Abstract
Interior insulation can be used in buildings where the exterior characteristics may not be altered due to cultural heritage protection. This is common for many buildings in Sweden from the period before 1941. Energy efficiency, thermal comfort and building performance are all affected by an interior insulation. Super insulation materials present novel opportunities to save both energy and space. The aim of this study is to investigate the benefits and drawbacks of using super insulation materials as interior insulation. A field study building was investigated for feasibility, which, together with interviews with professionals in the field of architecture, cultural heritage and building consultants, give a general overview. In conclusion, there are both benefits and drawbacks with interior insulation. Super insulation provides increased flexibility in terms of interior detailing and possibility to preserve characteristic elements. On building level interior super insulation could reduce the energy use by up to 20%. This gives energy savings of 0.5 TWh on national level and a reduction of 0.7% of the total CO2 emissions for heating the Swedish building stock. A drawback is that there are few examples and little experience from building with super insulation materials among both architects and other decision makers.
Highlights
Around 78% of the energy use in the Swedish construction sector is accounted to heating and cooling of buildings
The aim of this study is to investigate the benefits and drawbacks of using super insulation materials, such as aerogel blankets (AB) and vacuum insulation panels (VIP), for interior insulation
Results from case study An old industrial brick building outside of Gothenburg on the Swedish west-coast is under initial testing for evaluation of AB and VIP on the interior of the wall, Figure 1
Summary
Around 78% of the energy use in the Swedish construction sector is accounted to heating and cooling of buildings. Around 25% of the energy for heating is used in the part of the building stock from before 1941 [2]. According to EU Building Stock Observatory (BSO) [3], more than 20% of the European building stock is built before 1945 and a large part of the building stock has very low energy performance. The current intention is to enforce national renovation strategies of buildings to reach low or zero carbon dioxide emissions from the building industry by 2050. This means many existing buildings need to be adapted
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