children paintings on the wall of a school
After environmental clean-up of the buildings, all the pure materials from the demolition, such as concrete, iron, glass and roofing felt were reused.

Reuse of building materials

Materials from demolished school reused

Holbæk Municipality saved money and avoided environmental problems by focusing on resource utilisation in connection with the demolition of the school Brunhøjskolen.

Holbæk Municipality saved DKK 200,000 on the demolition of the school Brunhøjskolen by reusing most of the school buildings.

The savings could be realised because the municipality had decided to spend both time and money on a thorough preliminary study of the building materials and the soil at the site. The municipality had done so to avoid unpleasant surprises, thus allowing the municipality to focus on resource utilisation.

Resource check and focus on environmentally harmful substances

Well before the demolition, a resource check was made of the buildings, in which materials suitable for reuse were identified.

Moreover, all details about environmentally harmful substances in the ground and building materials from the school were carefully studied before tenders were invited for the demolition. This meant that most of the materials from the school buildings could be reused.

Brunhøjskolen in Holbæk was old and worn. The school was far from up-to-date, and the buildings from 1971 were worn out. As a result, the municipality had decided to demolish the school.

Demolition below budget

The budget of DKK 4.7 million for the demolition included a reserve for unforeseen expenses. The reserve was not spent and the price of the demolition ended at nearly DKK 4.5 million.

Often tender documents are prepared before there is a plan for how building materials can be disposed of. In this case, it was done the other way around, thus making it possible to consider symbiosis effects and create value.

Pure materials for reuse

After environmental clean-up of the buildings, all the pure materials from the demolition, such as concrete, iron, glass and roofing felt were reused. It was ensured that the materials were pure by thoroughly mapping of what materials contained environmentally harmful substances. The materials that contained harmful substances subsequently underwent environmental clean-up before they were sold for reuse.

The pure, crushed concrete of a total of 2,000 tonnes from Brunhøjskolen were transported to Søbæk Have where it was reused as sub-base gravel under the peripheral road. At the same time, surplus soil from the peripheral road was used at Brunhøjskolen for filling holes in the ground after the demolition.

The thorough preliminary study meant that we only saw very few surprises in connection with the actual demolition. And the ones we saw were hidden for the people taking the samples.

Project Manager Søren Kofod, Holbæk Municipality, Municipal Construction under Growth and Sustainability.