Certified engineers

Demolition of older and obsolete construction materials for area restoration

Demolition: Analysis and assessment of contaminated construction materials

Every day in Germany, 297 acres of free space are consumed, sealed and built on. Against this backdrop of an enormous consumption of space, the renovation of existing buildings is a new theme in urban-planning. In order to implement the latest and most modern development in cities, the demolition of old and obsolete buildings is essential for the construction of new buildings.

We have the expertise required to economically and ecologically conduct your demolition in a sustainable manner. For many years, our company has played a key role in hundreds of demolition projects, from detached homes to a paper factory covering several acres. Controlled demolition requires expert and experienced planning and supervision in order to recognise contaminated construction materials, to remediate and dispose of them in order to conform to current sustainability standards.

We offer you these demolition services:

  • Demolition tenders
  • Expert supervision
  • Site management
  • Expert documentation of demolition and disposal procedures
  • Creation of demolition applications and obtention of permits
  • Pollutant investigation
  • Demolition field book
  • Pollutant field book
  • Demolition and disposal concepts
  • Cubic metre estimates
  • Remediation and disposal cost estimates

We support builders during the entire planning phase, with the requisite applications and the demolition activities, and document the entire procedure in a final report. We are in close contact with the authorities involved, and enable the builder to provide optimally customised and individual solutions.

Demolition field book

A demolition field book includes the investigation, analysis and assessment of contaminated construction materials in buildings, and is created before performing demolition activities. The objective of the demolition field book is to detect building pollutants to an extent as large as possible, such as asbestos, cancerogenic artificial mineral fibres (AMF), PAHs (polycyclic aromatic hydrocarbons / tar oils), PCBs as softeners (polychlorinated biphenyls), mineral oils, wood protectants such as lindane and PCP (pentachlorophenol) and various other groups of pollutants.

Similarly to the demolition field book, the pollutant field book records  contaminated construction materials prior to reconstruction, repair and remediation work in buildings, and can also be used in real estate sales to determine valuations.

Based on the demolition field book, a demolition, remediation and disposal concept can be created, as well as estimates of cubic meterage and remediation/disposal costs for building pollutants.

We have years of experience in investigating and in remediating building pollutants. We would be pleased to be your point of contact when you sell, recontruct or deconstruct your buildings. It’s important to know that in all German states, the investigation of building pollutants is the responsibility of the builder, and that the demolition field book is usually required as a part of the demolition approval process.

Assessment of building materials

In addition to creating demolition and inventory field books for building deconstruction and reconstruction activities, our services in terms of assessing building materials includes the design, planning, tenders and expert monitoring of building restorations and renovations.

Demolition or remediation: Systematic demolition or deconstruction with remediation

Within the building industry tear-down, demolition or deconstruction all denote the partial or complete destruction and disposal of buildings of all kinds. The terms tear-down, demolition and deconstruction are used synonymously. This can involve various procedures, such as removal, compaction, disassembly, drilling of holes, breaking up with a wrecking ball or controlled blasting.

The following tasks may form part of the remediation process:

• the renovation of buildings, parts of buildings or settled areas
• the removal of contaminants in terms of environmental engineering
• the restoration of water quality for habitat purposes and water use

What to pay attention to with regard to demolition and remediation:

Before a demolition or tear-down can occur, one must obtain relevant demolition permits that define the exact demolition processes which must be adhered to. These permits are also often required for partial demolition due to changes concerning the form or quality of a building. Before demolition, the SiGeKo (Health and Safety Protection Coordinator) must undertake all health and safety protection activities.

One can perform so-called ‘coring’ on a building, in which only the historical facade is preserved. Furthermore, core remediation can be conducted in which all remediation activities are performed in order to restore a building and to return it to a nearly new state. For this, often all parts up to the supporting walls and ceilings of the building are restored.

If, during the demolition, contaminated materials, such as asbestos, artificial mineral fibres, PCBs, formaldehyde, wood protectants, PAHs, heavy metals and the like are found, these must be disposed of separately. For this, we perform a pollutant investigation of the buildings, whereby we research the history of construction and its utilisation history, create a sampling plan, and conduct a technical investigation. We create a pollutant field book as a part of the assessment and deconstruction planning process. From this, a deconstruction concept is developed, which incorporates an appropriate safety concept. Following this, we compile a concept of disposal and are then able to formulate a cost estimate.


Our expertise in demolition and remediation includes:

  • the investigation and assessment of contaminated building materials in the context of inventory and demolition field books.
  • the design, organisation and implementation-monitoring of restoration and remediation activities (including asbestos remediation and PCB remediation).

Our many years of experience in all areas of pollutant issues means that we can give optimal advice regarding planning and execution for all projects.


Important areas and topics related to demolition:


In the context of construction, the term ‘earthworks’ is used when soil is changed in terms of its position, its original bearing condition or its form. Various forms of earthworks are referred to in this respect, such as cutting and filling, damming, embankment, excavation/excavated material and trenching. It is important in construction that the soil is sufficiently compressed, so that when buildings are constructed, it does not lead to settling and resulting cracks in the building. We perform the needed calculations for you and your earthworks. We offer the geotechnical disciplines of soil statics, foundation construction, soil mechanics and material testing for concrete construction projects, thereby developing proof of stability.

House demolition

We offer support for your house demolition to minimise the arising costs accompanied by it. A demolition company is normally commissioned to demolish a house. Appropriate safety measures must be adhered to for proper professional house demolition, which this can be very costly. The removal and disposal of waste, especially pollutants, can drive up costs as well. Before a houser can be demolished, you must inform the responsible construction authority in order to carry out a legal house demolition. Please investigate whether further permits are required. For listed houses, including those near your property, special stipulations must be adhered to. If you require official permits, we would be glad to perform the demolition planning for you.

Demolition firms

We work closely with trusted demolition firms with whom we have had a long-standing business relationship. We can create a plan customised to your demolition project for all construction phases.



Call us at:

+49 228 – 97458293
 Learn more about our company.

KÜHN Geoconsulting® GmbH is an independent consulting firm that has been active in the fields of subsoil consulting and remediation of contaminated sites for more than 50 years.

With an engineering quota of 74 percent and a workforce of over 50 long-standing employees, we are in a position to serve even major projects reliably, on time and to the highest quality standards.

With the experience from more than 22,500 orders, from single-family homes to high-rise office buildings, our employees develop professional, customer- and practice-oriented solutions.

Certifications and further training are an integral part of our corporate culture, so that you always receive the best state-of-the-art solutions from us.

Companies for which we have already completed projects and orders and who place their trust in us are HochTief, Deutsche Leasing, Vodafon or the city of Cologne. This is only a small selection. Feel free to ask us for further references.