Level the scalp stones evenly and durably


Particularly in swimming pool construction, the filling of the formwork is a standard task, so that later waterproof coatings or foils do not apply or tear. Diffusibility and elasticity are particularly important to resist permanent exposure to temperature differences and moisture.

Specific requirements

When formwork stones are filled, a balance must always be found between the work required for large surfaces and long joints and the required result. When later covering the filled surfaces with a foil usually a carefully mixed filler, which is sufficiently leveled with flat iron. Paints require a uniform suction between putty and residual surfaces. Primers can help, but must be supported by the right filler.

It is important to have a vapor-permeable putty compound, as water always causes direct moisture or indirect moisture through condensation and "sweating". In sealing putty the drying ability of the Schalsteine ​​is severely limited. Since water always seeks the path of least resistance, the dried spatula is a preferred "attack surface". The consequence is often a decomposition or a crumbling.

Coherent properties of the stones and the spatula

In most cases, formwork stones consist of concrete blocks. Consequently, cost-effective cement putty is quite suitable, provided that it is mixed in the right proportions and with the appropriate aggregates. Theoretically, the goal in the filled slots is to continue the same material behavior that concrete blocks have.
An indirect indication of suitability is the post-processing properties specified by the manufacturer. Ideally, coincide with the work order
Fill, prime and paint the type of primer and paint. The classification of the concrete from which the switching stones are made, helps in the selection of similar leveling compound.

Drainage also protects the spatula

Since formworks normally receive a watertight and diffusion-sealed lining, keeping the drying time of the spatula is very important. Moisture residues otherwise form a rotting base under the lining. In the dry season of the filler must also external influences are taken into account.

Typical drying inhibitor is the bare soil behind the Schalsteinen. In order to prevent a damaging effect on the putty seals here, a suitable drainage layer must be introduced between soil and Schalsteinaußenflächen.

Tips & Tricks

Try to apply screed stones only in dry weather with expected maximum temperature changes plus / minus five degrees Celsius during the dry season.


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