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Drywall Underfloor Heating Retrofit Kit
Minimal installation effort with pre-milled dry screed panels
For those who prefer a quick and clean installation in dry construction, there is our thin underfloor heating as a dry system. This kit of pre-milled dry screed panels [gypsum fibre] in a thickness of 18 mm further reduces the installation effort when retrofitting underfloor heating in existing and old buildings compared to the wet system.
It is installed as a two-layer system in which the milled gypsum fibreboards are bonded to a layer of dry screed underneath. Alternatively, Alternatively, it can be installed directly onto the existing floor. However, the substrate must be stable, load bearing and level. A non-milled board is supplied to lay out the edges. The 10 mm PE-RT heating pipe can be laid at 100 mm spacing in the milled recesses in the gypsum fibreboard. Thanks to the thin application of the levelling compound, the actual floor covering can be laid after a drying time of just 24 hours and the work on the new floor can be completed.
Like all other FLEXIRO kits, the drywall underfloor heating is connected to the existing heating system via an RTL valve and controlled individually. Quick and easy retrofitted heating comfort for your home in drywall construction.
O.FR.TB.10
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Technical data sheet drywall underfloor heating kitHeating capacity and other technical information116 KB
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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
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The existing subfloor 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.
This is generally possible, but care must be taken to ensure the subfloor is stable, level and dry. Any loose wooden planks should be screwed down beforehand. The subfloor must not give way or spring. When using dry screed boards, two bonded layers should be used. The board manufacturer's additional instructions must be observed. Floating wooden constructions are not suitable as a substrate because they are highly vulnerable to deformation. Therefore, underfloor heating can only be installed on connected wooden structures that are decoupled. Our support team will be happy to provide additional advice on installing thin-layer systems on floorboards.
Due to the installation as low profile underfloor heating directly under the surface, additional thermal insulation underneath the heating pipes can be avoided in many cases. This keeps the installation height low. Exceptions are floors above unheated cellar rooms or directly above the ground. The requirements of the Energy Saving Ordinance must be observed. Detailed information on thermal insulation.
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Does low profile underfloor heating require thermal insulation?
- In which cases is thermal insulation required
- Why low profile underfloor heating usually does not require insulation
- Which insulation boards we recommend
We provide answers to the most important questions about insulating a low profile heating system.