Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495
Building façades must endure severe climatic exposure throughout their lifetimes. To prevent damage and expensive repairs, ageing tests are used in durability assessments. The NT Build 495 describes an artificial ageing procedure to address building material and component resistance to ultraviolet (...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2021-11-01
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| Series: | Buildings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-5309/11/12/568 |
| _version_ | 1797506373710249984 |
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| author | Silje Kathrin Asphaug Berit Time Tore Kvande |
| author_facet | Silje Kathrin Asphaug Berit Time Tore Kvande |
| author_sort | Silje Kathrin Asphaug |
| collection | DOAJ |
| description | Building façades must endure severe climatic exposure throughout their lifetimes. To prevent damage and expensive repairs, ageing tests are used in durability assessments. The NT Build 495 describes an artificial ageing procedure to address building material and component resistance to ultraviolet (UV) light, heat, water, and frost using a climate simulator. The test has been used for decades to investigate exterior surface materials and façade products but has only recently been adopted for multi-layered systems. This study investigates moisture accumulation in a façade system for retrofitting based on concrete and thermal insulation. Hygrothermal simulations of the façade system subjected to ageing were conducted. Moisture accumulation was considered theoretically for the current test procedure and compared to a modified setup in which the interior climate was controlled at 21 °C. Physical measurements were performed in the climate simulator to determine the boundary conditions. Results showed that moisture accumulation in the thermal insulation was largely affected by the type of concrete, that applying a water-repellent surface treatment reduced moisture accumulation, and that the current setup resulted in less moisture accumulation compared to the modified setup. The latter implicates accelerated degradation with the modified setup. |
| first_indexed | 2024-03-10T04:32:45Z |
| format | Article |
| id | doaj.art-5e8b6dc3cf764c96b67ee7915fba556c |
| institution | Directory Open Access Journal |
| issn | 2075-5309 |
| language | English |
| last_indexed | 2024-03-10T04:32:45Z |
| publishDate | 2021-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Buildings |
| spelling | doaj.art-5e8b6dc3cf764c96b67ee7915fba556c2023-11-23T04:02:51ZengMDPI AGBuildings2075-53092021-11-01111256810.3390/buildings11120568Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495Silje Kathrin Asphaug0Berit Time1Tore Kvande2Department of Civil and Environmental Engineering, Norwegian University of Science and Technology, NO 7491 Trondheim, NorwaySINTEF Community, Department of Architecture, Materials and Structures, NO 7465 Trondheim, NorwayDepartment of Civil and Environmental Engineering, Norwegian University of Science and Technology, NO 7491 Trondheim, NorwayBuilding façades must endure severe climatic exposure throughout their lifetimes. To prevent damage and expensive repairs, ageing tests are used in durability assessments. The NT Build 495 describes an artificial ageing procedure to address building material and component resistance to ultraviolet (UV) light, heat, water, and frost using a climate simulator. The test has been used for decades to investigate exterior surface materials and façade products but has only recently been adopted for multi-layered systems. This study investigates moisture accumulation in a façade system for retrofitting based on concrete and thermal insulation. Hygrothermal simulations of the façade system subjected to ageing were conducted. Moisture accumulation was considered theoretically for the current test procedure and compared to a modified setup in which the interior climate was controlled at 21 °C. Physical measurements were performed in the climate simulator to determine the boundary conditions. Results showed that moisture accumulation in the thermal insulation was largely affected by the type of concrete, that applying a water-repellent surface treatment reduced moisture accumulation, and that the current setup resulted in less moisture accumulation compared to the modified setup. The latter implicates accelerated degradation with the modified setup.https://www.mdpi.com/2075-5309/11/12/568building defectsaccelerated ageingdurabilityETICSmoisture controlclimate adaptation |
| spellingShingle | Silje Kathrin Asphaug Berit Time Tore Kvande Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495 Buildings building defects accelerated ageing durability ETICS moisture control climate adaptation |
| title | Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495 |
| title_full | Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495 |
| title_fullStr | Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495 |
| title_full_unstemmed | Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495 |
| title_short | Moisture Accumulation in Building Façades Exposed to Accelerated Artificial Climatic Ageing—A Complementary Analysis to NT Build 495 |
| title_sort | moisture accumulation in building facades exposed to accelerated artificial climatic ageing a complementary analysis to nt build 495 |
| topic | building defects accelerated ageing durability ETICS moisture control climate adaptation |
| url | https://www.mdpi.com/2075-5309/11/12/568 |
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