What is the Fire Rating of the Intumescent Strips?
The fire rating of intumescent strips typically ranges between 30 minutes and 120 minutes, depending on the specific product and its application. The fire rating refers to the amount of time the strip can withstand fire before losing its effectiveness. For example, a
30-minute fire-rated strip (FD30) will continue to expand and seal gaps for up to 30 minutes during a fire, while a 60-minute or 120-minute rating provides a higher level of protection. The fire rating of intumescent strips must be selected to match the fire rating of the door or window they are being used with, ensuring that both components work together to provide maximum fire protection.
How do Intumescent Strips Work in a Fire?
Intumescent strips work by expanding in response to heat. Under normal conditions, the strip remains in a compact, flexible form, allowing it to be easily installed around door and window frames. When exposed to temperatures above 100°C (the exact temperature varies depending on the product), the materials within the strip begin to chemically react, causing them to swell rapidly. This expansion fills the gaps around doors or windows, effectively sealing them against smoke and flames. As the strip expands, it creates a dense, insulating barrier that prevents the passage of heat, smoke, and fire, helping to protect the integrity of fire-rated doors and windows.
Are These Strips Compliant With UK Fire Safety Standards?
Yes, intumescent strips are compliant with UK fire safety standards when manufactured to the appropriate regulations. They are generally tested and certified to meet the requirements set out in the British Standard BS 476, which covers the fire resistance of building materials and components. Some intumescent strips are also tested to BS EN 1634-1 (the European standard for fire resistance of door and shutter assemblies), ensuring their suitability for fire door installations. In addition, intumescent strips should be CE marked or tested according to relevant UK or European standards to guarantee their effectiveness in fire protection. Always verify that the product meets the required certifications before installation.
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