Heating

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

Underfloor heating: is it worth it?

3rd August 2026

Underfloor heating has become increasingly popular in UK homes, offering warm floors, even heat distribution and an alternative to traditional radiators. But is it really worth the investment? The answer will usually depend on your property, your budget and whether you're renovating or building from scratch.

How does underfloor heating work?

Unlike radiators, which heat the air around a single point, underfloor heating warms the entire floor surface. Heat rises gently throughout the room, creating a more consistent and comfortable temperature.

There are two main types of underfloor heating. Electric underfloor heating uses heating cables or mats beneath the floor covering. It's generally easier and cheaper to install but can cost more to run. Water (wet) underfloor heating circulates warm water through pipes beneath the floor. Installation is more expensive but running costs are often lower, particularly when paired with an efficient boiler or heat pump.

What are the benefits?

Many homeowners choose underfloor heating because it offers even, comfortable heat throughout the room without the cold spots you typically get with radiators. You have more freedom when arranging furniture, and the heating is silent, too. Coupled with the feeling of luxury and lower running costs, it’s not surprising that underfloor heating is such a popular choice. It's also an excellent partner for air source heat pumps, which operate most efficiently at lower water temperatures.

Are there any downsides?

Underfloor heating isn't the right solution for every home. They’re more expensive to install than traditional heating, with more disruption during fitting, especially in existing homes, and repairs can be complicated if the fault is under the floor. If you're renovating a single room, electric systems may be more practical than installing a wet system throughout the house.

Does it save money?

Underfloor heating can reduce energy bills in the right circumstances, but it's not guaranteed. Water-based systems often run at temperatures of around 35–45°C, compared with 55–75°C for many radiator systems. This can improve efficiency, particularly in well-insulated homes and when used with modern heating technology. However, poor insulation can significantly reduce any savings. Before upgrading your heating, it's often worth improving insulation first.

If you're building a new home or carrying out a major renovation, underfloor heating can be an excellent long-term investment. It offers improved comfort, a cleaner look without radiators and can help reduce running costs in energy-efficient homes. Similarly, for smaller projects such as a bathroom renovation, electric underfloor heating is often an affordable way to add a touch of luxury without extensive building work.

Whether you're considering electric or water-based underfloor heating, professional installation is essential for safety, efficiency and long-term reliability. Trust A Trader helps you find vetted local heating engineers and flooring specialists who can advise on the best system for your home, provide accurate quotations and carry out a high-quality installation. Want to find out more? Follow us on Facebook, Insta or Tiktok.

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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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