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College Bouwfysisch Ontwerpen 2: Koudebruggen. Henk Schellen 2003. Renovation and thermal retrofiting. Henk Schellen Eindhoven University of Technology. Research on Energy Holland 1977-1987. Introduction. 1987 Stichting Woon|Energie 10 years of research on energy in Holland
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College Bouwfysisch Ontwerpen 2: Koudebruggen Henk Schellen 2003
Renovation and thermal retrofiting Henk Schellen Eindhoven University of Technology
Introduction 1987 Stichting Woon|Energie 10 years of research on energy in Holland Thermal improvement of housing: • complexity of starting point • lack of knowledge, • understanding and • experience
Introduction 1997 Increasing knowledge, understanding,experience and technical instruments Checking of thermal and hygrical quality • during design • afterwards
Improvement of housing Categories of housing for governmentalsubsidies: • before World War II • from 1945 to 1968 • after 1968
Insulation older housing Construction details: • simple • no thermal insulation • ‘thermal bridges’
Insulation of the outer shell Simple insulation: • Insulation of the cavity • Single to double glazing • Insulation of flat or pitched roofs • Insulation of ground floor
First insulation projects Underestimation of thermal bridging: • condensation • mould growing healthness problems deterioration of wall covering
More drastic approach • external insulation • new external facade with cavity insulation • wrap around insulation: • supporting concrete beams, • lintels, • galeries, • balkonies….
Thermal bridge programs • Calculation of extra energy losses • Calculation of surface temperatures • Calculation of condensation risks • 2 dimensional • 3 dimensional
Koudebrugonderbreking • Thermische scheiding van de balkonplaat • f-factor > 0,65 (NEN 2778) • Bouwfysische probleemloze uitvoering, verhindert betonscheuren ten gevolge van onderling verschillende uitzettingen ter plaatse van de balkonaansluiting • Warmteverlies tot minimum beperkt • Voldoet aan bouwbesluit
