Emergency Boiler Repair in Northfleet & Gravesend West (DA11)

The district takes in Northfleet and the west side of Gravesend. The 2021 Census puts 5,348 of its households, about a third, in terraced houses, and the Valuation Office’s count of homes by build period finds 3,280 built before 1900, nearly a fifth of its homes. No house of that age was designed with a boiler flue in mind, so every terminal on one was cut through a wall long after the house went up, wherever suited the boiler at the time. A quarter of households rent privately, 25.5% in the Census and the second highest share of the 18 DA districts, so the people living with a boiler did not always choose what has since been built in front of it.

The terminal stays put. Everything round it moves.

Flue terminals boxed in later

---

The terminal is the end of the flue on the outside wall, where the boiler’s burnt gases leave the house. Whoever fitted the boiler chose that spot because the air round it was open on the day, and it is rarely thought about again when the house changes. On a terrace the changes come one at a time. A lean-to goes over the yard. A shed goes against the back wall because there is nowhere else for it. A fence panel is swapped for a taller one, a bin store goes up, garden chairs get stacked in the corner for the winter, and ivy that was a cutting a few summers ago reaches the terminal and starts to wrap round it. A nest can end up in one. So can a trellis, or a downpipe moved during a roof repair. A neighbour’s extension can rise along the boundary beside it. None of this announces itself indoors. A boiler can keep heating the house with its terminal half covered, and the radiators feel the same as ever. Some boilers do stop: Worcester lists a blocked flue among the causes of its EA fault code, along with low gas and a blocked condensate pipe, so a lockout that keeps coming back is one reason to walk round the back and look. Others give no sign at all, which is the uncomfortable part, and why a terminal deserves a glance whenever something new goes up beside it.

A running boiler is no proof its flue is clear.

What you can safely do is look, from a step back. Is anything touching the terminal, growing over it, built round it or stored in front of it? If so, switch the boiler off and ring a gas engineer. Worcester’s instructions say a terminal less than two metres above a surface people can reach, such as the ground, a balcony or a flat roof, must have a guard, so a low terminal may have a wire cage round it. It keeps hands off the terminal. It does nothing about a shed in front of it.

Do not pull anything out of it, or cover it.

When the engineer finds a terminal like that, the boiler does not stay on. The gases it is there to clear include carbon monoxide, which has no smell, taste or colour, so nobody indoors would know if they were coming back in. With your agreement it goes off and stays off until the obstruction has gone and the flue has been checked. After that it depends on what is in the way. Chairs and bins are the easy case. Ivy has to come off the wall, and the terminal looked at afterwards. A shed or a fence can be moved. An extension is the hard one, because whether a terminal can stay where it is beside a new wall is a question for the rules on where a flue may come out, which have their own page, and sometimes the answer is that the flue has to be rerouted or the boiler moved.

If an extension means rerouting the flue on an ageing boiler, we also arrange boiler installations, and that is the time to decide where a new one should sit.