Installing a heating mat for underfloor heating is a way to ensure thermal comfort and freedom in interior design. With the help of this practical manual, you will learn how to install heating mats yourself, eliminating the need to engage a specialist.
Underfloor heating with a heating mat is an electric heating system that focuses on heating cables placed on a fiberglass mesh. These mats can be installed directly under the floor, ensuring even heat distribution over the entire surface.
Installing the heating mat is relatively simple, thanks to the self-adhesive surface of the fiberglass mesh. It can be laid on a concrete screed or on thermal insulation made of XPS boards , which are covered with glue. It is worth choosing a flexible adhesive that does not crumble or peel off as a result of thermal movements.
The underfloor heating system is controlled by an electronic thermostat , which controls both the air temperature in the room and the floor temperature.
Before you begin installation, plan carefully, identifying the areas where you will install the mats and measure the area to adjust the number of mats. Also prepare the subfloor by removing the old flooring and ensuring it is clean and even. In the case of a concrete floor, it is necessary to level it.
Then prepare the necessary materials and tools, including a heating mat, glue, thermostat, cables and tools.
Start assembly by placing the mat on the floor and adjusting it to the shape of the room. If necessary, you can cut the mesh to adapt the mat to the surface. Remember to handle heating cables carefully. After laying the mat, cover it with a layer of glue or self-leveling screed.
Then proceed to connect and test the system. Insert the external sensor into the protective tube and connect the heating cables to the thermostat. Select the appropriate thermostat and make sure the connection complies with the manufacturer's instructions. Conduct tests to verify that the system is working properly.
It is also worth choosing the right adhesive for ceramic tiles with underfloor heating. The adhesive should be flexible to avoid crumbling and peeling of the tiles as a result of thermal movements. C2S1 class cement adhesive is suitable, and its thickness and method of application are important.
To sum up, installing a heating mat for underfloor heating is a task doable for a person with minimal manual skills, but the electrical connection should be performed by an authorized specialist.
A few more answers to common questions:
Does the power of 150 W/m2 result in higher operating costs?
The higher the rated power, the shorter the time to reach the set floor temperature.
Is it possible to cut or shorten the mat?
The heating mat must not be shortened (cutting the heating cable is prohibited). The heating cable is attached to a grid that can be cut, thanks to which we can adjust the mat to the dimensions of the room.
Can heating cables overlap?
It is forbidden to overlap or cross the heating mat. In any case, the distance between the cables must be at least 8 cm.
Can the mat be installed under a bathtub/shower tray?
It is prohibited to install heating mats under bathtub/shower trays.
Can the mat be installed only by a specialist?
No, special care must be taken during installation to avoid damaging the heating cable.
Does the mat need to be connected by an electrician?
The heating mat must be connected by an electrician with valid qualifications.
Can I install a heating mat under a fixed element?
No, heating mats cannot be installed under fixed fittings or under furniture without legs. The furniture must have legs that are at least 3 cm high.
Can I install a heating mat under floor panels?
No, heating foils are installed under the panels.
What glue should I use to install ceramics?
Flexible underfloor heating adhesive is required to attach ceramics.
What joints should be used for ceramics?
Use a flexible joint for grouting.
How to check the correct operation of the heating mat after installation?
The heating cable resistance and insulation resistance should be measured.
What to do if the heating mat is damaged during installation? (you can buy the repair kit here)
The electrician who installed the heating must check the cause of the malfunction. It may be a thermostat failure, damage to the power cables or damage to the heating mat.