Introducing the 30 minute Intumescent ABS Frame Telescopic Letterbox, the best in fire protection door hardware. Tested for 30 minute fire doors. Perfect for multi-residential buildings, the intumescent strip is designed to expand when exposed to extreme heat stopping fire being able to travel past the door. This model also comes equipped with an internal draught excluder and external weather seal for increased protection from the elements.
STRONG & STURDY - Made from sturdy aluminium, ensuring it will not rust or break easily while fitted.
FIRE RATED - Tested to 30 minutes
ALL IN ONE - Includes a draught excluder, weather seal and intumescent strip.
FINISH - Top quality polished silver finish
Next working day delivery is available on products marketed as "Next Day" and when placed before 5pm Monday to Friday. Orders containing "Next Day" and "2/3 Day" products (or other slower services e.g. "Custom Made") will be delivered in line with the slower product.
FREE Delivery on orders over £30.00. Orders under £30.00 will be charged £4.95 for delivery (plus any long length charges as detailed below)
Longer length products with have an additional delivery charge for orders under £75. For 2 day services there will be a £5.00 surcharge (if under £75), Next day delivery will have a £20.00 surcharge (This is waived for orders over £200)
You will be provided with clear tracking to track your order.
Are intumescent strips fire rated?
Yes, intumescent strips are fire rated and come in various fire-resistance classes. The fire rating will depend on the type of strip and the application. Ratings typically range from 30 minutes to 2 hours of fire protection.
Strips must be manufactured and tested in accordance with BS476 pt22 and BS EN 1634-1.
What is intumescent material?
Intumescent material expands and forms a dense char when heated or exposed to fire, increasing its volume and decreasing in density. This expansion is called intumescence.