What is there in space?

Enclosed space

What is enclosed space? What does it mean today?

In the past, the building volume was given in the nominal size "enclosed space". The DIN 277 - floor space and volume - defined this size. The DIN standard has been changed several times since 1934. Its most recent version from January 2016 replaces the term Enclosed space (UR) of the old version from 1950 by the Gross volume (BRI). Both expressions are still used synonymously in the specialist literature and in the linguistic usage of house building companies, architects, building authorities and credit institutions. That's how it is Calculation of built-up space for house construction financing Of importance: With the help of the UR, profitability calculations of the construction project can be carried out and costs for building or buying a house can be determined. In addition, the mortgage lending value for building permits or a market value appraisal can be calculated on the basis of the UR. Since building permit fees and fees for the static-constructive test can be calculated on this basis, the mortgage lending value is a decisive factor for borrowers. In addition, the calculation of the converted space for the Building application necessary.

What does enclosed space include?

While shell dimensions apply to the converted space, the gross space relates to finished dimensions as external dimensions. In the case of rooms that have already been plastered, 2 percent must be deducted for plastering for the calculation of the converted space. Particular attention should also be paid to the calculation of the enclosed space Sloping ceilings to lay. Only 1/3 of the roof spaces that have not been developed are included in the UR, whereas the BRI includes all of its space. Roof constructions are included in the UR up to the top edge of the roof construction (for example rafters), in the BRI the entire volume is integrated up to the surface of the roof covering. The calculation of the converted space is similar to the calculation of living space, whereby the basement and garage also belong to the UR. Dormers, entrance canopies, external stairs, external ramps, roof overhangs of incompletely closed areas, light shafts, installation shafts, chimney heads, foundations are not part of the enclosed space.

Formulas for calculating the UR

The existing m³ of enclosed space can be calculated according to DIN 277. It regulates how the floor space and volume of buildings are to be determined. In particular, it is used when determining the areas in the house. To calculate the converted space, you first multiply the length, width and height of each full storey. The same procedure is used for converted attic floors, only the result is divided by 2. The formula (length x width x height: 2): 3 is to be used for attic floors that have not been developed. If the details of the gross room volume are available, the enclosed space can be calculated from them without any problems. In the first step, the m³ information for all areas that are not covered and not completely enclosed must be deducted from this value. In the second step, 2/3 of all parts of the attic that have not been developed are removed. Of course, the calculation also works in the opposite direction, so that the gross volume can be determined from the converted space.