Underfloor Heating

Installing Planks &  Parquet Over under-floor heating

Before Installation:

Under floor heating.  It is imperative that the property is dry, warm and ventilated.  Sub-floor, plaster-work and decorations should be thoroughly cured before the timber is delivered.
The sub-floor should be thoroughly dry with 4% moisture content maximum, the temperature ambient should be between 16-23°C and the relative humidity between 50-65%.
The floor should be acclimatised within  the property for 5 days with underfloor heating.

In the case of newly laid screed, this must be allowed to dry naturally without turning on the heating.  Allow 2 weeks drying time for every cm of floor screed.  We would recommend to either use a PVC damp screen if floating or a liquid DPM if sticking down.  This will ensure no moisture is released into the flooring.

The temperature on the underside of the wood should never exceed 27°C.  Exceeding this temperature will cause the boards to lose moisture and could lead to the boards gapping, cracking or de-laminating.  To monitor the temperature a floor probe should be installed below the flooring and wired into the thermostat.  The probe should override the thermostat to ensure the temperature beneath the boards does not exceed 27°.  It should be remembered that it is the humidity that carries the heat.  So the drier the environment the colder the room will feel.  Humidity can be easily introduced and regulated if required  by the use of a small electric  humidifier.

If a glue down method is used a semi flexible adhesive must be used, we can supply Bona R850 or Bona R848.  If a floating method is used a suitable underlay can be used such as Quick-Therm.

Before commencing the installation, reduce the temperature to 17°C and maintain this temperature for a further period of three days after installation.  After this time, the temperature can be increased by 1°C per 24 hour period until a comfortable room temperature level is achieved without  exceeding the 27° limit below the floor.  Please note it is recommend to leave the heating on during the summer months to maintain a stable environment for the flooring.  The temperature need to be adjusted slowly in seasonal change rapid changes for instance on a cold snap can damage the flooring.

Rugs, carpets and mats should not be used as these can greatly increase the surface temperature of wood flooring.

Please note that a constant humidity is essential to the well being of the floor.  Too much moisture in the atmosphere will call the wood to expand and spring.  Not enough will cause the wood to dry out and shrink.  Our wood is stored an a ambient temperature and humidity and your order will be dispatched at between 8-10% moisture content.  If after installation, the timber absorbs or discharges 1% in moisture content across the floor this could result in movement of up to 2.5 mm per square metre area.

Moisture loss is more prevalent in smaller  parquet pieces as opposed to longer length planks. We cannot emphasis enough the important of maintaining stable conditions throughout the lifetime of the floor and  to this end we strongly recommend a Fid Box is installed within the wood flooring. This will monitor and record  the under floor  temperature, the moisture content and humidity of the conditions.