Washed concrete slabs are easy to lay

Sheets of washed concrete were popular in the 1960s and 1970s not only for their durability and appearance. The simplicity of laying made them a favorite flooring on terraces and in the garden. After a few decades of stepmotherly existence, they have experienced an upswing in recent years.

Frugal floor plates

The laying of washed concrete slabs is a manageable handicraft challenge. The frugal plates are easy to move, place, grout and bring to a consistent height. A concrete foundation is not necessary and finishing the surface like a seal can be done but is not important.

Normally the panels are laid on a gravel and grit bed and grouted with quartz sand. The only decisive step for a permanently firm and level position is the thorough compaction of the bed. The irregular surface forgives slight misalignments or minimal height differences.

Gravel optics in different colors

In particular, people with a preference for natural stone optics can often come to terms with the pebble surface of washed concrete as an alternative. Washed concrete can be made from many different rock additions. The pebbles are round and have different grain sizes. Smaller grain sizes are found in washed concrete with broken stones such as grit.

The color palette covers all occurring rock colors and also mixtures are a popular variant. The random texture does not require accurate placement, which also makes laying easier. Due to the tapered support concrete also the cutting of washed concrete slabs is relatively easy to accomplish. Since the price of washed concrete slabs is below that of almost all other stone and concrete slabs, even a little breakage in the processing is to get over.

How to lay washed concrete slabs

  • Washed concrete slabs (40 × 40,50 × 50 or 40 × 60 centimeters)
  • grit
  • sand
  • rubber hammer
  • Spirit level and / or guideline
  • shovel
  • Possibly pickaxe
  • Protective gloves
  • Possibly stone cutting machine
  • Rammer or shaker
  • rake
  • broom

1. Lift the bed

Lift a pit at least twenty centimeters deep below the stone surface. If the soil is loose, sandy or loamy, compact it with a masher.

2. Fill up the bed

Fill the pit one after another in three layers of about five to ten centimeters thick with chippings.

3. Compact bed

After each layer application, compact the grit with the shaker or rammer. When compacting, follow the principle "Much helps a lot".

4. Straighten

Straighten the last gravel surface with the rake. First take the tine side of the rake and turn the rake after the coarse straightening. Now pull the grit flat and think about a two-percent gradient.

5. Laying

Lay out the washed concrete slabs as desired and correct the situation with the rubber mallet.

6. Grouting

Distribute the quartz sand evenly and sweep it into the joints.

Tips & Tricks

To prevent later weeds from growing through the joints, you can put a special fleece underneath the washed concrete slabs to stop this growth.

Video Board: How to get a Exposed Aggregate Finish on Concrete