Abstract

Degradation of mineral wool: the effect of elevated temperature and moisture content on the hygrothermal properties

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Abstract

Mineral wool is commonly used as an insulation material on buildings as the main insulation material or as fire breaks in buildings insulated with EPS. In ETICS facades, problems have occurred at the mineral wool fire break, where water has accumulated between the fire break and EPS insulation, and the water has been absorbed into the mineral wool and can lead to horizontal cracks along the façade. As the facade can heat up to 70˚C, which will transfer the heat to the mineral wool, creating a warm and moist environment which can have an effect on the mineral wool’s properties. Mineral wool samples were aged in water at a elevated temperature and then, compressive strength and moisture retention curves determined. Results showed a significant loss of strength and higher water retention due to the aging process, which could lead to the deterioration of the façade.

Keywords: moisture, mineral wool, ETICS, hygrothermal performance

How to Cite:

Olak, H., Kalamees, T., Klõšeiko, P. & Vilba, K., (2025) “Degradation of mineral wool: the effect of elevated temperature and moisture content on the hygrothermal properties”, UCL Open Environment 7(S1). doi: https://doi.org/10.14324/111.444/ucloe.icmb25.a29

Rights: Author, [2025]