Terrace with sloping concrete slab

Terrace 10 - Choose a different floor structure

+9 cm - sloping concrete slab - terrace/driveway - with drainage gutter - ceramic tiles, natural stone and clinker bricks

For a high-quality terrace on a sloping concrete slab, we recommend the Staenis grid in combination with drainage mortar.

Terrace with sloping concrete slab

Information

Tension and moisture are the 2 biggest causes of damage to a terrace. This terrace floor construction with drainage mortar allows the moisture to drain off and is tension-free due to the Staenis grid, so that the tiles and grouting remain in top condition.

Benefits

  • Achieving a perfect end result without any experience
  • Replaces a drainage mat = savings of an average of 17 euros/m²
  • Replaces an uncoupling mat + glue = savings of an average of 20 euros/m²
  • Replaces the steel reinforcement mesh = savings of an average of 3 euros/m²
  • No expansion joints needed in the screed = savings of an average of 3 euros/linear metre
  • Floor construction avoids rising damp/capillary effect from the substrate
  • Water/moisture can quickly drain through the drainage mortar
  • No chance of the screed silting
  • Compartment of the screed = crack-free screed
  • No dishing/cupping of the screed = perfectly flat screed
  • Very load-bearing surface due to vibrated layers underneath
  • Spread floor works over several days (no stress during installation)
  • Very good adhesion to the tiles, by applying a fine layer of screed to the drainage mortar. Ideal for gluing tiles or natural stone

Floor construction manual

Side view floor construction

View this floor construction in reality via Sack Zelfbouw

Legend

  1. open ground
  2. Concrete rubble layers vibrated with vibrating plate
  3. Drainage pipe connected to drain
  4. concrete slab
  5. Drainage gutter
  6. Drainage mortar filling layer (fine gravel with cement)
  7. Stainless steel grid (thickness of 7 to 8 cm)
  8. Edge insulation
  9. Drainage mortar (fine grave with cement) + 5 mm screed top layer
  10. Double bonding with S1 flex tile adhesive (S2 not allowed)
  11. Floor tiles
  12. Water-resistant, coloured joint mortar
  13. Silicone
Draining terrace 10

Side view floor construction with screed

Legend

  1. open ground
  2. Concrete rubble layers vibrated with vibrating plate
  3. Drainage pipe connected to drain
  4. concrete slab
  5. Drainage gutter
  6. Draining mat (Schlüter Troba-Plus 8)
  7. Stabilized sand with 150-200 kg/m³ cement
  8. Stainless steel grid (thickness of 7 to 8 cm)
  9. Edge insulation
  10. Screed with 250 kg/m³ cement
  11. Double bonding with S1 flex tile adhesive (S2 not allowed)
  12. Floor tiles
  13. Water-resistant, coloured joint mortar
  14. Silicone
Draining terrace 9

Placement video

Placement of the Staenis grid

Installing drainage mortar for a terrace

We deliver drainage mortar and screed in a silo to your home (only in Belgium)

Screed and drainage mortar in silo delivered to home in Belgium

By simply pressing a button on the silo, you can prepare fresh drainage mortar or sand cement screed at a rate of 3 m³/h and this without time pressure to process the large amount of mortar.

There are 2 separate compartments in the silo. 1 part filled with porphyry (2-6mm) or sand (0/4-0/7mm) and the other part filled with dry cement (250kg/m³). These are only mixed with water when you wish.

The big advantage of this is that you can make fresh drainage mortar or sand cement screed at your own pace and for a few weeks.

We deliver drainage mortar in bags to your home

Drainage mortar delivered to your home in bags

Cem Classic: drainage mortar, now conveniently packed in bags. This can be used/processed in the same way as the drainage mortar from a silo, but with the added advantage that it is three times lighter. This property greatly facilitates processing. Ideal for applying a water-permeable surface for small or difficult-to-reach terraces.

We deliver screed to your home in bags

Screed delivered to your home in bags

Fast: Fast-drying, fiber-reinforced screed with only 2/3 of the weight compared to traditional screed. This makes the work considerably less difficult when you work with bagged material instead of traditional screed. Ideal for applying an adhesive screed screed floor or for small spaces, both indoors and outdoors. This Fast screed is easily spreadable, allowing you to achieve a flat finish more quickly.

Special joint sealant for joints with ceramic tiles

Special joint sealant for expansion and connection joints with ceramic tiles

Because this joint sealant looks just like a cement joint, the product can also be used as a replacement product for conventional joints.

Field of application when grouting 2 cm thick ceramic terrace tiles with 3 mm joint.

This grout is super flexible and sticks enormously to the side of the tile. Also, the grout does not discolor when moistened, which looks aesthetically pleasing.

Buy this tile grout silicone here

Filter quantity calculator (estimate)

mm
2.16 m³
1
1
0
0
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)
135 bags of 16 l
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)

Screed
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