Manual and important points for attention of the Staenis grid:
Screed

Processing temperature

Only install screed at temperatures between 10°C and 20°C. This ensures that the screed will not silt up or come loose. Also make sure that the screed feels fresh/cold when placed or that the ambient temperature does not fall below 5°C.

Approved floor covering

Tiles (ceramic tiles and natural stone), parquet, floating floor coverings, carpet and all other floor coverings, except cork and cast floors, can be placed directly on the screed (for all types of cork and cast floors, apply a levelling agent first).

If you want a cast floor as a floor finish, you should work with screed and a fiber-reinforced leveling compound of 3 mm thickness on top. Make sure that the fibers in the leveling compound are evenly distributed and lie in all directions. It is also important that the screed can dry out strongly. To do this, pollinate the top layer of the screed well during installation and immediately place a building foil over it for 7 days to prevent silting. Allow the screed to dry for at least 28 days and check the moisture content against the requirements of the cast floor.

primer

Use and always apply a suitable primer to the screed before installing the floor covering.

Point load screed with Staenis grid

• Maximum point load (⌀ 10 cm) of 1 ton (1000 kg) allowed on a screed with a thickness of 6 cm.
• Maximum point load (⌀ 10 cm) of 1.5 tons (1500 kg) allowed on a screed with a thickness of 9 cm. The above screeds (200 kg cement / m³) are both placed on insulation. If the screed is placed on a concrete surface, where it cannot sink, the regulated compressive strengths for screeds according to the standards of Buildwise apply.

expansion joints

• Surface areas without expansion joints may not exceed 200 m².
  For areas larger than 200 m², please contact us.
  ATTENTION: an expansion joint must be placed if the aperture is smaller than 110 cm.
• Construction joints should always be used, as prescribed by the Buildwise.
• Edge insulation (perimeter joints) must still be placed.

Placement Methods

There are 2 different placement methods for installing the grid in your space.

• Row by row: Place a row of Staenis grids - Adjust the Staenis grids to the correct height - Fill the Staenis screed - Flatten it on the top of the grid - Repeat until the entire space is finished.
• Pre-installed: Place all of the Staenis grids in the space - Adjust all of the Staenis grids to the correct height - Fill the Staenis grid with screed - Flatten it on the top of the grid - Check the height of the grid - Repeat until the entire space is finished.

*Fix the grids by placing weight in or on a compartment Click a row of slats from the grid to be able to pass with a barrow. Due to the fixation of the grid, the distance will remain the same after the row of slats click apart.

Placement of the Staenis grid

• Place the grids by clicking slats and legs together.
• Shorten the battens on the wall by sawing or grinding them. The maximum distance from the grid to the wall is 5 cm.
• When connecting to the wall, you can click the legs sideways into the slat to stabilise the grid. A 3rd type of click connection can be seen on both ends of the slat. This allows you to connect two slats with a side leg, by means of a slat. Note that the bar will only click in one direction.
• Use a screwdriver to adjust the Staenis grid up and down by turning the adjusting screw to the left or right.

Substrate

With a resilient insulation surface, place the grid loosely and fill in the middle with a heap of screed, this will push the insulation down. Only then adjust the grid in height. Always check the height of the installed screed after screeding with a rule, long spirit level or laser.

Height adjustment

You can achieve the best possible flatness with a laser that corresponds to a line on a wooden tool / lath or folding rule. If you use a digital receiver, the screed will in any case cause differences in height of a few mm. A digital spirit level is also not recommended. Try to use a digital receiver or spirit level only to set out a number of points, in order to adjust everything in between by means of a vertical adjustment, tensioned rope or aluminium rule.

Accuracy

We ask you to pay close attention to the height adjustment during installation and to regularly check the flatness with a long aluminium rule or laser.

Processing

• The screed may be placed at different times, since the screed is divided by the grids. Always click in the next row of grids in order to prevent the screed from drying out in the click system and this could prevent the click system from working properly.
• The grid must be clicked together over the entire surface area. If this is not possible, an expansion joint must be placed between the 2 surface areas with grids.
• The grid must be placed max. 5 cm from the wall in all places, in order to retain the advantages of the Staenis grid. If this is not done correctly, no guarantee can be offered.

Waiting time

If you are using a traditional sand-cement screed, a minimum of 28 days must be allowed before a floor covering can be placed. This can be lengthened or shortened by using different screeds with different types of floor covering. Always consult the manufacturer of the screed and floor covering. You can start the cladding earlier than 28 days with quick-drying screed or special tile adhesive, but always consult the manufacturer's technical data sheets for the correct installation.

Underfloor heating

Always allow the screed to go through a standard warm-up cycle before tiling. The underfloor heating can be started 7 days after placing the screed. After 28 days, the screed is ready for tiling with any screed thickness. For parquet, a moisture measurement must be made by the parquet installer before starting to lay the parquet.

Dispersion agent

It is not necessary to add a dispersion agent to the screed with underfloor heating, in combination with the Staenis grid. The dispersion agent ensures that less water is needed when preparing and processing the screed. But the difference in heat conduction, with or without dispersion agent, is minimal and not noticeable when the home/floor heating is commissioned. If you nevertheless opt to use a dispersion agent, you can ask the screed silo supplier (De Fauw) to supply this system with it. You can also hire a water pump and tub from Boels. You fill this tub with water and the dispersion agent. Place the water pump in the full tub and pump the water to the screed silo.

You can also fill a water bottle with the dispersant. Make a hole in the cap. When the mixer is running in the silo, invert the bottle so that the dispersant flows into the screed. When the mixer stops, invert the bottle. In this way the dispersion agent mixes with the screed.

Placing screed

• Fill in the Staenis grid with screed and place it just a little higher than the top surface of the grid. Try to lightly push down on the screed with your trowel.
• Take a long screeding iron or aluminium rule and scrape all the excess screed off the grid. The screed is now the same height as the top surface of the grid.
• Sprinkle some screed with your hand on the surface and rub it with a large sanding board. This will fill in all irregularities. Make sure that you do not create a depression or a mound in the compartment and that you always remain flat.
• For extra adhesion and flatness, take the screed back and pile the screed up by holding the screeding iron at a slight angle (tilt by 3 degrees) and rubbing it over the surface.
• Check and correct each square for flatness to avoid cavities in the grid. This is a very important step that must be followed carefully.

*Only press / scrape the screed manually with a screeding iron and compact with a large sanding board. Do not press the screed with your feet. This can cause the grid to be pressed into the underlying insulation, causing height differences.