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Nexclay is the ideal solution for a light filler with good mechanical, thermal and acoustic behaviour. In order to enhance the insulating characteristics, it must be used loose, watered superficially with watered-down cement. It is important to use a blanket of resistant material in the separation between the fluctuating flooring and the slab.

1 – Filled and leveled with dry Nexclay expanded clay.

2 – Superficial irrigation with watered down cement. Consumption for 10 m²: 40 kg of cement with about 25 liters of water. Use low rotation mechanical mixer. The consistency must be adequate to allow irrigation.

3 – After 24 hours, the floor is prepared for the placement of the final flooring.

  • Lightness, substantially reduces the weight in the structure
  • Thermal and acoustic improvement
  • Fire resistance
  • Ease of application
  • Fast dry
Plain voided slabRw = 45 dBLn, w = 95 dB
With Nexclay floating screedRw = 56 dBLn, w = 57 dB


Nexclay expanded clay can also be used previously mixed with water and cement in a concrete mixer. To facilitate the mixing process, first add a part of the water to the Nexclay, then the cement and then the remaining water.

Example: Put 2 bags of Nexclay in a concrete mixer with 5 liters of water and mix for a few minutes. Collect 10 kg of cement and gradually add the remaining water (approximately 5 litres).

In larger works

This system is characterized by the easy execution of fillings in light pumped concrete. The pumping to the application site is carried out by a tanker truck equipped with a pumping system, during the application the binder is added. The leveling is carried out with a roller and an aluminum rule for a better regularization.

The Nexclay is pumped directly to the application site from the tanker.

At the same time, the binder is mixed and pumped through a suitable machine, mixing at the outlet of the hose, in its own device.

The lightweight concrete must be regularized and leveled in the usual way. It is advisable to wait 24 to 48 hours before placing the remaining materials (flooring or others).

In attics - How to improve the thermal insulation of the last slab?

In the construction or rehabilitation of a building, a quick, efficient and economical way to achieve good thermal insulation of the last slab is with the application of Nexclay expanded clay. This 100% natural product does not overload the structure, helps regulate humidity and improves the thermal and acoustic efficiency of buildings, which allows a reduction in energy consumption.

Nexclay expanded clay can be applied loose or in bags.

To apply it loose, it is only necessary to spread it evenly over the surface.

For application in bags, the entire surface must be covered with Nexclay bags and positioned well together. In the end, you have to fill in the empty spaces with loose Nexclay.

If you intend to use this space regularly, you can place plates or another type of support directly on the Nexclay expanded clay.

Did you know that you can use Nexclay expanded clay directly on ground floors?

The drainage and insulation properties of Nexclay expanded clay allow it to be applied directly in contact with the ground. It enables good thermal insulation and promotes the reduction of condensation and humidity in buildings.

To reduce heat loss to the ground, the thickness of the Nexclay should be doubled near the perimeter walls.

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