Gary Wicks

I have a question regarding Fire Doors and Smoke Detection. When to fit smoke seals to a fire door and when to fit an additional smoke detector? As we know smoke alarms are activated when they detect smoke, but what happens if that flow of smoke is prevented by a fire door with cold smoke seals? As an example there are a number of fire alarm designs that have smoke detection in the escape routes, some rooms immediately off the escape route may have detection and some may not, but the rooms could all be fitted with fire doors. If a fire breaks out in a room with no detection the door to the escape rout could prevent the travel of smoke to the nearest detector which could delay the detection of the fire, which could result in the loss of both life and property! Should we therefore only fit intumescent seals to these doors???