Abstract
Basic factors affecting the appearance of algae discoloration on the surface of the system are recognized effects of the external environment (external temperature and humidity, short- and long-term radiation, precipitation, wind and air pollution). Internal factors are often neglected by international technical documents on the evaluation of the effectiveness of resistance to biocorrosion of the External Thermal Insulation Composite System (ETICS). Based on literature data and in situ research, the basic internal factors responsible for the occurrence or intensification of the biocorrosion process were systematized. Internal factors were divided into two groups: (1) plaster properties and (2) solutions for material layouts and building details. The results of research on these factors indicate that they directly or indirectly influence the humidity condition of plaster and biocorrosion development is a consequence of this state. The opposite issue, the influence of biocorrosion on plaster properties, is analyzed only in patrial way.
Highlights
ETICS stands for External Thermal Insulation Composite System [1]
The use of structural plasters in ETICS systems should be based on the system structure and the results of thermal and moisture calculations and on the place of installation and analysis of other characteristics and properties
It is much less efficient and, as a result, the plaster on north-facing exterior walls remains damp for most of the day
Summary
ETICS stands for External Thermal Insulation Composite System (this building system is often called EIFS in North America) [1]. Due to the long-wave radiation from the sky, the light exterior wall finish can reach temperatures even below the ambient temperature This happens especially at night with a clear cold sky, which is typical of the transitional seasons. The use of structural plasters in ETICS systems should be based on the system structure and the results of thermal and moisture calculations (elimination of interlayer condensation) and on the place of installation and analysis of other characteristics and properties They should have the following characteristics: low water absorption, diffusivity, resistance to dirt, resistance to biological infestation, UV resistance [15]. Silicate plasters: Their base is potassium water glass with the addition of polymer resin dispersion and modifiers that reduce absorption They are vapor permeable and rain resistant. Other types of plasters reach a few to several percent: 13% in the case of polymer plasters, 10% for silicone plasters, 5% for silicate plasters and 18% for other types [22]
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call