial for fire-rated doors, intumescent strips provide fire protection, while smoke seals focus on smoke containment.

 

 

Yes, intumescent strips are relatively easy to install. They are typically pre-adhesive, meaning they come with a self-adhesive backing that allows for quick application. Most strips can be simply stuck along the edges of the door or door frame. However, professional installation may be recommended for optimal performance, especially for compliance with regulations. The strips are available in various sizes and shapes, making it easy to find the right fit for your fire-rated door. Proper installation ensures that the door will function correctly during a fire and maintain its fire-resistance rating.