Susceptible to moisture
Floors with underfloor heating are more susceptible to moisture than those without, as the difference in moisture content between the driest and dampest parts of the floor will increase over time. Underfloor heating can cause extensive drying, which makes the wood contract and shrink. In a cold, dry climate, you can expect to see gaps between strips and slightly concave boards from time to time. We recommend Kährs Original 15 mm parquet flooring or Kährs Linnea 7 mm with Woodloc® or Woodloc® 5S joints to achieve the best results.
When laying a floor over underfloor heating loops, the working temperature should be at least 18°C. This is applicable to boards, subfloors and room temperature. The relative humidity (RH) of the air must be between 30 and 60% before, during and after laying the floor. Your wood floor must be laid close to the subfloor and without an air gap, as air gaps can cause the wood to dry out. Cardboard is recommended as intermediate layer.