20/02/2026
⚠️ THIS is why annual boiler checks matter ⚠️
Found this during a routine boiler service today.
That hole in the flue wasn’t visible from the outside — it was found inside the cavity. From the outside everything looked fine, but inside the metal had completely corroded through.
A damaged flue like this can allow harmful fumes, including carbon monoxide, to leak before they safely exit the property. And if it’s inside a cavity, you’d never know without a proper inspection.
This boiler was still running.
The customer had no idea there was an issue.
✔️ Flues corrode over time
✔️ Weather and condensation speed it up
✔️ It often starts from the inside out
✔️ Hidden faults can’t be spotted without checks
An annual service isn’t just about keeping your heating working — it’s about protecting the people inside the house.
If your boiler hasn’t been checked in the last 12 months, don’t put it off.
📩 Message me to get booked in.
Gas safety isn’t something to take chances with.