Bathroom Underfloor Heating

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    All electric underfloor heating installations must be connected via an RCD (earth leakage trip) protected circuit. All underfloor heating applications in bathrooms, wet rooms and shower rooms must use heating cables or mats with an earth screen to comply with current wiring regulations. All heating cables and mats supplied by Floor Heating Solutions comply fully with these requirements.

    Tiled floor finish on concrete or screed base

    All solid floors whether concrete, screed or asphalt require some form of insulation beneath then or preferably above in the form of an insulated backing board prior to installation of your electric underfloor heating. Heating mats or cables are attached directly to the insulated screed or insulated tile backing board prior to tiling directly over with a flexible floor tile adhesive. Design can vary from 100w/m² to 200w/m² dependent on floor base specification and heating requirements. As a general guide design to 150w/m² using TPM mat kits or loose cable systems.

    Tiled floor finish on to timber / plywood base

    All timber floors whether floor boards, chipboard or plywood must be assessed to confirm structural integrity and suitability for tiling prior to installation of electric underfloor heating. Floor boards will always require provision of insulated tile backing boards or ply-wood overlay before heating can be installed. Mats and cables can be fitted directly on to ply-wood and moisture proof chipboard, providing that the floor is treated with a suitable priming solution. Design will vary from 100w/m² to 150w/m² dependent on floor base specification. If you are unsure of this, please contact us to discuss. Do not exceed 150w/m² if laying heating directly on to plywood or chipboard sub floors.

    As a general rule for both of the above scenarios, under tile cables offer a far more flexible heating solution in terms of area coverage and heat output. Under tile heating mats provide a quick solution for areas of a regular shape.

    Cables / mats with twin conductors are considered easier to install than single wire alternatives as just one end of the heating cables connects to the thermostat. All of our under tile heating systems use a high spec twin wire arrangement.

    Use flexible tile adhesive to embed the heating cables during tiling or alternatively embed the cables in a portable latex screed prior to tiling.

    Underfloor Heating beneath Vinyl.

    Heating beneath Vinyl will require special consideration due to the maximum floor temperature limits permissible and the need to provide a solid surface on which to bond the flooring. The subfloor must be well insulated beneath the screed or by using a reinforced insulated tile backing board such as Marmox. Heating cables (TPP) are then attached to the surface prior to applying two applications of a Latex floor smoothing compound. The first application (4mm) is to embed the heating cables, followed by a second layer (3mm)to put distance between the heating cables and the vinyl to allow heat to dissipate across the floor. Maximum floor temperature not to exceed 28degree C this is easily achieved with a heat output of around 150w/m².

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