We have been combining wooden floors with underfloor heating for years

With our many years of experience, skill and love for wood you can trust us with installing a wood floor on your underfloor heating. Our wooden floors are always made ​​and installed according to your wishes. We always do an inspection of your home or office and provide you with information, so you can make the best choices for your situation. We have wide range of wooden floors, which can be modified with different colors as you like.

We like to see you in our showroom for an informal and informative talk about combining floor heating with a beautiful wooden floor from Uipkes!

Mill floor heating under your wooden floor

The mill floor is popular. You will find these floors in renovated or serially built homes where heating is not required. Residents usually choose for floor heating at a later point in time. The existing screed may consist of different materials such as cement, tiles or floor screeds. Several slots are milled In the existing screed layer and then underfloor heating tubes are placed in these slots. Next, the slots are sealed with cement or epoxy / PU bound materials. After this we can install the wooden floor.


The advantage of milling is that you do not have to deal with long drying times, in contrast to wet construction. The floors can usually be milled in a day or a few days. In addition, you do not lose any construction height with this underfloor heating system. The pipes are placed in the existing floor on which the wooden floor can be laid.

The dust-free milling machine makes it a “clean” way of working. Milling can be done in many different floor types:

  • sand cement; minimum thickness should be about 3 cm
  • anhydrite; minimum thickness should be approx. 3 cm
  • Estrich floors; such as Knauf Brio, Fermacell (make sure any screws are removed beforehand)
  • Decorative gravel floor
  • Concrete subfloor; please note this often requires a stronger milling machine
  • Existing tile floors; it depends on how firm and firm the tiles are. These may vibrate loose or break when milling. If this is the case, they should be removed and possibly leveled.


Milling is often used in existing homes, which already has a good finishing floor. In addition, milled floor underfloor heating is often used when the floor cannot be raised much due to doors and connections to other floors and the stairs.

How does a milled floor underfloor heating system work?

The screed is subdivided into a number of 'groups' that are required for heating. On average, about 8-10m2 per group is used for heating.

By means of a milling machine, which is low in dust, slots are ground in a so-called volute pattern, whereby a hot water (supply pipe) is placed next to a cold water (return pipe). This creates the optimal distribution of heat. In the case of main heating, the pipes are placed at a distance of approximately 10 cm from each other.

Each “group” (a number of m2 or specific space) is connected to a so-called distribution station, which is connected to one of the control systems. The distribution station ensures the passage of hot water through the pipes in the floor. You can often set the water temperature that goes through the pipes at the distribution station, so that too hot water is never passed through.

The slots are usually milled at 16-20 mm, in which the heating pipes/hoses for the water are laid. After this, the trench must be closed with an epoxy-bonded material if the choice is made for a wooden floor. If the floor needs to be leveled, it is advisable to do this before milling. In contrast to other floor types, the floor often does not need to be leveled before installing a wooden floor.

Combine a milled floor heating system with a wooden floor

A milled floor works well in combination with a wooden floor. Both as main or additional heating. By applying the right floor you will enjoy this for many years. In addition, wood is naturally a "warmer" floor, which gives a pleasant feeling even without the underfloor heating.

Points of Attention

  • Minimum thickness of the screed must be thick enough for the slots
  • Preparing place divider by a plumber
  • Seal the slots with epoxy-bonded material (permanently elastic), not with tile adhesive.
  • Pipes must be completely covered.
  • Removing screws when milling in Estrich floor (Fermacell)
  • With tile floors, these must be well fixed and sturdy, if in doubt about this, then choose to remove the tile floor before milling in underfloor heating.
  • Pipe distance with main heating 10 cm, pipe loops max. 8 m. Length.
  • Provide sufficient insulation under the subfloor to prevent a lot of heat from being lost.


  • Check if the pipes are firmly put in the slots; at least 28mm below the subfloor.
  • Make slots thoroughly dust-free with the help of an industrial vacuum cleaner.
  • Fill the pipes to the top of the subfloor with a filler. Leave to dry for at least 16 hours.
  • Apply primer on the subfloor with the foam roller, lambskin roller or spatula. Use approx. 80-200 g / m². Drying time approximately 1 hour at 20 ° C and max 65% RV. Avoid ponding!
  • Glue the wooden floors. Use approx. 1000 g / m². Apply with toothed B11.

If the subfloor contains an excessive moisture content (> 2.0%)

  • Check that the pipes are firmly in the slots. At least 28 mm below the top of the subfloor.
  • Slots are thoroughly dust-free with the help of an industrial vacuum cleaner.
  • Fill pipes to the top of the deck. Allow to dry for 12 hours. Apply within 24 hours.
  • Apply epoxy primer / moisture screen as a sufficiently covering layer with a coat roller, use approximately 350-400 g / m². Drying time 12-16 hours. Apply the next layer within 24 hours.
  • Glue the wooden floors with about 1000-1200 g / m². Apply with toothed B11.