Database MASEA

Projektinfo 07/2007

Indoor mould infestation – the building was equipped with a 6 cm-thick insulation 15 years ago. The insulation was insufficient from a building physics point of view.

Material data for energy-oriented refurbishment of old buildings

The stock of old buildings, which constitutes approximately 80% of all buildings, has the greatest potential for reducing energy consumption. Major energy savings can be made in this area through construction measures such as thermal insulation, the use of solar radiation or the improvement of the interior climate through heating, ventilation or cooling. Since the Energy Savings Ordinance came into force in February 2002, guidelines on energy-related and structural thermal protection also apply to the renovation of old buildings.

This makes the planners’ task more complex. While builders are usually more interested in finding the most cost-effective solution to complying with regulations, it is the planners who, with the same intention, have to implement the renovation measures for specific stocks of buildings. Unprofessional and physically flawed renovation of buildings can cause serious damage.
Problems often occur with the renovation of old buildings, such as mould formation or corrosion, which usually stem from limited knowledge of the moisture characteristics of the construction materials used in the original construction and those used today.

Often construction physical properties of modern products are attributed to the historical materials discovered in the building stock. The selection of materials used for repair work is correspondingly limited. Until now there has been a lack of an interlinked and extensive collection of hygrothermal material characteristic values, which can also be used as the basis for the available planning software.

Bild 1 - 0707 Abb.1: Indoor mould infestation – the building was equipped with a 6 cm-thick insulation 15 years ago. The insulation was insufficient from a building physics point of view.
Copyright:

Bild 2 - 0707 Abb.1a: Indoor mould infestation – the building was equipped with a 6 cm-thick insulation 15 years ago. The insulation was insufficient from a building physics point of view.
Copyright: Dr. Burkhard Schulze Darup, Architekt

Bild 3 - 0707 Abb.1b: Microscopic photograph of a typical indoor mould: Alternaria alternata
Copyright: Fraunhofer IBP

Bild 4 - 0707 Abb.2 engl: Material characteristic values
Copyright: BINE-Informationsdienst

Bild 5 - 0707 Abb.3: Algae infestation beneath Styropor insulation
Copyright: Franziska Herborn, Architektin

Bild 6 - 0707 Abb.4: Microscopic photograph of a typical indoor mould: Cladosporium cladosporioides
Copyright: Fraunhofer IBP

Bild 7 - 0707 Abb.5 engl: Diagram of a drying apparatus
Copyright: Universität Dresden

Bild 8 - 0707 Abb.6: Mould infestation through moisture accumulation on the surface and in the building component
Copyright: EMPA-Akademie: Die Gebäudehülle

Bild 9 - 0707 Abb.6b: Mould infestation through moisture accumulation on the surface and in the building component
Copyright: BINE-Informationsdienst

Bild 10 - 0707 Abb.7 engl: Building physics characteristic values (categories: insulation materials; boards)
Copyright: BINE Informationsdienst

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Copyright:

A detailed description of the building climate characteristics of as many construction materials as possible would provide a sound basis for correct renovation in terms of building physics. This information gap will be closed by a research project spsonsored by the Federal Ministry of Economics and Technology. The aim is provide users and producers of planning software with a database as large as possible on the material characteristics of historical and modern construction materials and make this database freely accessible on the Internet.

Overview of contents Projektinfo 07/2007: