Adhesive Screed | Price, DIY, Advice and Info!

Screed floor structure 11

1 cm to 5 cm - with concrete slab as a base

Adhesive Screed | Price, DIY, Advice and Info!

Information

An adhesive screed is applied to a concrete slab when you want to level out your floor between 1 cm and 5 cm.

An adhesive screed is adhered to the underlying floor slab and is always prepared with a bonding layer or primer coat.

Before starting, the floorboard must be firm and without cracks and the surface must be dry, free of grease and dust.

Benefits

Achieving a perfect end result without any experience
Compartment of the screed = crack-free screed
Screed is much cheaper than leveling compound

Spread screed work over several days (no stress during installation)
Replaces the steel reinforcement mesh = savings of an average of 3 euros/m²
Less weight on the bearing floor due to the low thicknesses

Floor construction manual

1. The concrete surface must be load-bearing, stable, dry, clean and free of dust and contamination. Remove loose parts that impair adhesion. Temporarily switch off any underfloor heating. 2. Place a primer for absorbent surfaces (Primer CodeX FG 300) on the dry concrete surface (for non-absorbent surfaces you should use an adhesion primer). If the surface shows slight moisture problems, you can use an epoxy primer (UZIN PE 460 A/B) as a solution. For damp/polluted substrates, always consult the technical data sheets to avoid subsequent debonding. 3. Place expansion tape or edge insulation along the walls. 4. Once the previous layers have dried out correctly, place the Staenis adhesive screed grid and adjust it to the correct height with a screwdriver. An adhesive screed is placed between 3 cm and 5 cm high/thick as standard, but by using the Staenis adhesive screed grid you can start from 1 cm high/thick. Shorten the set screws with plastic nippers so that they do not protrude above the surface. 5. Prepare a small amount (for 1 to 2 m²) of barbotine/glue slurry/cement paste/scalding layer. This bonding bridge consists of 1 part by volume of Primer CodeX FG 300 and 1 part by volume of pure water, to be mixed in advance, adding a dry mixture of half cement and half coarse Rhine sand until a thick, still liquid, spreadable moist paste is created. 6. Rub the liquid grout onto the surface with a gruel brush. Wet-in-wet you sprinkle the screed on it. In this way, the screed sticks to the concrete surface. Between 1 cm and 3 cm in height/thickness you make the screed slightly moister for extra adhesive power, strength and better placement. 7. Flatten the screed on the top of the Staenis adhesive screed grid. Sprinkle some screed on the surface and polish it with a large sanding board. This ensures that the remaining holes are filled and good bond strength to the tile is guaranteed. 8. Pay close attention: always apply the screed wet-on-wet to the bonding bridge and top up the screed before the bonding bridge has dried out. This prevents detachment and hollow sounds in the screed. 9. For your information: Adhesive screed is applied when the supporting floor itself is stable and shows no cracks. If cracks occur in the bearing floor, there is a good chance that the adhesive screed will also show cracks. This is of course counteracted by the Staenis adhesive screed grid, but can still occur. 10. Tip: Place a foil over the freshly placed screed to prevent it from drying out too quickly and silting up.

Frequently Asked Questions

Side view floor construction

Legend

Concrete
Burn-on layer + possibly epoxy primer against moisture
Staenis adhesive screed grid (thickness from 1 cm to 5 cm)
Apply edge insulation if necessary
Screed with 250 kg/m³ cement
Double bonding with S1 Flex Tile Adhesive
Tile or floating floor covering
Water-resistant, coloured joint mortar
Plinth
flexible silicone

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Filter quantity calculator (estimate)

Filling material Learn more

Screed (250 kg/m³)

Stabilized (150 kg/m³)

Drainage mortar

Non-tilable insulation screed 50 L

Tileable insulation screed 50 L

Cellular Concrete levelling grains

Non-load bearing fillers (+ additional legs)

Leveling compound

Only Staenis grid (without extra legs)

Surface

m²

Thickness

Volume 2.16 m³

Staenis grid 20m² 1

+Staenis grid 10m² 1

+Staenis grid 5m² 0

+Extension legs 0

+Additional legs 0

Amount of screed required (mix yourself)
(2700 kg sand + 540 kg cement)

3240 kg

Amount of screed required from prepared bags
(Add yourself: 270 l water)

130 bags of 25 kg

Amount of screed needed in silo
(Add automatically: 250 l water)

4 tons

Amount of screed required from concrete plant

3510 kg

Cost calculation (optional)

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