Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Challenges when retrofitting multi-storey buildings with interior thermal insulation
Today, approximately 25 % of the apartments in the Danish multi-storey stock of more than two stories are found in buildings with masonry facades erected in the period 1850-1930. Of these apartments, 71 % are situated in Copenhagen, the Danish capital. The building traditions and norms in force during the period entail that these buildings share similar characteristics, including solid masonry walls and embedded wooden components. The energy use and indoor climate was not in focus during construction, wherefore the current occupants cannot expect modern levels of thermal comfort and the section include a considerable energy saving potential. It is evident that thermal comfort and energy use can be improved by increasing the thermal resistance of the façade. With focus on the masonry part of the total façade area, this can be achieved with thermal insulation applied to the interior or exterior surface. While application to the exterior surface is the best solution from a building physics point of view, the retention of the exterior façade expression is often a desire from the owner or a preservation requirement, leaving application to the interior surface as the only possibility. The buildings from the period have been investigated to determine the degree of shared characteristics within the building segment, showing similar building techniques with consistent thin spandrels under the windows and a low share of available interior surface area for the application of insulation. There were performed thermal simulations of characteristic façade sections in 3-dimensional models, finding that insulation of the spandrel can achieve up to 40 % of the maximum possible reduction achievable from reducing the thermal transmittance by retrofitting the masonry with interior insulation. The influence on the hygrothermal conditions when applying interior thermal insulation to solid masonry walls have been investigated experimentally in a case study and by comparative analyses of results from two field experiments. The case ...
Challenges when retrofitting multi-storey buildings with interior thermal insulation
Today, approximately 25 % of the apartments in the Danish multi-storey stock of more than two stories are found in buildings with masonry facades erected in the period 1850-1930. Of these apartments, 71 % are situated in Copenhagen, the Danish capital. The building traditions and norms in force during the period entail that these buildings share similar characteristics, including solid masonry walls and embedded wooden components. The energy use and indoor climate was not in focus during construction, wherefore the current occupants cannot expect modern levels of thermal comfort and the section include a considerable energy saving potential. It is evident that thermal comfort and energy use can be improved by increasing the thermal resistance of the façade. With focus on the masonry part of the total façade area, this can be achieved with thermal insulation applied to the interior or exterior surface. While application to the exterior surface is the best solution from a building physics point of view, the retention of the exterior façade expression is often a desire from the owner or a preservation requirement, leaving application to the interior surface as the only possibility. The buildings from the period have been investigated to determine the degree of shared characteristics within the building segment, showing similar building techniques with consistent thin spandrels under the windows and a low share of available interior surface area for the application of insulation. There were performed thermal simulations of characteristic façade sections in 3-dimensional models, finding that insulation of the spandrel can achieve up to 40 % of the maximum possible reduction achievable from reducing the thermal transmittance by retrofitting the masonry with interior insulation. The influence on the hygrothermal conditions when applying interior thermal insulation to solid masonry walls have been investigated experimentally in a case study and by comparative analyses of results from two field experiments. The case ...
Challenges when retrofitting multi-storey buildings with interior thermal insulation
Odgaard, Tommy Riviere (Autor:in)
01.01.2019
Odgaard , T R 2019 , Challenges when retrofitting multi-storey buildings with interior thermal insulation . B Y G D T U. Rapport , no. R-386 , Technical University of Denmark, Department of Civil Engineering .
Buch
Elektronische Ressource
Englisch
DDC:
690
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