Provides a brief introduction to infrared theory and its application in building analysis, and describes some typical building faults that may be identified by thermographic inspection.
Reports on measurements carried out by energy consultants at a national test centre using thermography to determine any improvements in insulation and airtightness through the injection of mineral wool in Dormer houses. Measurements show results which are much better than expected. States costs and payback period of approx 6 years.
Discusses the mechanics of thermography, the type of instrument used and its application in building surveys. This includes the location and extent of any insulation deficiencies such as cold bridging or air leakage, and the quantification of existing thermal deficiencies.
Reports air tightness measures and variations in 14 low-energy houses in Heimdal, plus testing of energy saving measures for exposed detached houses. The air tightness should be considerably improved according to the regulations. Treats principles of air tightness, pressure measurement, thermography tracer gas measurements and heat loss measurements.
Describes the retrofitting of a 14-storey office block in Oslo, done as part of an energy conservation project carried out in Norway 1979-82. The main reduction in energy consumption was achieved by tightening air leaks between concrete wall elements and windows by the application of sealing compound in 2 critical types of joint in the facade. Measures the energy consumption one year before and one year after retrofitting, using thermography to find the air leaks and to verify the tightening afterwards. Also carries out pressurization tests using the building's ventilation system.
Describes the testing of 8 federal office buildings (size from 3000 sq.m. - 45000 sq.m.) for their air infiltration characteristics, as part of the NBS program to develop diagnostic test methods for evaluating the thermal integrity of federal office buildings. Performs tracer gas tests in the autumn, winter and spring to evaluate both the ventilation of these buildings during occupied periods and the natural air leakage under various weather conditions.
Presents various measurement and inspection techniques for assessing the thermal performance of the exterior envelopes of buildings. Inspection techniques include the use of ground-based infra-red thermographic surveys, aerial infra-red surveys, tracer gas air infiltration measurements, pressurization tests for measuring the tightness of the building envelope, and spot radiometer surveys for detecting gross defects. Also considers heat flow meters, a portable calorimeter and a microprocessor-driven envelope testing unit. Provides recommended procedures for each technique.
Describes a national demonstration of the effectiveness of an optimal weatherization programme for low-income families conducted by the Community Services Administration and the National Bureau of Standards. 101 family dwellings in 12 cities
Gives a summary of the work in testing of different energy-saving retrofits performed in dwellings in Sweden. The report is based on work done at the Swedish National Testing Institute and the National Swedish Institute for Building Research carried out during the winter 1979-80. Thermography methods, pressure test method, tracer gas measurements and heat flow measurements wereused in 91 houses, which were retrofitted. Describes different test methods and discusses results of measurements.
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