Laying tiles over underfloor heating need not be complicated, Kerakoll says, if you use its systems for both electrical and water-based installations. The products are designed to be easy to work with and kind to the health of the installer.
The pipes for water-based systems need to be laid first and then covered with a screed. Keracem Eco is suitable for this, as it’s designed to be used with heat radiant slabs. It’s fast drying, so you can tile on it after 24 hours.
Use a layer of Keratech Eco R30 self-levelling compound over electrical heating systems after priming with Keragrip Eco where necessary. Keratech Eco R30 is described as an eco-friendly product which is easy to lay and can be tiled on after 12 hours.
Once the substrate is dry, you can fix the tiles. For this, the company recommends using its gel adhesives: H40 Gel for standard-set, or H40 Advanced for a rapid-setting adhesive.
The H40 range consists of three formulations (standard setting H40 Gel, rapid setting H40 Advanced and C2 H40 Ultimate) that can be used with any type of tile on any substrate, the company says, owing to the inclusion of new polymers which give them a high shear strength. The adhesives are suitable for use with underfloor heating as they contain additives to increase flexibility. The unbroken structural bond which they form with the substrate and tile is designed to absorb and even out stresses caused by movement of the substrate.
The mix doesn’t shrink due to the inclusion of a geo-binder, Kerakoll says, so you can make it the right thickness for the job, and it is soft and easy to work with. The consistency means the adhesives wet the entire tile as well as the substrate, improving the bond and performance. The products also have a low environmental impact with low CO2 and very low VOC ratings, as well as a large amount of recycled material, the company says.
Finish the installation with Fugabella Color. Safe and easy to work with, this resin-cement hybrid grout does not contain Portland cement, so it does not develop efflorescence. It has the same properties as the H40 gel adhesives, allowing you to mix it to your desired consistency and not drying out in the bucket.
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