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How to install tiles on a heated floor?

How to install tiles on a heated floor?


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Tiling, the perfect conductor of heat, is one of the coatings best suited to heated floors. Once you've chosen your tiles, it's time to lay! Find more articles on the theme: Quote work for a tiling installation

Your materials

The choice of tiles will be on porcelain stoneware, stretched stoneware or terracotta. You can also choose a paving in limestone, marble, quartzite, shale, reconstituted stone, enamels and glass paste. However, avoid excessive thicknesses of natural stone tiles that generate high thermal inertia and favor materials with a maximum thickness of 20 mm. The type of glue is important because the heated floor causes the tiles to compress, as a result of the expansion and retraction of the support. Choose a special tile adhesive and joint filler capable of resisting deformation. It is a deformable jointing mortar specially designed for substrates liable to deform.

Preparing the screed

Before starting to lay the tiling, plan a coating of the heating system with a screed for underfloor heating, not forgetting the splitting joints. These joints will be necessary on the door sills if the coating extends from one room to another. The screed will comply with CPT 3606 for parquet with electric radiation, with NF DTU 65.14 for heating with hot water and with CPT 3164 for a reversible floor. The screed must dry at least 3 weeks before a first heating which will be done gradually over several days to stop 48 hours before laying the tiles. It is important not to lay a tile on a screed that is too wet. The screed must also be clean and level.

Installation and laying of tiles on the heated floor

1- Proceed to glueing Depending on the size of the tiles and the type of glue, you will prepare the support with a single or a double glue. Consult the user manual which will tell you. The installation of large format tiles (larger than 60X60) will not have the same water absorption constraints. When you buy your bags of glue, remember to check the dosage. 2- Placing the tiles It will be done gently by tapping each tile with a rubber mallet. Use plastic braces for tiling joints that you will place between each tile and which will be used to keep the tiling in place while keeping the same joint width everywhere. Take a more or less wide spider depending on the desired joint width. As an indication, for a traditional terracotta tile a width of 6 mm is recommended. 3- Make your seals. 4- Remove your braces just before the joint coating is completely dry. 5- The restart will take place 2 to 7 days after the installation of the tiling.