Do External Fire Doors Need Intumescent Strips. Using this argument the 25mm stop was doing its job without the intumescent strip so why is it needed now. Check your door s certification look for british standard bs parts 22 and 31 or bs en 1154. An external fire door at the end i e.
Fire resisting doors must be fitted with external dual action hydraulic type. The minimum requirement is for an fd30 door to be fitted providing 30 minutes fire resistance.
In the past when intumescent strips were installed on doors with 25mm rebates the opinion then was the 25mm door stop inhibited the actuation of the strips and 12mm door stops should be used.
Its purpose is to enable the swift exit of people to safety. Does not need to have fire resisting properties and. Does not need to be kept closed. If your door does not already have grooves you will need a router and the router bit must match the size of the strip you are fitting.
