Cellar renovation in the old building: You should note that

Unlike in new buildings, the cellar renovation in old buildings is often complicated and depends largely on the building materials and construction techniques used. Especially in very old buildings, the cellar renovation is often limited and moisture often difficult to eliminate. What you have to look out for in the old building, read in this article.

Background information

When it comes to the old building Basement, it depends above all on the year of construction, the building materials used and the construction technology, when it comes to the extent to which a cellar renovation can be successfully carried out, and with what costs can be expected.

Natural stone cellars are particularly problematic here - they are excellent storerooms for vegetables and food, but often simply unsuitable as living spaces even with complex renovation measures.

Tightness of the cellar

Basement walls must be able to withstand numerous moisture loads. This starts with possibly oppressive groundwater, up to leachate, rising soil moisture and condensation or so-called condensation water. Keeping the cellar humidity in the old building below 60% can often require considerable effort.

The most important measures include a seal of the basement from the outside against leachate, possibly splash water and oppressive groundwater, a seal of the bottom plate against rising soil moisture and the installation of a horizontal barrier against rising damp in the walls. In addition, the basic joints should also be sealed and measures taken to prevent condensation.

Step-by-step instructions for the renovation of old cellars

1. Analysis of tightness

In addition to measuring the humidity, you should also examine the walls for any visible damage in order to determine as precisely as possible the cause of water or moisture ingress. If possible, contact an independent expert to discuss with him the most effective remedial measures.

2nd seal

Where necessary, refurbishment measures should be carried out by specialist companies in line with the building materials and construction techniques used. Especially with stone cellars, the possible measures here are often quite limited, especially because of the often very high clay content in the walls.

After the sealing, you can then apply renovation plaster on the walls, if necessary, for better ventilation and a controlled drying out of the walls. The extent to which you can use drying equipment depends on the structure of the cellar.

In the case of natural stone basements, it is best to sandblast the walls and then cover with lime plaster or with several layers of lime paint. This is still the most effective, prevents mildew and mold odor and lets the walls dry out slowly, if not too much moisture from the outside complies.

Tips & Tricks

Be sure to rely on independent surveyors at the policy briefing, and not on companies that will always advise you on self-proposed remediation - even if they promise little lasting success.

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