Insulating render systems

Insulating render systems contain, apart from the usual render components, aggregates such as polystyrene, perlite or an aerogel. The insulation performance achieved in this way is comparable to that of commonly used insulation products.

Regulatory framework

In this work area, DIBt grants national technical approvals (abZ) and/or general construction technique permits (aBG) and issues European Technical Assessments (ETAs).

Regarding design and execution, the Administrative Provisions – Technical Building Rules of the relevant federal state must be observed. Cf. the common model MVV TB, in particular Section A 6 (Heat retention).

For insulating rendering or plastering mortar in accordance with European standard DIN EN 998-1, the design values for thermal conductivity set out in DIN 4108-4 apply. More favourable design values can be verified in accordance with MVV TB, A 6, Annex 6.2/3 based on a European Technical Assessment.

National procedure

To prepare an abZ/aBG for your construction product, we need an application from you. We recommend that you contact us prior to doing so. Feel free to send us your enquiry informally via email to dibt(at)dibt(.)de or to the competent technical contact listed in the top right.

For a first assessment, please send us the following information:

  • Description of the construction product and its intended field of use
    • e.g. material, configuration, number of sizes, variants, dimensions
    • e.g. use in walls, ceilings, interior construction, building services
  • Description of the construction technique and its field of application
    • e.g. design of walls, ceilings, elements, etc., and interaction of components
    • e.g. application in foundation engineering, reinforced concrete construction, building insulation; as load-bearing or non-load-bearing component; under static and quasi-static loading; fire exposure; other environmental exposures
  • Information regarding impact on regulatory concerns
    • in particular structural integrity, fire protection, health and environment protection, sound insulation as well as thermal performance
  • Explanation of need for an abZ/aBG
  • Contact details
    • preferably email address and/or telephone number, as well as name, organisation/company, and postal address

We will then contact you to clarify the next steps.

If you already hold a DIBt approval and/or construction technique permit and wish to apply for an amendment, supplement, or renewal, please use the form provided below.

European Technical Assessment (ETA)

To start the ETA procedure, please submit the form below. We will then check if the prerequisites for issuing an ETA are met, i.e., in particular, if the product is not fully covered by an existing harmonised standard. If the prerequisites are met, we will check whether a European Assessment Document (EAD) covering the requested assessment scope already exists or still needs to be developed. If an EAD needs to be developed or amended, a complete technical file needs to be established before the procedure can begin.