A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Internal Additional Insulation: Thermal Bridges, Moisture Problems, Movements and Durability
The report deals with the problems which may be caused by internal additional insulation of an existing building component. Problems treated in this report are heat losses through and surface condensation at thermal bridges, condensation in the building components, stresses due to temperature and moisture content variations and possibly frost damage in facade materials. After internal insulation, thermal bridges such as joist connections, inner wall connections and window splays have an increased effect on heat losses through an outer wall. Computer calculations have been made to estimate this effect. Thermal bridges also reduce surface temperatures in a room. This in some cases increases the risk for surface condensation. The effect is, however, relatively small. Condensation in a building component is likely to occur if the internal insulation is made without a new vapor barrier. The condensation risk is naturally greatly influenced by the climatic conditions and the moisture capacity of the building materials. One-dimensional nonstationary calculations of the temperature and moisture field in some building components before and after additional insulation have been made with a computer program. Laboratory investigations of thermal and moisture conditions in two types of walls after thermal insulation have been made. (ERA citation 05:012076)
Internal Additional Insulation: Thermal Bridges, Moisture Problems, Movements and Durability
The report deals with the problems which may be caused by internal additional insulation of an existing building component. Problems treated in this report are heat losses through and surface condensation at thermal bridges, condensation in the building components, stresses due to temperature and moisture content variations and possibly frost damage in facade materials. After internal insulation, thermal bridges such as joist connections, inner wall connections and window splays have an increased effect on heat losses through an outer wall. Computer calculations have been made to estimate this effect. Thermal bridges also reduce surface temperatures in a room. This in some cases increases the risk for surface condensation. The effect is, however, relatively small. Condensation in a building component is likely to occur if the internal insulation is made without a new vapor barrier. The condensation risk is naturally greatly influenced by the climatic conditions and the moisture capacity of the building materials. One-dimensional nonstationary calculations of the temperature and moisture field in some building components before and after additional insulation have been made with a computer program. Laboratory investigations of thermal and moisture conditions in two types of walls after thermal insulation have been made. (ERA citation 05:012076)
Internal Additional Insulation: Thermal Bridges, Moisture Problems, Movements and Durability
A. C. Andersson (author)
1979
318 pages
Report
No indication
English
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