August 8 2022

Levelling Slate

Unlike sand, our proprietary levelling compounds mechanically bind together without the need for additional bonding agents. Although very common in Germany, where they were first introduced decades ago, they are less common in the UK. Jupiter introduced dry levelling compounds to the UK over 10 years ago and have always supplied the natural slate version due to its very high compressive strength.

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Perfect For Retrofit

With a density of only 560 kg / m³, a coverage of 10 mm of our floor levelling slate only imposes a load of 5.6 kg / m². The benefits of a lightweight levelling system can not be overstated in retrofit where floor loads are critical.

Our dry-installed slate will not introduce damaging moisture and, unlike a liquid levelling screed, is entirely reversible; therefore a far more appropriate solution for use within historic buildings.

When sloping floors are required, such as in certain church floor constructions or wet rooms, falls can be created with the slate compound.

Datasheet

Installation Guide

Case Study

Levelling Slate:

Datasheet

Download PDF

Product Specification:

Density:

570

kg / m³

Strength:

6.6

N / mm²

Delivery Format:

Grain Size:

2 – 4

Fire Classification:

Thermal Conductivity (λ-value):

0.16

W / mK

Average Chemical Composition of Clay Slate:

SiO₂:

59.0

% Mass

Na₂O:

1.2

% Mass

Al₂O₃:

21.2

% Mass

TiO₂:

1.0

% Mass

Fe₂O₃:

7.5

% Mass

CaO:

0.3

% Mass

K₂O:

3.4

% Mass**

MgO:

1.4

% Mass

* to EN 13501: 2007

** loss on ignition 4.8%.

Product Benefits:

The JUPITER dry levelling compound is suitable for levelling uneven substrates from between 10 and 60 mm, and filling voids up to 150 mm deep.
Our unique, dry-installed floor levelling compound provides a rapid floor levelling solution that introduces no moisture to the build process.
The slate compound undergoes a kiln drying process that renders it thermally inert and which imparts a tight honeycomb structure to the slate.
It is this special structure which means that JUPITER’s slate levelling compound mechanically binds under load and, unlike sand blinding, will not dissipate through repeat pumping action as the floor is walked on.

Manufacturing Process:

The clay slate is rough-crushed, sieved and subsequently broken by means of various crushers down to the initial grain size of 10 to 80 mm. The grain is stored as feeding material in silos. From here it is delivered to the rotary drum furnace by means of conveyors. Inside the rotary drum furnace, the clay slate is heated up using a carbon powder flame to approximately 1,200° C until plasticity is achieved. The heating of the organic clay slate forces it to release gasses and separates oxygen from the natural ferric oxide contained in the clay slate.

The resulting swollen grains have now taken on a honeycombed cellular structure full of tiny air pockets. The swollen slate is cooled down in a cooling drum. The slate is then fed via conveyor belts to two roller crushers which reduce the grain size further, before it is sorted by size by a series of shaking screens.

Product Specification:

Density:

570 kg / m³

Strength:

6.6 N / mm²

Delivery Format:

50 L

Grain Size:

2 – 4 mm

Fire Classification

A1 *

Thermal Conductivity (λ-value):

1.03 W / mK

Average Chemical Composition of Clay Slate:

SiO₂:

59.0 % Mass

Na₂O:

1.2 % Mass

Al₂O₃:

21.2 % Mass

TiO₂:

1.0 % Mass

Fe₂O₃:

7.5 % Mass

CaO:

0.3 % Mass

K₂O:

3.4 % Mass **

MgO:

1.4 % Mass

* to EN 13501: 2007

** loss on ignition 4.8%.

Product Benefits:

The JUPITER dry levelling compound is suitable for levelling uneven substrates from between 10 and 60 mm, and filling voids up to 150 mm deep.
Our unique, dry-installed floor levelling compound provides a rapid floor levelling solution that introduces no moisture to the build process.
The slate compound undergoes a kiln drying process that renders it thermally inert and which imparts a tight honeycomb structure to the slate.
It is this special structure which means that JUPITER’s slate levelling compound mechanically binds under load and, unlike sand blinding, will not dissipate through repeat pumping action as the floor is walked on.

Manufacturing Process:

Levelling Slate:

Installation Guide

Download PDF

01
Establish a reference datum and the required height of levelling compound.

02
Distribute levelling compound to the average height required and in lines to suit the width of the levelling guides.

03
Smooth the slate in the corners and in the parallel strips to the desired height using a smooth-edged trowel.

04
The parallel levelling guides can now be installed on top of the strips of slate, ensuring that they are level. The guides depicted feature an integral spirit level that simplifies this.

05
Fill in the area between the parallel guides with further granules and then place the levelling rule on the parallel guides.

06
Draw surplus slate granules into the empty area using the levelling rule.

07
In larger rooms, installation is simplified by the use of further parallel guides.

08
After the levelling guides have been removed, ensure that the slate that formed their base is made level with the rest of the floor.

09
Insulation panels should be used to walk on the levelling compound. The granules will not be displaced from their level when observing this. Once a uniform load is applied to the slate, it will mechanically bind together.

Levelling Slate:

Case Study

Download PDF