Holzbalkenauflager in historischem Mauerwerk: Analyse, Bewertung und energetische Sanierung mittels Innendämmung

Ruisinger, Ulrich; Stöcker, Eric; Grunewald, John; Stopp, Horst; Strangfeld, Peter; Staar, Andrea; Krus, Martin; Hofbauer, Wolfgang; Großkinsky, Theo; Odgaard, Tommy; Bjarløv, Søren Peter; Lyngby, Kongens

doi:10.1002/9783433606964.ch11

Cited by 3 publications

(3 citation statements)

References 25 publications

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“…The lab tests described in chapter 2, allow to identify wood fibre insulation materials, which are equal or even more resistant to decay fungi than solid wood. Consequently, the available temperature and moisture dependent limit curves for example from [5] or even the transient decay prediction model from [6], which are both limited to solid wood up to now, can be also used for such resistant fibre insulation materials. If these limits are applied on the results of hygrothermal simulations according to EN 15026 [7] or ASHRAE standard 160 [8], a reliable prediction and evaluation concerning the use of wood fibre as interior insulation becomes possible.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore it doesn't make sense to use conventional steady state limit values, like 18 or 20 % by mass, which ignore both, the coinciding temperatures and the duration of exposure. While for solid wood, temperature and humidity dependent limit values [1] [2] [3] [4] [5] and even transient evaluation models [6] are already available, such limit values and models are still missing for wood and natural fibre insulation materials.…”

Section: Introduction/backgroundmentioning

confidence: 99%

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Evaluation of decay resistance of wood fibre insulation based on hygrothermal simulation and comparative laboratory tests

Zirkelbach

Eri

2021

Evaluation of Decay Resistance of Wood Fibre Insulation Based on Hygrothermal Simulation and Comparative Laboratory Tests

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To reduce CO2 emissions and save grey energy, natural materials like wood and wooden materials are becoming more and more important. However, these products are particularly sensitive to moisture, as they can rot or be attacked by decay fungi. In the past years, new and detailed knowledge on the decay process of wood was gained. This knowledge allows the definition of more sophisticated limit conditions depending on coinciding heat and moisture and their duration, which can replace simple steady state limits like the widely used 20 % by mass. For wooden materials and natural fibre insulations, in most regulations the moisture limits are even lower -although there are certainly materials that are more resistant than solid wood itself. Therefore, within a project dealing with wood fibre as interior insulation, which is exposed to increased moisture levels during the winter months, the durability of such materials against decay is compared at different critical temperature and humidity conditions to the one of solid wood. Based on these results, the more resistant wood fibre materials can be evaluated like solid wood. Thus, their performance can be predicted more accurately by hygrothermal simulations and their application fields accordingly be extended.Peer-review under the responsibility of the organizing committee of the ICMB21.

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Section: Discussionmentioning

confidence: 99%

Section: Introduction/backgroundmentioning

confidence: 99%

Evaluation of decay resistance of wood fibre insulation based on hygrothermal simulation and comparative laboratory tests

Zirkelbach

Eri

2021

Evaluation of Decay Resistance of Wood Fibre Insulation Based on Hygrothermal Simulation and Comparative Laboratory Tests

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“…However, the yearly refurbishment rate for Germany as an example is with round about 1 % [2] significantly too low to achieve the goals mentioned above. Therefore it is also necessary to apply more interior insulations, whose potential was highlighted by various research projects in the past years [2] [3] [4].…”

Section: Introductionmentioning

confidence: 99%

Classification and simplified design rules concerning the moisture performance of capillary active insulation materials

Zirkelbach,

Tanaka,

Schöner

2023

J. Phys.: Conf. Ser.

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Conventional interior insulation systems protect the wall from condensation in winter by the help of vapor barriers or vapor retarding insulation materials. However, these solutions also reduce the drying potential of the walls towards the inside. This can be a disadvantage if wetting from the outside due to rain or other influences takes place and the drying potential to the outside is not sufficient. In such cases, so called capillary active materials can be an alternative, because they provide additional drying potential to the inside in summer thanks to a rather low vapor diffusion resistance. In winter they work without vapor retarders because they can store and wick water away from the condensation plane back towards the interior by capillary action. In practice, there are currently many different materials under the label "capillary active" with a correspondingly wide range in terms of moisture storage, liquid transport and vapor diffusion resistance and it is difficult to decide, whether material is suitable for an application or not. There is still missing a common definition of the performance of such materials. While for most other materials already simplified design and application rules for the application as interior insulation are available, capillary active interior insulation materials still require an individual design, normally by the help of hygrothermal simulation. In order to simplify also their practice application, a classification of the moisture performance of capillary active interior insulation, considering the influencing parameters of relevance on the moisture level at the critical interface between wall and interior insulation was developed. On this basis, also a simplified verification process as well as design rules for the main practical application fields become possible, which allows designers to choose an appropriate system for the specific situation.

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Calibration of Hygrothermal Simulations by the Help of a Generic Optimization Tool

2017

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Holzbalkenauflager in historischem Mauerwerk: Analyse, Bewertung und energetische Sanierung mittels Innendämmung

Cited by 3 publications

References 25 publications

Evaluation of decay resistance of wood fibre insulation based on hygrothermal simulation and comparative laboratory tests

Evaluation of decay resistance of wood fibre insulation based on hygrothermal simulation and comparative laboratory tests

Classification and simplified design rules concerning the moisture performance of capillary active insulation materials

Calibration of Hygrothermal Simulations by the Help of a Generic Optimization Tool

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