The Effect of Temperature and Humidity on the Permanence of External Thermal Insulation Composite Systems

Liisma, Eneli; Lõhmus, Gert; Raado, Lembi-Merike

doi:10.1016/j.proeng.2015.06.156

Cited by 14 publications

(8 citation statements)

References 6 publications

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“…Defects often occur as a consequence of detailing shortfalls or poor workmanship. The finishing coat of ETICS is the most vulnerable layer exposed to climatic factors [8][9][10][11]. Precipitation, solar radiation, and temperature differences may negatively impact the thermal-insulation system, causing a broad range of types of damage [1,[5][6][7][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…In order to prevent the fast spread of fire, different provisions can be made, such as barriers of noncombustible material such as mineral wool around the openings, and horizontal isolation barriers around the buildings between different floors [4,7,9]. Parallel to the emergence of new recommendations, there are various technical doubts about the possible negative effects of such a combination [6][7][8][16][17][18][19]. One is the presumption that there may be cracks in the reinforcing and rendering layers due to the different thermal expansion of materials under the influence of external factors; another possibility is the discoloration of the facade, associated with the different moisture-absorption rates of thermal-insulation materials [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Resistance of ETICS with Fire Barriers to Cyclic Hygrothermal Impact

et al. 2021

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The article presents the results of a set of hygrothermal experiments of an external wall insulated with an ETICS. As an add-on to previous studies, thermal insulation in the form of polystyrene with an additional horizontal strip of mineral wool was used. Laboratory tests were carried out in accordance with ETAG 004. The ETICS test rig was composed of combustible expanded polystyrene foam (EPS) and horizontal strips of noncombustible mineral wool (MW) fire barriers over windows. The physical and mechanical properties of four types of finishing renders (without an additional reinforcement mesh in base coat of the fire barriers) were analyzed across full hygrothermal cycles in a climate chamber. Temperature sensors were mounted onto different ETICS layers to collect thermal data during the weathering. The testing of ETICS regarding their hygrothermal performance revealed that there were no visible defects on any renderings and over the junctions depending on the type of used insulation materials. Results also showed that the joints of EPS and MW have approximately half of their bond strength from polystyrene strength.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Resistance of ETICS with Fire Barriers to Cyclic Hygrothermal Impact

et al. 2021

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“…From the outside, it is covered with a reinforced fabric mesh with thin-layer plaster, exposed to the direct impact of changing weather conditions. Studies on the application of ETICS have demonstrated that the finishing coat is the most important because it is exposed to climatic variables and it is often the weakest coat of all the components of ETICS [8][9][10][11]. Precipitation, solar radiation and temperature differences may have a negative impact on the thermal insulation system, causing different types of damage [1,[5][6][7][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Parallel to the emergence of new recommendations, there are various technical doubts about the possible negative effects of such a combination. One of them is the supposition that there may be cracks in the reinforcing and plastering layers, due to different thermal expansions of materials under the influence of external factors, another possibility of discoloration on the facade, associated with different absorption rates of thermal insulation materials [6][7][8][16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Verification of External Thermal Insulation Systems with Composite Thermal Insulation and Different Renders in Effect of Hydrothermal Stress

Norvaišienė

Krause

Buhagiar

et al. 2020

The 9th Innovations-Sustainability-Modernity-Openness Conference (ISMO’20)

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This paper is the research output of the laboratory ageing of external thermal insulation composite systems (ETICS). This was carried out in order to study the changes in properties of systems consisting of combustible and non-combustible thermal insulation materials, and four different types of finishing renders. Four types of the widely used, thin-layer facade rendering systems were subjected to hydrothermal cycles in a climate chamber in conformity with ETAG 004 guidelines. Analysis of the physical and mechanical properties (i.e., variation of temperature, water absorption, bond strength and mechanical resistance) of four types of ETICS are presented. This study indicates that there are no visible defects on any renderings over the junctions between polystyrene foam (EPS) and mineral wool (MW) materials when applied in ETICS.

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“…Their basic characteristics in terms of energy efficiency, environmental impact and comfort are de facto below par with the present standards driven by low-carbon policies, sustainability and features of modern energy systems. Furthermore, aging of buildings is accelerated by poor/harsh weather conditions [1,2], favoring wall degradation because of, e.g., penetration of moisture in cracks and cavities of the walls and around windows, which in turn enhances heat leaks. In fact, buildings that host people in general, either public offices or dwellings, pose particular design and engineering challenges, as the human presence entails particular requirements in terms of comfort and use of energy.…”

Section: Introductionmentioning

confidence: 99%

Model predictive control of indoor microclimate: Existing building stock comfort improvement

Ryzhov

Ouerdane

Gryazina

et al. 2019

Energy Conversion and Management

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Home retrofitting provides a means to improve the basic energy and comfort characteristics of a building stock, which cannot be renewed because of prohibitive costs. We analyze how model predictive control (MPC) applied to indoor microclimate control can provide energy-efficient solutions to the problem of occupants' comfort in a variety of situations principally imposed by external weather and room occupancy. For this purpose we define an objective function for the energy consumption, and we consider two illustrative cases: one building designed and built in recent times with modern HVAC equipment, and one designed and built several decades ago with poor thermal characteristics and no dedicated ventilation system. Our model includes various physical effects such as air infiltration and indoor thermal "inertia mass" (inner walls, floor, ceiling, and furniture), and also accounts for the impact of human presence essentially as heat and CO 2 sources. The influence on the numerical results of forecast horizons and of uncertainties due to inaccuracies in the weather and room occupancy forecasts, are analyzed. As we solve non-convex optimization problems using a linear and a nonlinear optimizer, full MPC performance is compared to both linearized MPC and a standard on/off controller. The main advantage of MPC is its ability to provide satisfactory solutions for microclimate control at

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The Effect of Temperature and Humidity on the Permanence of External Thermal Insulation Composite Systems

Cited by 14 publications

References 6 publications

Resistance of ETICS with Fire Barriers to Cyclic Hygrothermal Impact

Resistance of ETICS with Fire Barriers to Cyclic Hygrothermal Impact

Verification of External Thermal Insulation Systems with Composite Thermal Insulation and Different Renders in Effect of Hydrothermal Stress

Model predictive control of indoor microclimate: Existing building stock comfort improvement

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