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This paper provides initial results from experimental work on the durability of external thermal insulation composite system (ETICS). In order to predict service life of ETICS, the accelerated climatic cycle was composed on the basis of earlier scientific research and the statistic data of the Lithuanian climate. The research aims to assess the durability and service life of finishing coat by calculating the amount of moisture while measuring the 24 h water absorption of the samples during water absorption and drying testing either by measuring the changes of bond strength. The offered accelerated weathering cycle could be useful for ETICS manufacturers and it could be used for testing and proof of highly frost-resistant products.

DOI: http://dx.doi.org/10.5755/j01.ms.19.1.3834

The paper proposes the durability prediction method for external thermal insulation composite system (ETICS), which could be applied in cold and wet climate regions. This improved method is based on the international and nowadays applicable standards for systems service life assessment (ETAG 004, ISO 15462), and completes them with other necessary impact criteria. This study examines the main climate exposures and how these impacts reproduced in the laboratories. The paper analyses the extreme air temperature and rainfall changes, the intensity of ultraviolet radiation (UV) in Lithuania. The analysis is based on evaluation of daily and yearly data recorded by meteorological stations. The aim of the research is to compose the accelerated ageing cycle for ETICS taking into account the characteristics of building materials and identifying the potential degradation factors and indicators. In order to establish the combinations of impacts in ageing cycles, it is necessary the adequate evaluation of intensity of environmental exposures of a certain locality. The basic goal is to create the reliable accelerated ageing cycle which would be as similar as natural ageing.

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