Level floors quickly

Spread directly on hollow-core slabs, pumped filler also works on large floor surfaces of commercial premises.

In the H.A.B. project being constructed by the central square in Pietarsaari, residences, shops and a car park will be built below the square.

When the pump vehicle of Remontti ja sisustuspalvelu Oy arrives at the worksite on a Monday morning, Pumping Supervisor Ari Salmela promises 1,000 square metres of level floor on the residential floors by Wednesday.

Pumped filler is also suitable for office construction.

“We have reserved 80 tons of filler. Parquet flooring can be installed as soon as the pumped filler is dry, in a couple of weeks,” says Salmela.

The pumped filler spread by the contractor smooths out by itself on top of the hollow-core slabs. It is trouble free and guaranteed to be smooth.

Pumped filler is used widely in residential construction. On large floor surfaces of commercial premises, on the other hand, the method is not used so much yet.

“Many think that it’s expensive to pump the filler directly on top of the hollow-core slab,” says Salmela.

Pumped filler saves time and cuts down on work phases

It is often the fear that long and curved hollow-core slabs increase material consumption. For this reason, a surface concrete slab is usually cast on top of the hollow-core slab.

“According to our calculations, pump levelling is often less expensive on the whole. There are fewer work phases, and it saves time,” says Ari Salmela.

The greatest benefit is the saved time, which gives leeway in construction timetables. A concrete slab cast on top of a hollow-core slab takes around two months to dry. In this drying-out period alone, pump levelling saves six weeks’ time.

“After it is dry, a concrete floor must still be honed and levelled, while a pump-levelled floor is ready for surfacing as soon as it’s dry,” reminds Salmela.

Smooting plaster reduces consumption and improves the result

The floor levelling of the two H.A.B. floors with commercial facilities was done in two phases.

“We did the priming and the base levelling on the same day. The surface levelling was pumped the next day,” says Salmela.

The hollow-core slabs of the large floor surfaces in the commercial facilities were slightly irregular in the middle. Kiilto’s Base filler was pumped in the largest holes. Thanks to this, a smaller amount of Universal levelling filler was needed, and the end result was also better.

Only a single pumping is required!

The residential floors being built right now will be pumped with Kiilto’s fibre-reinforced Base filler. The top of hollow-core slabs is heat insulated, and the floor heating pipes are encapsulated in the layer of filler, under a fibreglass mesh. Only a single pumping is required.

“Using Base results in a good base for parquet flooring. For carpets, I would still add surface levelling,” says Salmela.

The Kiilto products used in the project


  • The floors of the commercial premises were levelled by spreading Kiilto Start Primer on top of the hollow-core slab.
  • Base levelling was done on top of this on the same day, using Kiilto Plan Base.
  • The next day, Kiilto Plan Universal filler was pumped into the floor. Surfacing followed after it has dried out in approximately two weeks.


  • The floors of the residences on the higher floors were prepared for surfacing with pumped Kiilto Plan Base.
  • The fibre-reinforced filler is suitable for concrete surfaces of different kinds, sites with floor heating and pump filler floors resting on the ground.
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