Installation of bonded thin-layer underfloor heating systems for renovations

In renovation projects, the required installation heights are usually not available for the assembly of conventional hot water underfloor heating systems. Here, thin-layer heating systems of well-known manufacturers offer a real alternative. All common floorings can be used on top of the poured mortar over the heating elements. Due to their thin-layer set-up these systems have very short reaction times and can also be operated in the low-temperature range. This saves energy and offers a high level of comfort.

Renovation

Simple & safe to the goal

Check of substrate and preliminary works

1. The substrate must be solid, load-bearing, dry and free of all adhesion-impairing particles. It must be checked according to the different methods (refer to the application tip "Check of the substrate").
2. Deeper irregularities and defective parts are levelled with the non-sag levelling mortar weber.floor 4045. On wooden beams a supplementary levelling layer with the high flow smoothing mortar weber.floor 4031 or the fiber-reinforced smoothing mortar weber.floor 4033 is necessary.
3. Prior to the laying of the heating elements the acrylic bonding primer weber.floor 4716 is applied by using a broom on the existing substrate. As soon as the primer has become dry and transparent, the laying works of the heating elements can begin. Install an insulation foam strip between the floor and all rising building parts.
Installation of heating elements

1. Cut self-bonding heating elements to fit exactly and glue in accordance with the manufacturer’s instructions on the primed substrate. Remove the protective foil of the bonding layer only immediately before glueing.
2. The heating pipes supplied by the system supplier are clicked into the heating elements according to the installation plan and connected to the heating system’s distributor. Afterwards, the leak test can be carried out according to the manufacturer's specifications.
3. Pour on the heating elements either the thin-layer anhydrite screed weber.floor 4190 with a void-free covering of 10 mm over the pipes or the quick-setting floor levelling compound weber.floor 4160 with a void-free covering of 5 mm over the pipes.
4. After a short follow-up time (until the product has flowed through the heating elements), spread and de-aerate the pre-said materials with the flat rake with 2 adjustable pins weber Bodenverlaufsrakel. weber.floor 4190 can also be beaten through and de-aerated with the wobbling bar weber Schwabbelstange.
5. Minimal build-up height with maximal comfort. The system height is approx. 1 cm including the covering over the heating elements. Rapid installation and start-up are the convincing advantages in the renovation. The heating system is covered with weber.floor 4190 can be heated up after only 6 hours.
6. weber.floor and the underfloor heating manufacturer – two partners for planners and building owners. The weber.floor heating protocols are available upon request.