The basement ceiling determines living comfort and energy consumption


The central task of a basement ceiling is in most cases the insulation. If the basement is not a fully insulated living space, the basement ceiling protects against cold and energy loss. It can be insulated from above and below - even retrospectively.

Cellar ceiling and floor at the same time

The basement ceiling also represents the floor of the ground floor, making it the lower end of the living area in most buildings. Until the 1980s, the insulation of the basement ceiling was neglected. As their awareness of energy consumption grew, so did their importance.

Apart from the energy consumption, the living comfort on the ground floor increases due to a good insulation. In such important rooms as the kitchen and the living and dining area, footstep heat creates an additional cozy living atmosphere. Due to new types of insulating materials, subsequent insulation is no problem.

The basement ceiling determines living comfort and energy consumption: energy

Plastic sheets from below

The most common and common form of insulation on a basement ceiling is the application of insulation boards. Modern plastics produce a high insulating effect even in relatively small thicknesses. Finished polyurethane rigid foam products with five centimeters are glued to the basement ceiling from below.

In addition to polyurethane, manufacturers offer insulation boards made of polystyrene and mineral wool. Some of the insulation is designed for additional sound insulation. Tongue and groove plug-in systems allow every home improvement to install the insulation tightly and without thermal bridges.

For old cellar ceilings, a pre-treatment is often necessary. Any loose plaster must be removed and eliminated auskalalkende color. With a primer coat the carrying capacity of the basement ceiling is produced. For safety, the insulation boards can also be screwed.

Insulation from above and energy loss

The insulation of the basement ceiling from above should be left to professionals. The multi-layered structure and a properly applied screed require previous experience. If a professional insulation of the floor is carried out on the ground floor, in many cases an insulation of the basement ceiling from below is unnecessary.

Experts indicate as average values ​​an energy loss through the basement ceiling of five to ten percent. This is no longer allowed according to the currently valid Energy Saving Ordinance.

Tips & Tricks

If you want to convert a cellar into a living space, consider the prescribed minimum room height of 2.40 meters. This height must exist after the insulation of basement ceiling and floor slab. Polyurethane produces the highest insulation performance with the lowest material thickness.


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