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This isn’t an article about pest control.
It’s about what happens when something enters the fabric of a building you share with other people — and how quickly your own home can stop feeling like a place of rest.
Jonny and I live in a flat. What we learned is that in shared buildings, problems don’t respect boundaries. Even when an issue starts somewhere else, you still have to live with the consequences.
How we got a rat in a flat
The rat wasn’t originally in our flat.
It was under the floor in the kitchen of our ground‑floor neighbour and worked its way through the building — up through shared voids, across our first floor bedroom ceiling… and into the loft space above our kitchen.
That’s one of the realities of living in a flat. You don’t control the whole system, but you still experience the fallout.
The sound of a rat in a flat took over our nights
The rat was chewing — loudly — on the fabric of the building.
Not once. Not briefly. But repeatedly, in the middle of the night.
It woke us again and again, like parents being woken by a newborn. Except this time, the noise wasn’t a baby — it was something actively damaging the fabric of our forever home.
There’s something uniquely unsettling about lying in bed, listening to your own home being eaten.
Getting through the night without making things worse
At first, we were just trying to cope.
We would bang carefully on the ceiling with an old ‘bo’ from karate to try to move it on — carefully, because we were trying not to damage the newly painted ceiling.
That detail says everything.
We weren’t fixing the problem. We were just trying to get some sleep without creating another one.
Professional help — and a long timeline
Eventually, we called in a friend who does pest control.
We hated the idea of bait, poison and traps… but we also felt we had no other option.
The pest control professional was upfront. He told us that if ultrasonic or electromagnetic devices reliably solved rat problems on their own, pest control companies would go out of business.
We understood his point.
His work focused on stopping access and letting things resolve over time — and that process was taking weeks.
Blocking access properly
As part of that work, air bricks were covered and non‑return valves were fitted into the main drain that led to the sewer.
That meant no more rats could enter the building that way — and if any rats left, they wouldn’t be able to get back in.
That mattered. But it didn’t immediately restore peace in our home.
The noise continued.
Living with a rat in a flat — and the uncertainty inside your own walls
At that point, the rat itself wasn’t the worst part.
The worst part was:
not knowing if it was still there
not knowing when it would start again
not knowing how long this would drag on
Sleep became fragile. Our bedroom stopped feeling neutral. The flat felt compromised.
We weren’t looking for a perfect solution.
We were looking for calm.
Creating a hostile environment for the rat in a flat
While access was being handled professionally, we decided to address how it felt to live there.
We weren’t trying to exterminate anything ourselves. We were trying to make our loft a less attractive place to stay.
We introduced multiple sources of constant disturbance (these are affiliate links. If you buy through them, we may earn a small commission at no extra cost to you. This doesn’t influence what we write.):
plug-in electromagnetic rat deterrent devices (designed to work through the building’s wiring);
ultrasonic deterrents, both static and variable frequencies The static ones needed 9v batteries, the variable ones were rechargeable;
AND a small portable rechargeable radio left playing overnight to simulate human activity.
The intention was continuous discomfort — a kind of cacophony.
We read somewhere that for the rat in a flat it would be like having a smoke alarm going off all the time: not dangerous, but impossible to ignore.
How we added things gradually
We didn’t add everything at once.
We started with a simple battery-operated static ultrasonic deterrent. It made sense to try the least intrusive option first. On its own, it didn’t make an immediate difference.
A few days later, we added electromagnetic devices. Again, there was no instant change.
Only after that did we introduce variable ultrasonic devices — alongside the electromagnetic units and the radio — so that the disturbance inside the building was constant and unpredictable.
We can’t say which element mattered most. What we can say is that the combination felt very different to anything we’d tried before.
That’s when things changed.
What we noticed
What we do know is that the noise in our loft stopped. Shortly afterwards, two exit holes appeared in the front garden. We can’t say with certainty what combination of the professional work and the deterrents made the difference — but something shifted, and the problem resolved.
Why we’re sharing this
We’re not pest control experts.
We’re not saying this will work for everyone or that devices replace professional help.
We’re sharing it because this experience taught us something important: sometimes the most distressing part of a problem isn’t the problem itself — it’s living with unresolved uncertainty inside your own home whilst waiting for the professionals to do their side of things. And rats are notoriously clever creatures. They’ve survived for thousands of years by being careful. So they ignore new things – like traps and poison bags.
So we took back some control and fought back with something they couldn’t just ignore or avoid contact with.
What we used
These are not recommendations and we’re not suggesting they work in isolation. We’re simply sharing what we chose at the time, and in the order we added them.
Ultrasonic deterrent (static) with batteries
Plug-in electromagnetic deterrent device
A small rechargeable portable radio
Why dealing with a rat in a flat matters more as you get older
As you get older, your tolerance for ongoing disruption drops.
You don’t want weeks of broken sleep or problems that hover unresolved.
You want your home to feel settled.
This wasn’t about winning against a rat. It was about restoring rest, calm and the feeling that our home was ours again.
Final thoughts on the rat in a flat
Living in a flat means accepting that you don’t control everything.
But independence isn’t about control. It’s about how much disruption you’re willing to live with when things go wrong.
For us, getting rid of the rat in a flat meant creating an environment that caused the rodent to rethink its choice of night-time entertainment. Which, in turn, made it possible for us to sleep and feel settled again — quietly, without drama, and on our own terms.