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Intensity of biocorrosion on the surface of plasters made on EPS substrate

Dybowska-Józefiak Monika, Wesołowska Maria

Materiały Budowlane

2025

nr 6

73--78

One of the most common solutions for insulating the exterior walls of buildings is the ETICS (External Thermal Insulation Composite System), based on polystyrene. The durability of such a system is estimated at 25 years, but very often a degradation process of varying severity is observed after just a few years. The article deals with the changes occurring on thin-film plasters after prolonged exposure to the external environment in different orientations with respect to the world's sides and the resulting biocorrosion infestation.

Jednym z najczęściej stosowanych rozwiązań ocieplenia zewnętrznych ścian budynków jest system ETICS (External Thermal Insulation Composite System), bazujący na styropianie. Trwałość takiego systemu ocenia się na 25 lat, ale bardzo często już po kilku latach obserwuje się proces degradacji o różnym nasileniu. Artykuł dotyczy zmian zachodzących na tynkach cienkowarstwowych, po długotrwałej ekspozycji na środowisko zewnętrzne, w różnych orientacjach względem stron świata i wynikającego z nich zainfekowania biokorozją.

The influence of selected plaster coatings on the thermal performance of an ETICS system

Dybowska-Józefiak Monika, Wesołowska Maria

Budownictwo o Zoptymalizowanym Potencjale Energetycznym

2023

Vol. 12

107-115

The article presents the analysis of the thermal performance of an EPS-based system finished with different plaster coatings. The analysis is based on the results achieved at the field site station. The analysis took into account the type of plaster, its texture and the orientation of the exterior wall finish relative to its facing which the moisture content inside the EPS and under the plaster coating is also dependent. It is noted here that the accumulation of moisture takes place within the expanded polystyrene. It was also found that the stabilization of moisture levels in the insulation material depends on the type of external plaster coating. The actual thermal performance of the insulation material was analyzed using the results of the evaluation of the moisture properties in the expanded polystyrene under the plaster coating at the field site. The moisture results confirm that there is an accumulation of moisture in the insulation material, which has a significant impact on the value of thermal resistance, with the largest differences found in the north and west facing exterior wall finishes.