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- W2245114000 abstract "Cavity wall insulation bypasses several problems faced by other wall insulation techniques: the facade and interior finish remain unaltered, the procedure is quick and relatively cheap… As most of the existing houses in Flanders, dating from after the second word war, have cavity walls, the potential of large-scale implementation of cavity wall insulation is obvious. This large scale implementation has greatly been restrained by the lack of knowledge and trust in this technique. Contrary to other countries such as Great-Britain and the Netherlands, there is a huge lack of well documented exemplary projects, performance analysis and a quality control framework for retrofitted cavity wall insulation within the Belgian building framework. As an attempt to respond to these demands, a study on this technique has been put in place, putting together several Belgian research institutes. The aim of the project was to derive information about the thermal performance, the energy saving potential and cost effectiveness of the insulation technique, and to identify risks related to thermal bridging, rain water penetration and frost damage.Within this two-year research project, a set of 25 dwellings was analysed as case-studies. This test-group was composed as a sample of the main products used for retrofitted cavity wall insulation in Belgium (UF, PUR, mineral wool, EPS, SLS). The selected dwellings were divided in 3 groups: a first group with cavity insulation installed before 1990 (4), a second with cavity insulation installed after 1990 (10), and a third group with cavity insulation installed during the research project (10). Performance analysis was applied on several complementary levels and aspects such as thermal properties, airtightness, indoor climate, thermal bridges and energy savings. Therefore, the following measurements were performed in each of the case studies: heat fluxmeasurements and infrared thermography, blowerdoor-tests, measurements of indoor-climate and surface temperatures, record-keeping of heating consumption. In the third sample of dwellings, measurements were made before and after retrofitting the walls. These measurements were compared against lab-measurements, heat transfer calculations and energy use simulations with a quasi steady-state method.The results were showing good correlations between theory and practice, except for energy consumption if individual user-related factors are not thoroughly analysed and taken into account. This paper will focus on the measurements made on the case-study-houses. The main goal will be to compare the on-site-measurements with the computer-based analysis, focussing mainly on the thermal properties of the walls, thermal bridges and energy use prediction. Also the remaining questions will be emphasized, eg on the need of installing ventilation systems in order to prevent mould problems at existing thermal bridges." @default.
- W2245114000 created "2016-06-24" @default.
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- W2245114000 date "2010-01-01" @default.
- W2245114000 modified "2023-09-23" @default.
- W2245114000 title "Retrofit cavity-wall insulation: performance analysis from in-situ measurements" @default.
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