Instructions for the renovation of the basement floor

Renovating an old floor in the basement can be a time-consuming task. Depending on the planned use of the cellar, this task can also be made much easier. How to do that, you can read here.

Background information

Important in the basement soil remediation is to ensure that no soil moisture can rise. Over a damaged or no longer very dense basement floor a lot of moisture can penetrate - that makes within a very short time any effort in the renovation destroyed.

First of all, the condition of the soil is decisive: If there is already a screed which is still reasonably intact, a watertight separating layer and a thin layer of additional screed are sufficient. If there is no floor structure in the basement, it will be more complex.

Complete construction of the floor

If only unprepared ground is present, it must first be excavated. Then apply a layer of gravel and lean concrete at least 5 cm high, and pour a base plate over it, on which you apply a seal, preferably with bitumen.

On the seal then comes a heat-insulating layer, a release layer and above the new screed. This undertaking is time consuming and causes quite considerable costs - better, if a screed already exists.

Step-by-step instructions for basement soil remediation with existing screed

  • waterproof PE film
  • Liquid screed with sealant, better cast asphalt (for large surfaces)
  • possibly filling material for cracks
  • sealing tape
  • spatula
  • Estrichpumpe

1. Check the screed

The old screed should be cleaned and checked for rough bumps and cracks. If it is still reasonably intact, you can simply fill out the rough cracks and apply a PE film, which you stick to the edge with sealing tape.

However, if the basement is then used as a living space, an additional layer of insulation and footfall sound insulation is required, in addition you should lay pressure distribution boards.

2. Installation of the screed

The easiest and cheapest way is with liquid screed, to which a suitable sealant is added. Even more advantageous is poured asphalt screed, which also has heat-insulating properties and is also waterproof. In some cases, you can save even here when used as a living room an additional insulation.

3. Floor construction

On the screed then any floor covering can be applied. Concrete screed you can also grind and provided with a vapor-permeable seal - so you have a stable and easy-care floor.

Tips & Tricks

Even if there is no screed, you can apply the floor structure with mastic asphalt screed on a clean layer. He has many qualities that make him particularly suitable for this purpose.

Video Board: Basement renovation 2