This is how you can clean your concrete slabs

Concrete slabs on the terrace pollute over time, in the joints then sets algae and moss. In order to clean the concrete slabs, then usually a lot of effort is needed - but if you proceed as planned, you can keep the work much lower. You can find out how it works here.

Background information

Due to the weather, tiny cracks form on the surface of the concrete blocks, where moss, algae and dirt can accumulate. That makes the terrace very unsightly very quickly. In order to eliminate the pollution, there are various possibilities, but not all are equally effective.

The high pressure cleaner

Basically, high-pressure cleaners work quite well - but you have to be careful with them. Not all concrete blocks are even suitable for the use of a high-pressure cleaner, and also with other stones, the use of the high-pressure cleaner may leave significant marks on the stones, especially at high pressure.

This is how you can clean your concrete slabs: your

In addition, the high-pressure cleaner also swirls the joint sand and small stones out of joint, which then heavily pollute the rest of the garden and make it possible to refill the joints. For added detergents you should be careful because of the possibly environmentally harmful effect, and use the high-pressure cleaner only with an attachment.

Chemical cleaning agents

Home-made recipes such as vinegar cleaner are usually better to discourage, but even professional cleaners can damage both some stones and the surrounding garden, the groundwater or pets.

In addition, the manual scrubbing is already a very strenuous task with smaller terraces, and often brings little success. For quick cleaning in between, so as not to let the dirt get too big, it is perfectly suitable, especially if you use special concrete stone cleaners.

Sealing as protection

It is highly recommended that you provide the concrete blocks with a suitable seal from the outset, and also close the joints tightly. In this way, the concrete block is dirt-repellent and the cleaning much easier. The seal should be reapplied every two to three years.

Step-by-step instructions for cleaning concrete blocks

  • ev. concrete stone cleaner
  • sealing
  • Scouring sand - as fine-grained and sharp-edged as possible
  • fine broom
  • household scrubber
  • High pressure cleaner with the highest possible performance

1. Remove coarse dirt with scouring sand

At the beginning you can remove the most soiling by vigorously sweeping over the terrace as fine as possible and as sharp as possible. This has a polishing effect, which breaks up especially dirt crusts and already removed a lot of dirt. The scouring sand method should therefore be at the beginning.

2. Use terrace cleaner

To solve stubborn soiling, you can apply a professional terrace cleaner and let it work. This also has a dirt-dissolving effect. Then you can grab the high-pressure cleaner, if your stones are suitable for it. However, you should be more careful with the detergent added to the high-pressure cleaner.

3. Insert high-pressure cleaner

This requires a bit of patience, as they must proceed slowly, row by row, keeping the beam aimed at a relatively small area. Was already pretreated with stone cleaner, it is a little faster. At the end, push the loosened dirt in front of you to rinse the terrace clean.

4. Seal

Use sealers from the hardware store according to the packing instructions, and carefully close the still moist joints with joint plaster, which also prevents weed and moss growth.

Tips & Tricks

If you use high-pressure cleaners, you should actually put on a professional device for patio cleaning, rather than the devices for home use. They are much more effective and can sometimes be borrowed.

Video Board: How To Clean Your Concrete Deck or Slab by Walt Barrett