Full kit
from 599.99 €
Robustness, good heat storage properties and simple, clean handling with low layer thickness – these are the hallmarks of our OSB underfloor heating set. With OSB boards, we have chosen a versatile material that is already frequently used in the construction and renovation of living spaces.
For the robust OSB set, we have chosen a handy panel size of 1,200 × 600 mm, which has already proven itself in drywall ceiling heating. Thanks to the virtually tool-free installation with plug-in connectors, short drying times for the construction chemicals and connection to conventional heating systems with RTL technology, you can create additional heating comfort for your home in just a few steps.
Depending on the condition of the existing floor and the required load-bearing capacity, as well as the sound and fire protection requirements, the OSB underfloor heating system can be installed as either a single-layer or a multi-layer system. The milled OSB panel with 100 mm milling circles allows for highly flexible and customisable heating pipe installations and small installation distances.
Due to the milling structure of OSB boards, this type of thin-layer underfloor heating requires very little filling compound. Only the milled grooves need to be filled, which not only reduces the cost of construction chemicals but also significantly shortens the drying time. The final floor covering can usually be laid the very next day, and the new underfloor heating system can be put into operation once the surface has been completed.
Technical data for OSB underfloor heating kitHeating capacity and other technical information193 KB
PDF installation instructions – OSB underfloor heatingInstructions with all the necessary information for retrofitting a FLEXIRO underfloor heating system with milled OSB boards.2 MB
For structural calculations in the run-up to a house modernisation, it is sometimes necessary to know how much weight the underfloor heating will put on a floor. Of course, the weight depends on the individual floor structure and the materials used. Nevertheless, the weight of the FLEXIRO components can be calculated. The majority of the additional weight is attributable to the levelling compound. The specific weight of a levelling compound is typically between 1.6 and 1.8 kg/m² per 1 mm layer thickness. With a construction height of 17 mm, an estimated weight of approx. 26 kg/m² can be expected. The underfloor heating itself adds only approx. 1.9–2.2 kg/m², even when filled with water. Therefore, the thin-layer system is much lighter than a standard underfloor heating system where the heating screed must be included in the calculation.
The minimum coverage for the heating pipes is 3 mm. However, the required layer thickness depends on the flooring material selected. The minimum layer thickness is only recommended for tiles and ceramic materials. Other flooring materials require an additional 5 mm of coverage. The levelling compound must be flexible and bear the manufacturer's mark indicating suitability for thin-layer underfloor heating. To ensure optimum heating and cooling performance, apply the levelling compound as thinly as possible. Further information on the thermal resistance of standard floor coverings can be found in our underfloor heating data sheet.
Definitely not. The FLEXIRO underfloor heating system is designed precisely for this application. The diffusion-tight 10 mm PE-RT heating pipe minimises the risk of corrosion in the existing heating system. The RTL control boxes prevent high hot water temperatures, which can be a problem for the underfloor heating circuits, by limiting the return temperature. Radiators and underfloor heating can be safely combined in mixed operation with this technology.
We provide answers to the most important questions about insulating a low profile heating system.
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