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Heating

Advice on boilers, radiators, central heating systems and keeping your home warm and energy efficient.

Heating

Frozen Pipes: What To Do

We have discussed what you should do to prevent your pipes from freezing. Of course, hindsight is a wonderful thing, but if your pipes do freeze, there are steps you can take to limit the damage and distress caused by flooding.

We have discussed what you should do to prevent your pipes from freezing. Of course, hindsight is a wonderful thing, but if your pipes do freeze, there are steps you can take to limit the damage and distress caused by flooding.

Frozen pipes aren’t a common problem in the UK, which is why, on the occasions when temperatures do drop dramatically, we tend to be ill-prepared. In the last four days of November, London fire crews attended over 163 floodings and Thames Water answered 150 calls a day, as the result of burst pipes.

Finding that your pipes are frozen is serious: when you first notice that your taps don’t run when you switch them on, you may be a little baffled or even amused, but when the ice thaws, you could have a serious problem on your hands. Here’s what to do:

  • As soon as you notice that your pipes are frozen, turn your water supply off at the stopcock.
  • Contact a local emergency plumber and arrange for them to come out as soon as possible, to assess and repair any damage (they may also give you instructions on what to do, and what not to do).
  • Do your best to find the burst area (look in the loft first, as these pipes get the coldest).
  • Once you have located the pipes that you think have burst, protect anything around it.
  • Turn the tap nearest to the burst pipe on. This way, as the pipe thaws, the water will come through the tap, and not through the damaged pipe.
  • Starting at the tap end, slowly heat up the frozen pipes to thaw the ice. You can do this using a hot water bottle or hairdryer.

If your pipes freeze and burst, and you don’t detect it or manage to address it before the ice thaws, switch off the stopcock and contact your insurer immediately, followed by the number of a local plumber you trust. It is a good idea to have a list of emergency numbers in an easily accessible place so that, in the case of emergencies, you know who to call. Above all, in any emergency in the home, it is important that you stay safe; life is much more valuable than possessions, and although distressing, most items can be replaced by the insurers.

If you are in any doubt about the safety of your pipes, or about what to do in the event of a flood, contact a local plumber who, for an agreed call out fee, will be happy to help.

Looking for more heating advice?

Find clear, practical answers to common heating questions, helping homeowners understand everyday issues, know what checks they can carry out safely, and when it is best to contact a qualified professional.

  • What is the difference between a combi boiler and a system boiler?

    A combi heats water straight from the mains on demand - no cylinder needed, which makes it compact and ideal for smaller homes or flats. A system boiler works with a hot water cylinder, storing a ready supply that can serve multiple taps or showers at once without the pressure dropping - better for larger homes with more bathrooms. There's also the conventional boiler, which needs both a cylinder and a cold water tank in the loft - common in older properties. A heating engineer can help you figure out which suits your home best.

  • Is an air source heat pump right for my home?

    Heat pumps pull warmth from the outside air (even when it's cold) and use it to heat your home and hot water. They work best in well-insulated homes, ideally with underfloor heating or larger radiators that work well at lower temperatures. In draughty or poorly insulated properties, the benefits are more limited. The Boiler Upgrade Scheme currently offers a grant of up to £7,500 towards installation, so it's worth getting a professional assessment to see whether your home is a good fit before committing.

  • How often should a boiler be serviced?

    Once a year, by a Gas Safe registered engineer. It keeps the boiler running safely, catches small issues before they become expensive, and is usually a condition of the manufacturer's warranty. Some home insurance policies require proof of regular servicing too. If you're not sure when yours was last done, book one before winter - better to find out before you're sitting in a cold house!

  • Why is my radiator cold at the top but warm at the bottom?

    This issue is almost always trapped air. Bleeding the radiator - using a radiator key to release the air - usually sorts it, and it's one of the few heating jobs you can safely do yourself. If bleeding it doesn't work, or if several radiators are having the same problem, it might be a pressure or pump issue. Worth getting a heating engineer in to have a look.

  • What are the signs my boiler needs replacing?

    Keep an eye out for: frequent breakdowns, energy bills going up without using more heat, unusual noises (banging, kettling, or whistling), a flame that's yellow or orange instead of blue, and any visible leaks or rust around the unit. If your boiler is over fifteen years old and ticking any of those boxes, replacing it is usually the more economical choice - modern boilers are significantly more efficient.

  • Is underfloor heating worth it and do I need a professional to install it?

    For a new build or a big renovation, underfloor heating is often a great investment - it heats rooms more evenly than radiators and can be more efficient, especially alongside a heat pump. Retrofitting in an existing home is more of a job, and how worthwhile it is depends on your floor types and how much disruption you're happy to deal with. Either way - wet or electric - it has to be installed by a qualified professional.

  • Why does my boiler keep losing pressure?

    Some pressure drop over time is normal, but if you're topping it up regularly there's usually a cause: a small leak in the system (which isn't always easy to spot), a pressure relief valve that's releasing water, or air in the system after bleeding radiators. Topping it up via the filling loop is fine as a short-term fix, but if you're doing it more than a couple of times a year, it's worth getting an engineer to look into why it keeps happening.

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