Fraunhofer Institute for Building Physics
Accelerated test to assess the microbial growth resistance of exterior finishes
Hygrothermics
| Measurement | Sensitivity of coatings to microbial infestation |
| Standard | Own testing method |
| Measurement object | Outside coatings like plaster or paint |
Technical data
| Specimen size (H × W) | Typically 100 × 100 mm |
| Room volume | Approx. 2 m³ |
| Entrance door (H × W) | 1.60 × 1.40 m |
| Number of specimen | Max. 70 (at 100 × 100 mm) |
Special features
- Acceleration of microbial growth with a factor of 10 or more
- Natural transient climatic conditions in a daily course
- Autumn climate with weekly rain
- Simulation of the nocturnal undercooling by backside cooling below dew-point temperature
- Inoculation with a cocktail of microbial primary coloniser
More information
- Left and right side separate individual undercooling possible
- Typical test time: 100 days