LoginThe book of proceedings of the 11th International BUILDAIR Symposium "Airtight Buildings, Thermography and Ventilation Systems in Practice", held on May 24- 25 2019, in Hannover, Germany. Contains 25 abstracts.
BUILDAIR Symposium 2019
This page lists the Proceedings (titles and abstracts) of the 11th International BUILDAIR Symposium, held on 24- 25 May 2019 in Hannover, Germany.
Contains 25 titles and abstracts.
Volume content
The dispute over the airtightness of the building envelope under the terms of the contract for work and services – appraisal in spring 2019 | 2019 | English
It is now internationally accepted by the disciplines of structural engineering and building physics that in the interests of energy efficiency heated buildings should be equipped with airtight building envelopes. The airtightness of the building envelope as a fundamental construction objective is therefore no longer in question. But it is...
In October 2016, a research project was completed on the "Evaluation of faults in airtight layers recommended action for construction practitioners." Written by the Fachverband Luftdichtheit im Bauwesen e. V. (Association for Airtightness in the Building Industry), the Aachener Institut für Bauschadensforschung und angewandte Bauphysik gGmbH...
If there are leaks in an airtight layer which cannot be accessed any longer, the question arises as to whether the structure is still fit for purpose, or in more pragmatic terms: "Can rework be avoided?" Rework is always extremely resource intensive, so it must be specifically required. “Moisture safety” - which is purely a matter of building physics...
Quantification and location of moisture penetration through leak-dependent creeping flows from the room into insulated, lightweight wall structures as a function of design, pressure differential, and leak position. Pressure-dependent, high-precision through-flow measurement in a facade test stand and determination of the amount...
All too often, we experts and measurement technicians are totally fixated on airtightness issues. Based on three practical cases, I would like to demonstrate that windproofness, minimal convection in the insulation layer, and the convective separation of different structural elements from one another should also be taken into account...
In recent years, the level of prefabrication in timber construction has increased many times over. Although breaking down wall sections into prefabricated elements presents few problems at certain interfaces as long as this work and subsequent installation are done with care, unfortunately this is not yet the case for the roof elements. This paper...
The load-bearing structures of historical wooden buildings have a large number of joints and penetrations that are difficult to seal. For reasons of preservation of historical monuments, wooden buildings often have to be sealed at the interior of the load-bearing structure. The existing substrates in these areas are not well suited for proper execution...
Establishing an airtight building envelope requires both materials for the surfaces and joining materials for the airtight sealing of joints between components and penetrations, as well as splices and overlappings. In wooden structures, airtight sheeting or sheeting materials are generally used as an air barrier on the surface. Any splices...
Airtightness is mandatory, which also makes ventilation concepts mandatory. Today, the construction/renovation of a building without a ventilation system is impractical in terms of energy efficiency. The minimum air change rate and moisture protection must also be taken into account. Unfortunately, in many buildings...
New and modernized buildings must have ventilation systems – that’s the widely held view. But is it true? What is the energy efficiency potential of a residential ventilation system – and what is the motivation for providing ventilation systems? The DIN 1946-6 standard for the ventilation of residential buildings allows for outdoor air...
Feedback on full ventilation system reconditioning in a non-standard sealed building | 2019 | English
This paper deals with the feedback of a full of a ventilation system reconditioning in a non- standard sealed building. This volume was previously retrofitted and immediately shows many difficulties to maintain good indoor air quality in some parts of the occupied volume. Indeed, a permanent well functioning of the ventilation system...
Thermographic investigations often find application in energy consulting or for identifying the causes of problems that are related to building physics. Since this measuring technique is complex, measurement inaccuracies and errors are not uncommon. Thus in order to obtain a meaningful measurement, the object under investigation...
This contribution is made of three parts. Firstly, the in-situ measurement using direct component testing has been described, as such as the required equipment. Secondly, the measurement method has been applied to three different cases of windows: one loose pressure chamber and two fixed pressure chambers. The observation...
Assessment of durability of airtightness in passive houses through recurring testing | 2019 | English
In this study, 5 passive houses were tested several times over a period of 6 or 11 years. Besides the repeated testing, information about the conditions of the buildings service over the period between the successive tests was collected in order to explain the differences between the test results. The buildings were tested by...
The trend in Germany and in some neighboring countries is towards increasingly densely constructed buildings. Furthermore, a growing number of individual apartments are being measured. We note that measurement engineers are confronted with new challenges when conducting air permeability measurements: Patience and an...
Measurement at multi-family dwellings – spot-check measurements and internal leakages | 2019 | English
To measure airtightness, large buildings (multi-family dwellings) require more time, personnel, and equipment than small buildings (single-family dwellings). However, this outlay is not due to stricter requirements relating to the envelope surface of larger buildings, but to the more complex structure (access, supply). Exterior envelope surfaces and interior joint faces make specific contributions to air permeability, depending on the selected design, location in the building...
Report on air permeability measurements in consumer markets and office blocks in actual practice | 2019 | English
Standards, energy saving regulations and certifications from e.g. the DGNB (German Sustainable Building Council) mean that the measuring service provider must possess specialist know-how to conduct air permeability measurements at consumer markets, commercial buildings and other large structures. The issues and problems that arise...
Because of the major effects of wind and thermal conditions on high-rise buildings, when conducting blower door measurements special procedures must be followed. The standards EN 13829 and ISO 9972 do not provide sufficient guidance for this. This paper is intended as an aid for carrying out airtightness measurements...
A procedure for the preparation of buildings for airtightness checks in compliance with legal requirements was to be defined in a standard. It should be possible to transfer the measurement result directly into the energy performance calculation as specified in DIN V 18599 without making any mathematical corrections. Checklists in...