English

Purpose of the work

Wooden flat roofs are being increasingly constructed without the tried and tested sub- ventilation layer of the sealing sheet. However, some regulations refer to the high risk of damage to such structures if the sealing on top of the insulation is largely vapor proof. This research was to analyze whether more recent recommendations, as for example installing a variable vapor retarder, lead to a significant reduction in the risk of damage.

Method of approach

Purpose of the work

The German Industrial Standard DIN 4108-7 has been the standard to stipulate the requirements as well as recommendations for planning and implementing airtight construction for a long time (since 2001). However, the principles of airtight building have not yet been well established in general building practice.

Purpose of the work

The presentation provides background information on the calibration of airtightness testing devices.

Content of the presentation

Purpose of the work

To review the impact of air tightness testing in construction in Ireland since the introduction of mandatory testing under the National Building Regulations in 2008 and the subsequent enforcement of a National Certification Scheme.

Method of approach

Review of National Building Regulations in 2008 & 2011 and implications on buildings being constructed and the industry's acceptance.

Content of the presentation

Proposals for solutions in accordance with German standard DIN 4108 Teil 7 What does real life look like? What can actually be solved? Challenges, interface issues between the different trades and crafts, and possible suggestions for solutions.

Purpose of the work

Can the minimum air change in naturally window-ventilated units be covered only through leakages?

Content of the presentation

In general, the infiltration airflow rate is dependent on meteorological conditions, especially wind pressure on the building / unit, and with regard to thermal effects, the temperature differential between the interior and the exterior, i.e. the infiltration airflow varies strongly.

Purpose of the work

Many top-floor apartments and single-family homes from the ’80s and ’90s had been insulated in the roof area using aluminum-clad panels or PE foils and had frequently been covered with profiled wood. These buildings suffer from a significant lack of airtightness that can be retrofitted from the inside with a high technical quality. The improvement in airtightness achieved by this approach in most cases shows better results than a retrofit from the outside.

Method of approach

Content of the presentation

Purpose of the work

Purpose of the work

Is it possible to estimate an air infiltration flow rate, based on infrared images?

Method of approach

Laboratory tests and numerical simulations

Content of the presentation

This paper discusses laboratory measurements on a small test house. IRT measurements and (de)pressurization tests were performed on different types of junctions, e.g. at the window-wall interface. The results were analysed by calculating the temperature factor, to compare IRT images from different joints.