Beitrag zur Lösung des Problems der Algenbildung auf Außenwänden mit Wärmedämmverbundsystemen (WDVS)

Korjenić, Azra; Steuer, Radek; Šťastník, Stanislav; Vála, Jiří; Bednar, Thomas

doi:10.1002/bapi.200910045

Cited by 9 publications

(9 citation statements)

References 8 publications

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“…The list of degradation factors was collected through a literature review. The list of shortcomings is based on descriptive instructions, recommendations, harmonized standards, set requirements [38][39][40][41][42][43], studies regarding simulations or material studies made in laboratory conditions [11][12][13][14], field research [2,3,5,7,51,[68][69][70][71][72][73][74][75][76][77][78][79][80], and books on the topic [6,9,10] . Based on these references published between 1996 and 2015, a list of identified on-site degradation factors was created.…”

Section: Selection Of Degradation Factorsmentioning

confidence: 99%

“…Literature Source Substrate (S) [6,9,10,56,64,68,73] Adhesive (D) [6,7,[9][10][11][12]14,15,46,56,69,73,76] Insulation (I) [6,9,10,13,49,50,58,72,73] Mechanical anchors (A) [6,9,10,40,41] Reinforcement (R) [2,6,9,10,55] Finishing layer (F) [6,[9][10][11]14,69] Additional details (X) [6,9,10,53,62] To reveal questionnaire errors, one declared and one undeclared pre-test were conducted. Similarly, individual pre-testing has been used by other researchers…”

Section: Layermentioning

confidence: 99%

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Construction Process Technical Impact Factors on Degradation of the External Thermal Insulation Composite System

Sulakatko

Vogdt

2018

Sustainability

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The European climate strategy has encouraged the usage of the External Thermal Insulation Composite System (ETICS) to increase the energy efficiency of external building envelopes. This externally and relatively easily applicable façade solution must meet various technical requirements. This paper develops a technical severity evaluation model of on-site construction activities of ETICS to prioritize the risks of the construction process. The model can be used independently by any stakeholder of the construction process. The relevance of the activities is assessed with the Failure Mode Effects Analysis method. The model weights the impact of the essential technical requirements and simulates an integrated weighted technical severity value, which is derived from the analysis of experts’ judgments validated with the non-parametric Friedman’s test. The data collection for probability of occurrence and difficulty of detectability follows the Delphi technique to quantify the opinions of a group. The simulation, conducted on 103 degradation factors, shows that the on-site construction activities of ETICS strongly influence the decrease in the technical resilience of long-term durability, mechanical resistance, and stability, as well as the ability to bypass tensions. The highest risk is detected by the shortcomings in the layers of substrate, reinforcement, adhesive, and additional details.

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Section: Selection Of Degradation Factorsmentioning

confidence: 99%

Section: Layermentioning

confidence: 99%

Construction Process Technical Impact Factors on Degradation of the External Thermal Insulation Composite System

Sulakatko

Vogdt

2018

Sustainability

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“…The list of shortcomings was formulated from descriptive instructions, recommendations, harmonized standards and set requirements [9,[22][23][24][25][26], research regarding simulations or material studies conducted in laboratory conditions [12][13][14], field research [3][4][5]34,[52][53][54][55][56][57][58][59][60][61][62][63][64], and books on the topic [6,10,11]. The selected factors were verified by two experts, who had more than 12 years' experience with ETICS.…”

Section: Onsite Degradation Factors Of Eticsmentioning

confidence: 99%

Modelling the Technical–Economic Relevance of the ETICS Construction Process

Sulakatko

2018

Buildings

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The increased number of energy efficiency requirements of the European Union has increased the renovation rate of apartment buildings. The external thermal insulation composite system (ETICS) is often used to upgrade the façade. However, the construction process shortcomings very often cause defects shortly after completion. This paper develops a technical-economic relevance assessment model of the onsite degradation factors for better quality assurance in an SME. The model quantifies the technical significance of the degradation factors along with the future repair costs. The technical severity of 103 factors is evaluated by 12 experts, and the data is validated with the Friedman's test. The occurrence ratio, detectability, and latency period are foreseen by five experts and validated with the Delphi technique. The results of the three sample simulations emphasize the activities during substrate preparation and application of adhesive as well as a base coat with reinforcement mesh. The application of a finishing coat and installation of insulation plates have less relevance. It is recommended to upskill the craftsmen in regard to working with mixtures as the shortcomings are covered simultaneously and the failure detection period is short. The measures to protect against external weather effects are recommended due to their relatively high impact. Half of the shortcomings appear during the first two years.

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“…Some generalizations are straightforward: e. g. it is possible to introduce an additional open set Ω 0 = R 3 \ Ω, consequently the slight modifications of (1), (2), (3) and finally of (4) enables us to implement heat transfer on all Γ i in the form g = γ∇(τ 0 − τ i ). Similarly, using the formula g = σ ∇(τ 4 0 − τ 4 i ) with the Stefan constant σ (for real building surfaces multiplied by some emissivity factor), we can take into account also the surface radiation: [9] demonstrates the significance of such considerations, namely in the case of external thermal insulation composite systems, where the temperature decrease at the outer insulation surface leads to water condensation and population of algae, as documented on 2 right photos of Fig. 1.…”

Section: Computational Approachesmentioning

confidence: 99%

Numerical prediction of energy consumption in buildings with controlled interior temperature

Jarošová¹,

Šťastník²

2015

AIP Conference Proceedings

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A broadband energy-based boundary element method for predicting vehicle interior noise Abstract. New European directives bring strong requirement to the energy consumption of building objects, supporting the renewable energy sources. Whereas in the case of family and similar houses this can lead up to absurd consequences, for building objects with controlled interior temperature the optimization of energy demand is really needed.The paper demonstrates the system approach to the modelling of thermal insulation and accumulation abilities of such objetcs, incorporating the significant influence of additional physical processes, as surface heat radiation and moisture-driven deterioration of insulation layers. An illustrative example shows the numerical prediction of energy consumption of a freezing plant in one Central European climatic year.

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Beitrag zur Lösung des Problems der Algenbildung auf Außenwänden mit Wärmedämmverbundsystemen (WDVS)

Cited by 9 publications

References 8 publications

Construction Process Technical Impact Factors on Degradation of the External Thermal Insulation Composite System

Construction Process Technical Impact Factors on Degradation of the External Thermal Insulation Composite System

Modelling the Technical–Economic Relevance of the ETICS Construction Process

Numerical prediction of energy consumption in buildings with controlled interior temperature

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