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Underfloor heating: The milling system

The milling system is the ideal solution for property owners who want to have surface heating installed later and want to avoid an expensive core renovation of the screed. In contrast to other systems, the ducts for the underfloor heating pipes are milled into the existing screed using a floor milling machine. Thanks to milling machines with powerful dust extraction, this is even possible with inhabited properties. After laying the heating pipes, the previously milled channels are immediately closed with a leveling compound or an adhesive. There is no need to replace the screed and the room height also remains unchanged. After the leveling compound or the adhesive has dried, the new floor covering (e.g. tiles, laminate or parquet) can be laid. In this article you can read about the other advantages the milling system offers and how the laying and installation work exactly.

Good to know: The installation of surface heating with a milling system is primarily suitable for existing properties and old buildings, but can of course also be implemented in new buildings. Make an appointment and let us advise you without obligation.

Advantages of the milling system

  • Fast and inexpensive retrofitting: Since the heating elements of the milling system are integrated into the existing screed or concrete floor, installation takes less time than knob or tacker systems.
  • No change in the screed height: Since the pipes for the underfloor heating are milled into the existing floor and only covered with leveling compound or special adhesive, there is practically no change in the screed height.
    – Optimum heat distribution: The heat can spread better thanks to the small overlap of the heating pipes. This has the effect that rooms heat up faster and also helps to save on heating costs.
  • Virtually dust-free installation: A lot of dust is usually thrown up during milling. To prevent this, modern milling machines are equipped with powerful vacuum cleaners that extract the dust on the spot.
  • No influence on the statics: In contrast to other surface heating systems, which have to be laid in wet screed, there is no increase in the surface weight when the heating pipes are milled in afterwards.

Laying and installation of the milling system

Milling the underfloor heating takes relatively little time. If present, the floor covering (e.g. tiles, carpet or laminate) must be completely removed (including any adhesive residue) in the first step. If there are bumps or damage in the ground, these may need to be leveled out before milling. The screed is then carefully cleaned.

If everything is prepared, the milling of the heating circuits can start. An experienced specialist drives the milling machine across the floor slowly and in compliance with the distances previously specified in the laying plan. Meanwhile, an integrated vacuum cleaner ensures that no dust gets into the air and can settle on windows or furniture. Once the heating circuits have been milled, the pipes can be laid and connected to the heating circuit manifold. A pressure test is then carried out to ensure that the underfloor heating is tight and that no water is leaking out. If this is successful, the milled holes can be closed. After drying, the underfloor heating is ready for use and work such as laying the final floor covering can follow.

Arrange a non-binding consultation appointment now

Do you have a property and want to retrofit underfloor heating with as little work and cost as possible? Then surface heating in the milling system may be the best solution for you! As a company with more than 25 years of experience in the professional and reliable laying of screed and underfloor heating, we are happy to assist you with our know-how and accompany you from advice to planning to the professional implementation of your project. It is best to contact us directly via e-mail or telephone and make an appointment for a non-binding consultation.

More information about the costs can be found here: Floor heating mill costs

[ FAQs ]

Questions and answers about the milling system

What types of soil is the milling system suitable for?

In principle, it is possible to subsequently mill underfloor heating into almost any floor. These included mastic asphalt screed (AS), anhydrite screed (AE), cement screed (CT), dry screed and even ceramic or natural stone tiles. Depending on the nature of the soil, however, different methods, tools and machines (dry or wet systems) are used. We would be happy to check the soil conditions of your property. Just contact us and make an appointment.

Are there subsidies for milling in underfloor heating?

Yes, you can apply for low-cost loans or state subsidies from the KfW and BAFA for the subsequent installation of surface heating in the milling system. Information on the exact conditions and the amount of funding can be found on the KfW and BAFA portals. We would be happy to inform you about the possibilities of a subsidy in a non-binding consultation.

What are the requirements for the milling system?

In addition to a soil condition suitable for milling, the screed should have a minimum height of 35 to 40 mm. On request, we will be happy to check whether these requirements apply to your screed. Make an appointment online for a free consultation.