The laying of concrete slabs is no problem for every crafted home improvement. However, you must have the physically hard work, which is created by the weight of the concrete. With a helper you are not only faster, but also save your health.
Ensure weight stability and water drainage
The high weight of the concrete slabs has the advantage that they will be stable and immobile, even if people are moving or standing on them. It should be borne in mind that this dead weight has to be borne by the subsurface in the long term and mistakes in preparation can lead to individual or even several concrete slabs later sagging.
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This risk also arises from possible underwashing if the water drainage was not sufficiently taken into account before and during installation. Therefore, a gradient - away from the house - must be created both when excavating the earth and when laying the concrete slabs. The bed can consist of sand, gravel or mortar (7.79 € at Amazon *), but must always guarantee a high water permeability.
Draw and pre-sort in a pattern
If you want to lay on the surface of different colored concrete plates, draw a laying plan and calculate the needs of the individual colors. Prepare the laying by sorting the required stones in the order in which they will be relocated later. Any concrete saw should be completed before the laying. Any cut edges should always be aligned towards the house when it is possible.
Concrete slabs can also be laid with so-called plate bearings. The round plastic plates with a joint cross mounted joints form the insertion forms for the individual concrete slabs. This creates a uniform joint strength on the whole area. The concrete slabs lie loosely in the respective joint corners and can later be lifted out individually and replaced at any time. The alignment and straightening of the entire surface is facilitated by the height of the individual pavement supports, the height of which can be corrected with a rubber mallet.
- Concrete slabs
- Gravel, crushed stone or sand
- Possibly adhesive mortar
- Spade and shovel
- Spirit level
- Guide line and wooden sticks
- Peel bar
- Rubber mallet
- Cross spacers
1. Dig the subsoil
Depending on the later load on the concrete slabs, the slab bed should be ten to twenty centimeters thick. Added to this is the concrete slab thickness of three to five centimeters. Think about the necessary gradient.
2. Stretch a guideline on wooden sticks
Drive wooden sticks into the ground at each corner of the laying area and attach the plumb line. In the case of very large areas, also mount guide lines at intermediate distances that take the required slope into account.
3. Laying concrete slabs
Start laying in one corner and fill row by row. Insert the spacers between the concrete slabs at the beginning of each new row.
4th. Straighten the surface
From the second row onwards, align the newly laid concrete slabs with the rubber mallet and the spirit level. Take into account the general inclination of the total area.
5. Use the joint thickness to compensate
If individual concrete slabs are offset after several rows, use the tolerance of the joints for correction. Use the peeling strip to keep pulling the surface that has already been laid in order to maintain the straightening.
6th. Do not fill joints
When laying concrete slabs, leave the joints unfilled. This gives the surface the necessary play to compensate for temperature differences and load peaks.Tips & Tricks You can use gravel or crushed stone as a loose bed. You should pour a two to three centimeter thick fine layer over a main layer of coarse gravel or crushed stone several centimeters thick. This enables the concrete slabs to be aligned and placed more precisely. The best fixation is given when using mortar.