Abstract
The systematic inadequacies of the External Thermal Insulation Composite System (ETICS), which occur during the construction phase, increase the financial risk for stakeholders, while reducing the long-term durability of the facade. The economic effect of on-site shortcomings can be reduced if the most significant on-site activities are recognised. The current paper develops an economic relevance assessment model for on-site construction activities of ETICS to increase economic rationality of resource allocation and emphasise the high-risk systematic shortcomings. The economic assessment model quantifies the financial risk of the on-site degradation factors with the method of modified Failure Mode Effects Analysis (FMEA). The data collection is followed by experts’ judgments and is validated with the Delphi technique. The study reveals that degradation factors in the early phases of construction have the highest relevance due to high costs of repair as well as high occurrence possibility and higher detection difficulty due to rapid coverage. Ninety percent of the shortcomings appear during the first five years of completion of the construction. The on-site failures occurring during the application of mechanical anchors and finishing layer cause the lowest financial risk. The model enables the economic effect of the on-site activities to be prioritised for better resource allocation.
Highlights
The European Commission has indicated that by 2020 all new builds must be Nearly Zero-Energy Buildings (NZEBs) to meet the European climate strategy targets
This study focuses on the shortcomings during the onsite construction process of External Thermal Insulation Composite System (ETICS) with an emphasis on their impact on future costs
This paper develops an ETICS economic assessment model, which considers the future cost of shortcomings as the variable of severity with the modified Failure Mode Effects Analysis (FMEA) method
Summary
The European Commission has indicated that by 2020 all new builds must be Nearly Zero-Energy Buildings (NZEBs) to meet the European climate strategy targets. The energy use reduction will have to be achieved largely through the renovation of existing buildings. Using a thin-layer rendering system on the building’s exterior facade is one refurbishment possibility. In European countries, the usage of the External Thermal Insulation Composite System (ETICS) and the interest in the aspects of construction quality are increasing. Until now the features of on-site construction process management and building technology on the quality of ETICS have been studied in isolation and comparison of different research findings have received too little attention. It is important to understand that shortcomings in the construction process and different construction technology aspects have an essential impact on future costs
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