underfloor heating
U-N-D-E-R-F-L-O-O-R H-E-A-T-I-N-G
You want to have a parquet floor but you do not want to do without an underfloor heating? No problem! As parquet and floor screed have a similar swelling and shrinking behavior when exposed to heat, there are fewer tensions in the glued area than is the case for other flooring types. Parquet flooring has good thermal resistance values, so that the heat can spread evenly (see drawing). Of course some types of wood are more suitable than others for being laid on underfloor heatings. Light-colored types of wood (above all beech and maple wood) react rapidly to climatic changes and they swell and shrink faster than dark wood types. There are also some differences between different parquet types. As they are thinner, two-layer parquet types are generally more suitable than thicker products for being laid on underfloor heating systems. As a general rule, surface temperatures of more than 26 °C should by all means be avoided for physiological and technical reasons.
Heat dissipation of underfloor heatings
The basis on which the parquet is laid should be dry, flat and firm. Before laying the floor, make sure that the basis is clean. Besides, the underfloor should be thoroughly dried out. Ask your heating installer for a heating protocol (in accordance with DIN 4726).
Thermal resistance values
The thermal resistance value specifies the resistance of the flooring to heat dissipation. A rule of thumb for underfloor heatings says: the lower the thermal permeability value, the more heat is transmitted to the room.
| Two-layer-parquet 10mm (Duo-Line, Eco-Line, Top-Line, Loft-Line, Country-Line, Art-Line) |
0,065 m2 K/W |
| Two-layer-parquet 12mm (Duo-Line, Top-Line) |
0,078 m2 K/W |
| Mosaic parquet | 0,038 m2 K/W |
| Classic Design, upright lamellae 10mm | 0,048 m2 K/W |
| strip parquet, upright lamellae 22m | 0,105 m2 K/W |
| 3-layer parquet (Amadeus, Perlis, Karelia) | 0,100 m2 K/W |
