How It Works: Laying Low Profile Underfloor Heating

Installation guidelines

To demonstrate the ease of installation, we have carried out a demo installation of the underfloor heating with clip-on rails and documented it with pictures in these instructions. Detailed installation instructions can be downloaded at the bottom of the page and are included with each heating kit.

The FLEXIRO low-profile underfloor heating is a system kit that has been put together for easy retrofitting of the existing heating system and subsequent installation in individual rooms such as bathrooms or kitchens. Compared to conventional underfloor heating systems, the use of the thin and flexible 10 mm plastic composite pipe ensures a low installation height, even heat distribution and maximum flexibility in planning.

The retrofit installation of the underfloor heating is simplified by the use of plug-in connections and RTL boxes for control and connection to the heating system, making FLEXIRO equally suitable for DIY enthusiasts.

Underfloor heating version with clip rails

Planning of the installation
Installation
Checking the installation
Completion of the underfloor heating system

To conclude

Despite the simple design of the underfloor heating system and the ease of installation, we must point out that, as the manufacturer, we can only guarantee correct delivery from the factory and not installation and connection by third parties. Please also observe the current standards and regulations for heating systems.

The most important installation steps are also shown in our animated video.

FLEXIRO wishes you a successful installation!

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The existing substrate must always be level, clean, dry and load-bearing.

Once this requirement has been met, FLEXIRO underfloor heating can also be laid on OSB boards. However, according to the specifications of one of the leading manufacturers of construction adhesives, Bostik GmbH, the OSB boards must be connected to the subsurface. Floating boards are not suitable. The OSB boards must be primed before laying the FLEXIRO underfloor heating. In this case, the heating pipes should be covered with screed by at least 5 mm.

In many cases, low profile underfloor heating can be installed directly on top of the existing floor covering. Modernising an already insulated floor with this type of underfloor heating therefore usually requires no additional insulation. For this reason, the FLEXIRO Shop only sells special insulation boards for damp rooms. Any additional floor insulation required can be purchased from specialist builders' merchants. Once the insulation has been applied, a load-bearing surface must be created before the low profile underfloor heating can be laid.

This is possible, but floating wooden structures are still out of the question as they are very vulnerable to deformation. Installation is therefore only possible on connected wooden structures which must be decoupled. If you have any questions about laying underfloor heating on wooden floorboards in a specific case, please contact our technical support team.