Full kit
from 649.99 €
For those who prefer a quick and clean installation in dry construction, there is our thin underfloor heating as a dry system.
Our drywall kit with milled gypsum fibre boards with a thickness of 18 mm reduces the effort and time required for the installation of water-based underfloor heating in existing and old buildings compared to the standard method.
The construction can be a single-layer, double-layer or triple-layer system. The single-layer construction requires an already load-bearing, firm and level subfloor. In a two-layer structure, the milled drywall panel is bonded to another layer of dry screed. The thickness of the lower layer depends on the expected load. A three-layer construction with additional insulation between two layers of dry screed has also proven effective when there are special requirements for impact sound insulation and thermal insulation. For more information on the structure, please refer to our installation instructions.
The 10 mm PE-RT heating pipe is flexibly laid at 100 mm distance in the milled grooves of the dry screed panel, which are then sealed with joint filler. The low requirement for filling compound reduces the weight of the underfloor heating system and ensures short drying times. After just one day, work on the new floor can be completed by laying the floor covering.
Like all other FLEXIRO kits, the drywall underfloor heating system connects to the existing heating by an RTL valve is controlled individually. low profile dry system is simple and quick to retrofit and provides comfortable warmth for your home.
NEW Handy panels measuring 1,000 mm × 500 mm, which can be easily laid by one person
Technical data sheet drywall underfloor heating kitHeating capacity and other technical information116 KB
PDF Installation Guide - How to Install Drywall Underfloor Heating KitsComprehensive installation guidelines with all required information for retrofitting a FLEXIRO underfloor heating with ready-to-build dry screed boards.832 KB
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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