An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage
The recent research on highly insulated structures presents controversial conclusions on risks in moisture safety. This paper addresses these controversial issues through investigating the hygrothermal performance of energy efficient envelope structures under high moisture loads. The experiments con...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-03-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/6/1222 |
| _version_ | 1811269269507276800 |
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| author | Klaus Viljanen Xiaoshu Lu |
| author_facet | Klaus Viljanen Xiaoshu Lu |
| author_sort | Klaus Viljanen |
| collection | DOAJ |
| description | The recent research on highly insulated structures presents controversial conclusions on risks in moisture safety. This paper addresses these controversial issues through investigating the hygrothermal performance of energy efficient envelope structures under high moisture loads. The experiments consist of built-in moisture and rain leakage tests in mineral wool insulated structures. A heat and moisture transfer simulation model is developed to examine the drying-out ability in both warm and cold seasons. The results show that the energy efficient structures have an excellent drying out ability against built-in and leakage moisture. The difference in the drying ability is limited compared to conventional structures. A critical leakage moisture amount reaching the insulation cavity for a wood frame wall is determined to be between 6.9–20.7 g in a single rain event occurring every other day. Further research is required to target highly insulated structures, particularly addressing water vapor diffusion and convection. |
| first_indexed | 2024-04-12T21:39:05Z |
| format | Article |
| id | doaj.art-9e2b6951b31646ecb9ad1bf1ff970b4f |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-04-12T21:39:05Z |
| publishDate | 2019-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-9e2b6951b31646ecb9ad1bf1ff970b4f2022-12-22T03:15:49ZengMDPI AGApplied Sciences2076-34172019-03-0196122210.3390/app9061222app9061222An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain LeakageKlaus Viljanen0Xiaoshu Lu1Department of Civil Engineering, Aalto-University, FIN-02130 Espoo, FinlandDepartment of Civil Engineering, Aalto-University, FIN-02130 Espoo, FinlandThe recent research on highly insulated structures presents controversial conclusions on risks in moisture safety. This paper addresses these controversial issues through investigating the hygrothermal performance of energy efficient envelope structures under high moisture loads. The experiments consist of built-in moisture and rain leakage tests in mineral wool insulated structures. A heat and moisture transfer simulation model is developed to examine the drying-out ability in both warm and cold seasons. The results show that the energy efficient structures have an excellent drying out ability against built-in and leakage moisture. The difference in the drying ability is limited compared to conventional structures. A critical leakage moisture amount reaching the insulation cavity for a wood frame wall is determined to be between 6.9–20.7 g in a single rain event occurring every other day. Further research is required to target highly insulated structures, particularly addressing water vapor diffusion and convection.https://www.mdpi.com/2076-3417/9/6/1222hygrothermal behaviourbuilt-in moistureleakagewood frame wall |
| spellingShingle | Klaus Viljanen Xiaoshu Lu An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage Applied Sciences hygrothermal behaviour built-in moisture leakage wood frame wall |
| title | An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage |
| title_full | An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage |
| title_fullStr | An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage |
| title_full_unstemmed | An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage |
| title_short | An Experimental Study on the Drying-Out Ability of Highly Insulated Wall Structures with Built-In Moisture and Rain Leakage |
| title_sort | experimental study on the drying out ability of highly insulated wall structures with built in moisture and rain leakage |
| topic | hygrothermal behaviour built-in moisture leakage wood frame wall |
| url | https://www.mdpi.com/2076-3417/9/6/1222 |
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