Complete Guide to Floor Construction with XPS, Fermacell and Underfloor Heating

Learn how to realize a floor construction with XPS 300, Fermacell plates, underfloor heating, leveling compound and PVC floor. Tips for dealing with height differences and placement.

What is the best way to realize a floor construction with XPS 300 plates, Fermacell plates, underfloor heating, leveling compound and PVC floor, taking into account height differences in the concrete supporting floor and the need to place the Fermacell floor flat and straight on the XPS plate?

A possible solution for your situation is to first level the concrete supporting floor with dry leveling granules or dry sand. You can smooth this out nicely little by little and then place the XPS 300 plates on it. In places with a height difference of 1 to 3 cm, you can use the Staenis leveling grid as height guides to make it easier to work flat with the sand or leveling granules. Please note that the leveling grid is not made to bear weight, but only as height guides. After placing the XPS plates, you can place the Fermacell plates directly on the XPS plates. You can then mill the underfloor heating into the Fermacell plates, after which you apply the leveling compound and finally install the PVC floor. Be sure to do a test to ensure that everything works properly and do not hesitate to seek further advice from the relevant suppliers of the materials, such as Uniwarm for the underfloor heating.

Can Fermacell plates be placed directly on XPS plates as a floor structure?

Yes, Fermacell plates can be placed directly on XPS plates as a floor structure. XPS plates provide compressive strength and insulation, while Fermacell plates provide a stable and flat surface for finishing the floor. It is important to ensure that the XPS slabs are properly leveled and that the Fermacell slabs are installed correctly to ensure a good floor structure.

What is the purpose of the Staenis equalization grid?

The Staenis leveling grid is also designed to serve as height guides when leveling a floor with dry leveling granules or dry sand. The grid helps to create a flat and stable surface for the installation of insulation boards, such as XPS boards. It is important to note that the leveling grid is not intended to bear weight, but only acts as height guides.

Thank you for reading this information. We hope it was useful to you. If you have more questions or if you need help calculating the necessary materials for your floor construction, you can use our calculator.