How to Install Electric Underfloor Heating in a Bathroom

Photo of bathroom model

Underfloor heating in a bathroom is one of the best ways to ensure that the moment you step out of a shower, you are not immediately cold. Once thought to be used only by the rich and famous, bathroom underfloor heating is actually a very economical and efficient way of heating your bathroom - as well as other rooms in the home. There are two ways of installing underfloor heating; using a 'wet' system which utilises hot water from your central heating system, or a dry version which uses electric heating to make your bathroom floor warm.

Here, we look at the latter. In our step-by-step guide to how to install electric underfloor heating in a bathroom, we outline what it takes to get this modern day luxury in your home. Plus, we look at what the average cost of underfloor heating in a bathroom is as well as highlighting any electric underfloor heating bathroom regulations.

Step-by-step guide to how to install electric underfloor heating in a bathroom

1. Prep

To ensure you install your electric underfloor heating correctly, good prep work is essential. Firstly, you need to measure how big an area you are heating. You do not need heating under your fixtures, so you need to measure around them. Then, order the amount you need, perhaps with a little extra so that you can ensure you have enough for awkward areas. Finally, clean your bathroom just before laying any underfloor heating.

2. Lay insulation

You need to lay insulate flooring underneath your underfloor heating to help prevent any heat escaping downwards, leaving it only to rise. It will do this, on the whole, naturally anyway, but it will make the final product that little bit more efficient. Put down the insulative layer until you can't see any of the original ground - even in awkward spots. Use waterproof tape to connect any gaps.

3. Lay underfloor heating

Your chosen electric underfloor heating will look like lots of wires attached to a mesh sheet. Before starting to lay it, take a resistance reading to ensure that it is working correctly.

You can lay this mesh sheeting down over the entire floor to ensure that there are no cold spots in your bathroom. In general, it is recommended to leave half a foot or 15cm between your bathroom wall and the edge of your underfloor heating.

Before laying any mesh sheet however, identify where the two wires that come off the sheet are. These are the wires which you will need to connect to your thermostat, so place them as close to where your thermostat is, or will be, as possible. You can use duct tape to attach your mesh sheeting to the floor. Make it all as flat as possible.

Take another resistance reading now to ensure that nothing was damaged during the installation.

4. Install sensors or probes

Install your sensor (which will measure how hot your floor is) by putting it between any two electrical wires in your mesh sheeting. It is best to do it as close to where the thermostat will be as possible.

5. Connect the thermostat

Now you need to connect your thermostat by connecting the wires from your mesh sheet. Then attach the thermostat to your bathroom wall. The thermostat also needs to be connected to your home's power supply, which needs to be done by an electrician.

6. Lay your bathroom floor

Now it's possible to lay your bathroom floor. Do so carefully to ensure that you do not damage the wiring beneath.

What is the average cost of underfloor heating in a bathroom?

The average underfloor heating bathroom cost will depend on how big your bathroom is as well as what your electrical tariff is with your provider. Electric heating is more expensive than gas, but it is more efficient too. It means you will need less of it, less often than gas central heating.

Electric underfloor heating bathroom regulations

Due to the electrics involved in underfloor heating, there are regulations to adhere to, to ensure that any installation is safe and keeps people from harm's way. Installations of thermostats will need the help of a registered electrician, but the entire underfloor heating in your bathroom also needs to adhere to the BSI 17th Edition IEE Wiring regulations. For that reason, it is often best to seek the advice of a professional throughout the entire installation process.

Bathroom underfloor heating is a fantastic way to heat your bathroom and home. However, it is something that needs to be done accurately, otherwise it could quickly cost you more money - as well as be dangerous too. It is definitely an area that you do not want to make unnecessary cost savings on. Check out our range of underfloor heating options today to see how it can help warm your bathroom floor.


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