For rooms with tile or stone flooring, underfloor heating can be installed using mats or loose cable. Underfloor heating works particularly well with ceramic tile or stone, as these materials conduct and retain heat better than wood, fabric, resin or vinyl.
150w and 200w Heating Mats
Underfloor heating mats are thin, durable, insulated mats which have heating cable looped through them. They are rectangular in shape, and can be easily laid down side-by-side to fill a large room. This kind of underfloor heating is best suited to a large room with a regular shape. For areas with high heat loss, 200w mats are best, as these heat up quicker than 150w mats.
When installing these mats, you want to make sure that the room you are heating has a clean, solid sub-floor made from concrete or wood. It’s also strongly recommended that you lay insulation down on your sub-floor, particularly if it is concrete. This will stop the heat generated by your heating mat from seeping downwards and being lost.
Before laying your heating mat, you should check that it is the correct size for the room. You should also test the continuity and resistance to ensure it is working correctly. If you lay your mat and it doesn't work or is the wrong size, you may be unable to return it.
You should start laying your mat closest to where your thermostat will sit. The back of the mat is adhesive, allowing you to stick it down to the floor as you go. You can also turn the mat in any direction, simply by cutting through the mesh or removing the cable from the mat entirely. Please be aware that you should never cut through the heating cable. You shouldn’t let any loose cable overlap, or sit too close to other loops, as this can lead to overheating.
When you have finished laying your mat, test the continuity and resistance again and attach it to the thermostat. You can then tile directly onto it, making sure that you use enough adhesive to create a tight seal and level finish. A leveling compound can also be used to protect the heating cable and prevent any gaps between the tiles and the floor.
Loose heating cable works in the same way as heating mats. Tons of Tiles stocks heating cable that works out to a wattage of 150w/square metre (equivalent to the 150w heating mat). Loose underfloor heating cable is best suited to smaller rooms, particularly if they are an irregular shape.
As with heating mats, you should start your installation by making sure that your sub-floor is clean, solid and well insulated. Test the cable for continuity and resistance, and then begin laying it.
You can work out how to space the loops of your heating cable by dividing 1000 by the length (in metres) of the heating cable, and then multiplying this number by the area you are heating in metres squared. If the cable were 50m long and the room three metres squared, this number would be 60. This indicates that the cable loops should be 60mm apart. To make things easier, you can mark where the cable should lie before you put it down. Bear in mind that if you place the loops too close to one another or let them overlap, they can overheat.
You should never cut your heating cable, so if it's the wrong size you should return it before you start the installation. You may not be able to return it if you have already begun to lay it down. After you have laid your cable you can tile over the top of it, making sure that you use a leveling compound and/or sufficient tile adhesive to achieve a flat, secure finish.
Whether you are using mat or cable, you should wait until the tile adhesive is sufficiently dry before turning your underfloor heating on. Turning on your heating too early can cause the adhesive to dry out and become brittle.
For more detailed instructions, follow the guide provided with your heating mat or cable, or enlist the help of a professional.
All our underfloor heating products come with free delivery regardless of the size of the order. When you place your order before midday you will get free next working day delivery. After this time you will receive order within 1-2 working days.
If your order is of a considerable size and cannot be sent by courier we will ship it to you via our standard pallet service.