Tilläggsisolering - lönsamt enligt en livscykelkostnadsmodell?
It is found that the properties of the record years of 1965-1975 is leaking a lot of energy andthese properties are facing a major energy efficiency. From the energy aspect, the facade isafflicted with poor thermal insulation which is a big problem. To address this problem addinginsulation is a good alternative to reduce overall energy consumption of a building. Thewindows on these buildings are also a problem from the energy point of view. Therefore,there are many reasons considered for energy upgrading. These types of investments are oftenassociated with a very high initial investment, however, investment decision is also based inthe savings that could be the result of the operation.With this as background the authors of this paper is questioning whether it is viable to energyupgrade by additional insulation compared to not make any energy upgrade at all of theproperties built during the record years.The purpose of this paper is to describe the energy problems that exist with two types ofwallconstructions that were common during the record years and the financial impact theseproblems resulting. By examining the costs, adding insulation the essay will through a lifecycle cost show which action that is most profitable. The authors of this paper have conducteda case study of two wallconstructions of the types curtain walls and concrete. The thesisbegan by contacting Sto Scandinavia AB, which is a company that produces facadeconstructions and insulationsystems. Through interview with Claes Göran Claesson (ProductObject Manager) on Sto Scandinavia, all pricing information by adding insulation could beidentified. Contact was also made with energy expert Per Karnehed who assisted with theenergy analysis of two properties which form the basis for the calculations in this paper.Using this information a life-cycle cost was calculated with the result that the insulation of thewallconstructions were viable over a 50 year period. The crucial factor in this calculation wasthe price of energy and futue cost of this. The calculations presented in this paper clearlyshows in the long run that the energy cost is the largest post, not the initial investment.