Screed for Underfloor Heating

Liquid flowing screeds are frequently used when installing onto underfloor heating systems.

Some of the advantages of using a flowing liquid screed over underfloor heating are:

Higher thermal transfer of heat, up to 2.5W.

this is achieved because the liquid screeds wrap around the underfloor heating pipes and therefore more surface area is in contact with the screed.

Lower depths, liquid flowing screeds are usually installed at 50mm onto under floor heating and therefore have a quicker response time when compared with 75mm sand and cement screeds.

Liquid flowing screeds are pumped into the property so there is less risk of damaging under floor heating pipe work which could happen if wheelbarrows are being used to deliver sand and cement screeds.

If the building is maintained at 20 Degrees C based on 50mm depth the floor will reach 60% RH at 28 days. We do supply and install faster drying screeds if speed is of the essence.

We design and supply under floor heating systems our systems can be viewed at

      • Foot traffic: 48 hours
      • Loading: 7 days

Commissioning of under floor heating can we done after 7 days and can be used to speed up the drying process.

Commissioning Underfloor Heating

Switch on the heating system to run at a flow temperature of 25°C, or the minimum allowable by the system, and leave for three days 

Increase the flow temperature in 5°C increments per day up to a maximum of 55°C. Leave at this temperature for a minimum of 3 days (typically 7 days if force drying)

Reduce the flow temperature by 5°C per day down to 25°C before switching off and allowing to cool (typically for 48hours) prior to moisture testing

Midland Flooring can supply and install the insulation, underfloor heating and the liquid flowing screed.