In screed underfloor heating.

Before instillation can proceed, the sub floor must first be made suitable for receiving the intended screed flooring and a suitable insulation should be installed such as kingspan to fully insulate the heated floor area.

1: Make sure the floor is level, free of dust and debris & suitable for the desired floor covering. Over un-insulated sub floors it is recommended to first install an additional minimum 10+mm suitable insulation layer, (Ideally 20+mm should be installed).

2: Time should be taken to plan the floor layout, please see the diagram below. The cable length on each system is set and the power output is also set to 17watts per linear meter. To use the heating as a primary heat source it is recommended to install 170w/m2 or more over a minimum of 70% of the floor area. To achieve this the spacing's between wires should be approximately 100mm , (this spacing can be reduced to increase the wattage up to 250w/per m2 if required ).

 

3: Install the supplied fixing bar/spacing strips parallel to each other, across the two narrowest ends of the floor area approximately 10cm in from any wall or fixed/immovable object.

4: Starting at the power/thermostat position role out the cable to the nearest spacing bar. Starting at one end fix the cable to the bar through the clips and proceed to run the cable back and forth between the bars fixing the cable to the bars at approximately 100mm spacing's, Additional tape can used if required to maintain an even spacing between wires. (please note that the cable is a set length and should not be altered. The spacing between wires should be altered instead to make the cable fit).

5: Once installed the cable should be run back around the edge for the room to the start position ready for wiring.

6: If required the fibre tape can be used in place of the fixing bars. Often in small odd shaped areas the tape can offer more flexibility to the installer.

7: Before installation and before any screed is installed the cables should be tested for electrical resistance. If at any point during the installation procedure or floor cover fitting procedure damage is caused to the heating cable the cable should be re-tested and if necessary a repair kit used to repair the cable.

8: A 50 - 75mm screed should now be installed taking care not to displace the heating cables during instillation. (No heating cables must touch or overlap at any point). Once the screed has been installed the floor covering ie tiles can be laid as per the manufactures instructions.

Please feel free to email or phone us Monday - Friday 8am - 5.30pm and Saturday 9am - 1pm if you require assistance.