When we assess a building for fire safety, one of the aspects we look for is effective fire compartments. We look for any breaches (holes) in ceiling and walls and also whether the materials used will provide adequate resistance to fire.
Put simply, if a fire starts in one room or area (compartment), fire and smoke should not be able to spread to another compartment for a specified period of time. Typically this is 30 minutes but in some circumstances could be an hour or more.
In some situations you will require fire doors to be fitted to certain rooms - this may be because the operations that occur inside pose a higher fire risk (e.g. kitchens) or maybe you only have one route of escape and so you need to protect that escape route from smoke and fire so that the occupants of the building have enough time to escape. (This is why we don't prop open fire doors!)
Whether or not you need fire doors will normally be decided by a fire risk assessment. A fire risk assessment should also check any fire doors fitted, close correctly (using a closing device), are in good condition, are fitted with intumescent strips (or intumescent strips with smoke seals) and that they fit tightly enough into the frame to provide an adequate barrier to smoke and fire.
Lancashire Fire Protection can install fire doors to replace your existing doors and we can even arrange to have them painted for you.
We are ideally situated to cover Manchester, Liverpool and the North West of England. Should you have a requirement that is further afield, we may still be able to help you; just call us to discuss your requirement.