Fire Compartmentation in Flats and HMOs: What’s Required?

If you live in a flat or run a House in Multiple Occupation (HMO), fire safety should be high on your list – once a fire starts, it can spread fast. One of the main ways to slow down a fire and give people time to escape is something called fire compartmentation. It might sound a bit technical, but it’s really just about dividing a building into sections that help keep fire, smoke, and heat from moving from one part to another too quickly.

Fire compartmentation works by building in extra fire resistance into walls, ceilings, doors, and floors. This way, if a fire starts in one flat or room, it doesn’t rush through the rest of the building. Proper fire compartmentation gives people more time to get out and gives firefighters a better chance to do their job. If you want to learn more about the materials involved and how they work, a useful starting point is fireresist.co.uk — they share practical information about fireproof systems without getting too technical.

So, what’s required in flats and HMOs? For starters, each flat in a block should be a separate compartment. That means the walls, floors, and doors around it need to stop fire from spreading for at least 30 to 60 minutes, depending on the size and use of the building. The front door of each flat should be a proper fire door – not just a solid door, but one that can hold back flames and smoke for at least 30 minutes.

In HMOs, things are a little different. If people are renting rooms but share a kitchen, bathroom, or hallway, the fire protection must take that layout into account. Typically, the escape routes, like hallways and stairs, need to be protected for at least 30 minutes. The same timing usually goes for fire doors on bedrooms, too. It might seem like a lot of effort, but it’s all about helping people get to safety in time.

And finally, keep an eye out for gaps or damage – even small cracks in a ceiling, wall, or around pipes can mess up all that protection. Fire and smoke can sneak through the tiniest spaces. So make sure these are filled with proper fire-resistant materials.

Fire safety isn't just about following rules – it's about making sure people stay safe, even in the worst situations. A little effort now could make a big difference later.

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