How To Install Underfloor Heating

Water Underfloor Heating Installation Methods

Installation on Steel Mesh

For installation on a steel mesh system, the underfloor heating pipes are fixed via a tie wrap system onto the smooth steel grid mesh.  Depending on the desired pipe spacing, you would choose the mesh size to suit e.g. 10cm x 10cm (100mm pipe spacing) or 15cm x 15cm (150mm pipe spacing).  This way of installation can be applied to already insulated floors, or in situations in which the height is limited, allowing for further strengthening of the screed, where height is an issue.

Installation of Tacker

For installation using tacker, the heating pipes are attached to insulation using plastic tacker clips of 40mm or 60mm.  This is the cheapest solution to install.

Place the pipes onto a suitable foil backed insulation, such as Kingspan or Celotex, or using a reflection foil insulation system, and place the tackers at a 30mm spacing along the pipe, securing using a Tacker gun or pushing them in with your hands.  We would not advise hammering these clips into the insulation in case you damage the pipe.

Installation on Castellated Plates

For installation using castellated Plates, the heating tubes are pressed into a preset plastic grid egg box style crate.  The Castellated Plates are laid over the whole floor construction and are fixed together which allows fast and secure fixing of the pipes.  Floor Heating Direct also offer castellated Plates with Insulation under the crates allowing for better performance.

Installation using Pipe Fixing rails or Hammer Clips

Similar to the Tacker clips, fixing rails and Hammer clips are a quick, easy and a cheaper solution for securing the Water Underfloor Heating Pipes to the subfloor.  Both systems can be installed directly to a suitable Insulation or onto a Concrete subfloor.  When fixing onto a Concrete subfloor, predrilled holes into the Concrete will allow for the secure fixing of the Pipe Fixing rails; the pipes can then be attached and pushed into position.  The Plastic Hammer clips fix easily over the pipes securing the pipes to the subfloor.

Dry Floor Installation

A unique and low height fixing system, if and where you do not have the depth available, the dry floor system is a simple solution.  The system comes in 2 x different depths, 25mm & 15mm, and is easily fitted using the pre-set grooves on the floor plates and diffuser plates; Laminate or Engineered wood flooring can be placed directly over the top.  Suitable for all building types and suspended floors, by the flooring manufacturers recommendations.


Electric Underfloor Heating Installation methods

The Touch Under Floor heating Mat consists of a heating cable of 11.5 Watts per meter Linear that is equally distributed and connected to a glass fibre net with an interloop distance of approximately 7cm. The mat is fully earthed. Check beforehand if the heating mat is the right size for the floor area to be heated and that there is sufficient electrical capacity (Amps.) available. The Mat may not be positioned over expansion joints. Each Mat is tested at the factory and has a unique inspection card. Every Mat is checked at 4000 volts. Before installing the Mat, the resistance reading should be taken and noted down on the inspection card and page 8 (Note 8). The reading should be taken during the installation and on completion. These readings should be as per the technical information (see note 2). Take measurements both between the resistance wires and between the resistance wire and the earth shield. This mat may only be installed in combination with the following types of thermostats: Touch underfloor Heating MXC Thermostat or Touch Underfloor Heating  WiFi thermostat The red heating cable, attached to the white adhesive glass fibre net, CANNOT be cut. The Mats CANNOT be laid over each other, and the heating cables may NEVER cross each other! The cable junction (SPLICE), the transition of the resistance cable (heating section of the Mat) to the power cable (cold connection) is just within the mat and is marked with a black shrink tube (Splice). This splice MUST be covered with the Tile Adhesive or Self Levelling Compound.

A distance from the wall of 10 to 20 cm should generally be adhered to. The Mat may never be installed under fixed objects like wall units, kitchen units, baths, or showersand must be able to give off its heat unimpeded. The Mat may only be incorporated into the free floor areas. As bathrooms consistmostly of a small free floor area, the Mat can only be installed as supplementary heating. Please contact the Support Line for information about use as main heating.

All installations must be wired through a suitably rated MCB or RCD when applicable. TheRCD has a rated residual operating current not exceeding 30 mA. All installations in wet areas must be wired through a dedicated RCCD in line with the thermostat. All connections must be made by an approved electrician by current IEE regulations. The mat is 3 to 4 mm thick and must be covered by a 2 part flexible adhesive or self-leveller compatible that is compatible with underfloor heating systems. Check the adhesive manufacturer's data.

The Mat has one connecting cable 4 meters in length (Twin Conductor) and has an end seal (loop) at the end of the Mat. The end seal CANNOT be broken and must be covered with the Tile Adhesive or Self Levelling Compound. The connector cable cannot be shortened by more than 2 meters; there must therefore always be at least 2 meters of connecting wire left. The power supply must never be connected during installation. If multiple mats are installed in a space, they must be wired in parallel, and a suitably rated junction box may be incorporated so that only one power cable runs to the thermostat. Maximum capacity of the thermostat is 16 Amps. If combined area exceeds23m², a Contactor will have to be fitted.

The thermostat may only be installed by a qualified electrician. The sensor must be installed in the middle of a cable loop for optimal temperature registration. Ensure that the sensor is installed well clear (min. 50 cm) of radiators and hidden hot water pipes, drains and electrical wiring. The sensor must always remain IN the sensor conduit. Fit cap to the end of the sensor conduit.If the sensor ever needs to be replaced, it can then easily be removed. The minimal thickness of covering materials on the Mat is 5mm. Avoid damaging during installation, such as dropping sharp objects or stepping on the Mat, or careless pouring of concrete. The Mat has to be separated from other heat sources such as luminaires and chimneys. Do not install the Mat under 5oC. The check-control card must be filled in and must contain a schedule or picture of the installation. Keep this check control card in the meter cupboard in a visible place!

The Mat is primarily designed for installation on concrete floors. If laying Mat on a wooden floor, all floors must be sheeted with

our Thermal Board kit or similar cement covered board which is compatible with heated floor systems or sheet the floor with 15mm WBP marine plywood, fix with screws AT 200MM CENTRES, AND THEN PRIME THE FLOOR USING A SUITABLE FLOOR PRIMER AND ALLOW TO DRY, THEN PROCEED ASPER INSTALLATION N INSTRUCTIONS.
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