Underfloor Heating FAQs

After 13 years in the industry, there isn't much we don't know about underfloor heating. Below are some of our most frequently asked floor screeding questions. If you have a query or a project we'd love for you to get in touch

General Questions

General questions

What is Underfloor Heating?

Underfloor heating (commonly known as UFH) is a heating alternative to radiators and is installed under a screeded floor.


What are the benefits of underfloor heating?

There are many benefits to underfloor heating such as comfort, hygiene, and economic savings. Due to an even distribution of heat, underfloor heating allows for better efficiency and is also a great way to save you on energy bills in the long term.


Which type of underfloor heating is best, wet or electric?

This can depend on the application. Wet underfloor heating systems have better thermal performance and are cheaper to run, however electric underfloor heating systems do not require a screed and may be better suited for areas with not enough coverage such as renovations.


How does a wet underfloor heating system work?

Warm water is distributed through a circuit of pipes that are encased in screed under a finished floor. The heat rises through the surface of the floor and into the room, working as a huge radiator. The temperature of the room can be easily adjusted and controlled by wired or wireless thermostats. The even distribution of heat from the ground upwards allows the room to warm up quicker and hold it’s the temperature for longer, unlike radiators which burn through a lot more energy to heat a room to the same extent.


How does electric underfloor heating system work?

An electric underfloor heating system works by sending an electric current through a wire in the floor. Once the system is turned on the current heats up the wire, in turn heating up the screed and/or final floor finish above. Electric underfloor heating can be installed under a screed or beneath a 10mm levelling compound.


What type of buildings are suitable for underfloor heating installation?

Due to its cost efficiency and easy control systems, this makes underfloor heating suited to domestic or commercial use, whether it’s for a kitchen, lounge, office or school.


Can underfloor heating be used as the primary heat source in the building?

Yes, underfloor heating can be used instead of or as well as radiators


Do I need insulation with underfloor heating?

Yes, insulation increases the efficiency of the underfloor heating system used.


How much insulation do I need for underfloor heating?

This can depend on your build’s design. Most new builds will require a minimum of 75-150mm of insulation. Some existing buildings can either use thinner insulation or an insulated quilt providing there is insulation in the existing slab.



Does underfloor heating have to be installed on the ground floor?

No, underfloor heating can be installed on any floor using a wet or electric system.


What floor screed works best over the top of underfloor heating?

We advise using liquid screed over underfloor heating due to its high thermal conductivity however traditional screed can also be used. If using liquid screed on smaller projects we can prepare, install underfloor heating and screed on the same day, saving time on your build!


Can I lay underfloor heating in any weather?

Yes, however we recommend that antifreeze is used when your underfloor heating is installed in the colder months.


How thick does the floor screed need to be on top of underfloor heating?

This can range depending on the type of screed you install. Whether it’s a gypsum liquid screed or a high strength product can affect the depth a screed should be with UFH.



Does underfloor heating require a lot of maintenance?

Once installed and commissioned, we recommend an annual service the same as with boilers and heat pumps.


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