Underfloor heating in existing buildings

When installing underfloor heating in a new build, it's usually fitted in a screed that is being laid anyway, making it the most common and easiest method.

However, when it comes to installing in an older building, there are more underfloor heating methods to choose from.

A growing number of people are looking to incorporate more energy efficient heating methods into their home, and it's likely that you'll be asked to install underfloor heating in an existing property moving forward.

The benefit to your customers speaks for itself - it allows a property owner the freedom to design their home how they want without accounting for radiators, and running at a lower flow temperature means that they can be more efficient than radiators. In fact, the cost of running a warm water underfloor system could be up to 30% cheaper than a radiator system.

fit from above aluplate

Fit From Above underfloor heating - EasyFix™ AluPlate™

Fitting an AluPlate™  fit-from-above (or FFA) system is quick, easy and adds minimal additional weight. There’s also no increase in floor height when placing it between joists, which makes it attractive to a lot of people (If you install it between battens, or ‘over joist’, then the increase in floor height is still minimal).

It comes in a variety of sizes and pipe spacing to make your installation easy.

fit from below aluplate

Fit From Below underfloor heating - EasyFix™ AluPlate™

This allows underfloor heating to be installed below existing floors that have already been laid on the joists. Using EasyFix™ AluPlate™ fit-from-below will mean you don’t add any height to the floor, making it perfect for a number of your customers. It’s not the easiest system in the world to fit compared to laying a pipe on insulation and screeding it, but if your only option is to be able to work from below the joists, then this system is the best out there.

Joisted floor drymix underfloor heating

Between joists underfloor heating - Drymix

This popular installation method has been tried and tested in the UK and across Europe, and proven to be ideal for an existing floor.  Insulation is installed between the joists, then FlowMaster™  UFH pipe is stapled to it. Finish off the job with a 8:1 dry mix. This is a low-cost method, as it uses existing building materials. Since there’s no wet or conventional screed, there’s also no drying time, making it an attractive method for you and your customers.

The additional weight loading is minimal, but the effort of carting sand and cement around may seem off-putting until you try it and find out how easy it really is.

SlimFix joisted floor UFH

Floating floor underfloor heating - SlimFix™ panels

Often thought to be the easiest way to incorporate underfloor heating into an existing property, floating floors are a builders dream. Use innovative  SlimFix™ panels from Continental Underfloor, the foil faced bonded distribution means that it provides even heat distribution, and only being 25mm thick means that increase in floor height is minimal.

Our SlimFix™ panel can also be used on joist floors, and is ideal for renovations.

Continental Underfloor makes your retrofit install easy

We hope that this guide makes it easier for you to decide what is the best method to install different underfloor heating systems for your next project. We supply a range of underfloor products that are perfect for new builds and existing properties alike.  We deliver the highest quality underfloor heating solutions to all of our customers. For a quote or more information about what product is the best option for you or your customers, contact us on 0333 800 1750.

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