The Biggest Prejudices and Errors About Sanitation

The Biggest Prejudices and Errors About Sanitation


Renovate or rebuild? Whether remediation measures save costs, there are many prejudices and errors. Not everything is correct.

Renovation is a bottomless pit

The fact is that renovating an old building is an excellent plan. However, a specialist should first create an overall concept. All measures should be carried out in a reasonable order.

The house can not breathe after damding

No house can breathe, either before or after dams. Masonry does not let through either water vapor or air. Thermal insulation can therefore not lead to mold formation.

Dense windows lead to mold on the walls

Mold is caused by moisture. This, in turn, is the result of warm, humid air cooling on a wall.

The fact is, however, that the water accumulates on the windows in uninsulated windows and thus the room air is drier than in well-insulated windows. For this reason it is important to also dam the façade and ventilate regularly.

An old house will never become an efficiency house

By installing new windows and insulating the façades, even the passive house standard for an old building is possible. Technically, there is no reason why an old building can not meet modern living standards.

Listed houses can not be energetically restored

Admittedly, the renovation of houses that are under monument protection is more complicated than with other old buildings. But the insulation of the facades can be implemented excellently from the inside. In addition, today there are many well-insulated windows that meet the requirements of historic preservation.

These measures, combined with the insulation of the roof and the installation of a modern heating system, can result in energy improvements of up to 60 percent.

Electrical renovation means prizing walls

Many pipes can be laid in the floor or baseboards. Milling slots is usually superfluous.

Energetic renovations do not pay off

This is too short notice. The fact is that, although high investments are required to bring a house to a modern energy standard. In the following years, significantly lower costs for the production of heating and hot water are incurred.

The payback period is 5 to 20 years depending on the measure, the lifetime of the house far exceeds this time. In the long term, therefore, these measures always pay off.

Insulation production requires more energy than is saved

This is also very short-sighted. Studies have shown that even the production of polystyrene in high insulation thicknesses of 30 centimeters consumes less energy than is saved in three heating periods. If you want to protect the environment, it is better to opt for insulating material from renewable raw materials, instead of sacrificing insulation.

There is hardly any funding for energy-efficient renovation

This is not true, at least not in Germany. Funds from the KfW and funds from the BAFA are widely available for the energetic refurbishment and construction of solar plants.

Most importantly, the funds are also available for planning and advice from a specialist.

It is Rebuilding cheaper instead of rehabilitating

Builders who are in the midst of renovation will agree with this sentence. They overlook the fact that building a shell is 50 percent of the total energy expenditure of a new building.



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